Publications

C.N. Naylor, C. Schaefer, A.T. Kirk and S. Zimmermann (2023): The origin of isomerization of aniline revealed by High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  Physical Chemistry Chemical Physics, vol. 25, no. 2, pp. 1139-1152, 2023
DOI: 10.1039/D2CP01994A

M. Hitzemann, C. Schaefer, A.T. Kirk, A. Nitschke, M. Lippmann and S. Zimmermann (2023): Easy to assemble dielectric barrier discharge plasma ionization source based on printed circuit boards,  Analytica Chimica Acta, vol. 1239, 340649, 2023
DOI: 10.1016/j.aca.2022.340649

A.T. Kirk, M.J. Kueddelsmann and S. Zimmermann (2022): Ultrasensitive ion source for drift tube ion mobility spectrometers combining optimized sample gas flow with both chemical ionization and direct ionization,  Analytical Chemistry, vol. 94, no. 28, pp. 9960-9969, 2022
DOI: 10.1021/acs.analchem.2c00955

C. Schaefer, F. Schlottmann, A.T. Kirk and S. Zimmermann (2022): Influence of sample gas humidity on product ion formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  J. of The American Society for Mass Spectrometry, vol. 33, no. 6, pp. 1048-1060, 2022
DOI: 10.1021/jasms.2c00099

C. Wendt, A. Bohnhorst, S. Zimmermann and A.T. Kirk (2022): Ultra-low noise current meter for measuring quickly changing currents from attoampere to nanoampere,  tm – Technisches Messen, vol. 89, no. 12, pp. 847-858, 2022
DOI: 10.1515/teme-2022-0049

M. Hitzemann, A.T. Kirk, M. Lippmann, A. Bohnhorst and S. Zimmermann (2022): Miniaturized drift tube ion mobility spectrometer with ultra-fast polarity switching,  Analytical Chemistry, vol. 94, no. 2, pp. 777-786, 2022
DOI: 10.1021/acs.analchem.1c03268

A. Bohnhorst, A.T. Kirk and S. Zimmermann (2021): Toward Compact High-Performance Ion Mobility Spectrometers: Ion Gating in Ion Mobility Spectrometry,  Analytical Chemistry, vol. 93, no. 15, pp. 6062-6070, 2021
DOI: 10.1021/acs.analchem.0c04140

A.T. Kirk, A. Bohnhorst and S. Zimmermann (2021): Analytical model for the signal-to-noise-ratio of drift tube ion mobility spectrometers,  tm – Technisches Messen, vol. 88, no. 5, pp. 262-273, 2021
DOI: 10.1515/teme-2021-0013

C. Schaefer, M. Allers, A.T. Kirk, F. Schlottmann and S. Zimmermann (2021): Influence of reduced field strength on product ion formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  J. of The American Society for Mass Spectrometry, vol. 32, no. 7, pp. 1810–1820, 2021
DOI: 10.1021/jasms.1c00156

D. Erdogdu, W. Wissdorf, M. Allers, A.T. Kirk, H. Kersten, S. Zimmermann and T. Benter (2021): Simulation of cluster dynamics of proton-bound water clusters in a high kinetic energy ion-mobility spectrometer,  Analytical Chemistry, vol. 32, no. 9, pp. 2436-2450, 2021
DOI: 10.1021/jasms.1c00140

M. Allers, A.T. Kirk, C. Schaefer, F. Schlottmann and S. Zimmermann (2021): Formation of positive product ions from low proton affine substances in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  Rapid Communications in Mass Spectrometry, vol. 35, no. 4, e8998:1-13
DOI: 10.1002/rcm.8998

A. Bohnhorst, M. Hitzemann, M. Lippmann, A.T. Kirk and S. Zimmermann (2020): Enhanced resolving power by moving field ion mobility spectrometry,  Analytical Chemistry, vol. 92, no. 19, pp. 12967-12974, 2020
DOI: 10.1021/acs.analchem.0c01653

A.T. Kirk, M.J. Kueddelsmann, A. Bohnhorst, M. Lippmann and S. Zimmermann (2020): Improving ion mobility spectrometer sensitivity through the extended field switching ion shutter,  Analytical Chemistry, vol. 92, no. 7, pp. 4838-4847, 2020
DOI: 10.1021/acs.analchem.9b04259

C. Schaefer, A.T. Kirk, M. Allers and S. Zimmermann (2020): Ion mobility shift of isotopologues in a High Kinetic Energy Ion Mobility Spectrometer (HiKE-IMS) at elevated effective temperatures,  J. of The American Society for Mass Spectrometry, vol. 31, no. 10, pp. 2093-2101, 2020
DOI: 10.1021/jasms.0c00220

F. Schlottmann, A.T. Kirk, M. Allers, A. Bohnhorst and S. Zimmermann (2020): High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) at 40 mbar,  J. of The American Society for Mass Spectrometry, vol. 31, no. 7, pp. 1536-1543, 2020
DOI: 10.1021/jasms.0c00098

M. Allers, A.T. Kirk, B. Timke, D. Erdogdu, W. Wissdorf, T. Benter and S. Zimmermann (2020): Negative reactant ion formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  J. of The American Society for Mass Spectrometry, vol. 31, no. 9, pp. 1861-1874, 2020
DOI: 10.1021/jasms.0c00126

M. Allers, A.T. Kirk, C. Schaefer, D. Erdogdu, W. Wissdorf, T. Benter and S. Zimmermann (2020): Field-dependent reduced ion mobilities of positive and negative ions in air and nitrogen in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  J. of The American Society for Mass Spectrometry, vol. 31, no. 10, pp. 2191-2201, 2020
DOI: 10.1021/jasms.0c00280

M. Allers, A.T. Kirk, M. Eckermann, C. Schaefer, D. Erdogdu, W. Wissdorf, T. Benter and S. Zimmermann (2020): Positive reactant ion formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  J. of The American Society for Mass Spectrometry, vol. 31, no. 6, pp. 1291-1301, 2020
DOI: 10.1021/jasms.0c00114

M. Allers, A.T. Kirk, N. Rossbitzky, D. Erdogdu, R. Hillen, W. Wissdorf, T. Benter and S. Zimmermann (2020): Analyzing positive reactant ions in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) by HiKE-IMS-MS,  J. of The American Society for Mass Spectrometry, vol. 31, no. 3, pp. 812-821, 2020
DOI: 10.1021/jasms.9b00087

M. Grabarics, M. Lettow, A.T. Kirk, G. von Helden, T.J. Causon and K. Pagel (2020): Plate-height model of ion mobility-mass spectrometry,  Analyst, vol. 145, pp. 6313-6333, 2020
DOI: 10.1039/D0AN00433B

M. Lippmann, A.T. Kirk, M. Hitzemann and S. Zimmermann (2020): Compact and sensitive dual drift tube ion mobility spectrometer with a new dual field switching ion shutter for simultaneous detection of both ion polarities,  Analytical Chemistry, vol. 92, no. 17, pp. 11834-11841, 2020
DOI: 10.1021/acs.analchem.0c02166

M. Lippmann, A.T. Kirk, M. Hitzemann and S. Zimmermann (2020): IMS Instrumentation I: Isolated data acquisition for ion mobility spectrometers with grounded ion sources,  Int. J. for Ion Mobility Spectrometry, vol. 23, no. 2, pp. 69-74, 2020
DOI: 10.1007/s12127-020-00260-5

A. Bohnhorst, A.T. Kirk, Y. Yin and S. Zimmermann (2019): Ion fragmentation and filtering by alpha function in ion mobility spectrometry for improved compound differentiation,  Analytical Chemistry, vol. 91, no. 14, pp. 8941-8947, 2019
DOI: 10.1021/acs.analchem.9b00810

A.T. Kirk, A. Bohnhorst, C.-R. Raddatz, M. Allers and S. Zimmermann (2019): Ultra-high resolution ion mobility spectrometry – current instrumentation, limitations and future developments,  Analytical and Bioanalytical Chemistry, vol. 411, no. 24, pp. 6229-6246, 2019
DOI: 10.1007/s00216-019-01807-0

E. Bunert, A.T. Kirk, O. Kaebein and S. Zimmermann (2019): Comparison of spatial ion distributions from different ionization sources,  Int. J. for Ion Mobility Spectrometry, vol. 22, no. 1, pp. 21-29, 2019
DOI: 10.1007/s12127-018-0241-3

E. Bunert, M. Berger, A.T. Kirk and S. Zimmermann (2019): Non-radioactive Electron Source with Nanosecond Pulse Modulation for Atmospheric Pressure Chemical Ionization,  Review of Scientific Instruments, vol. 90, pp. 90, 113306/1-9, 2019
DOI: 10.1063/1.5126507

F. Schlottmann, M. Allers, A.T. Kirk, A. Bohnhorst and S. Zimmermann (2019): A simple printed circuit board based ion funnel for focusing low m/z ratio ions with high kinetic energies at elevated pressure,  J. of The American Society for Mass Spectrometry, vol. 30, no. 9, pp. 1813-1823, 2019
DOI: 10.1007/s13361-019-02241-3

A. Bohnhorst, A.T. Kirk, M. Berger and S. Zimmermann (2018): Fast orthogonal separation by superposition of Time of Flight and Field Asymmetric Ion Mobility Spectrometry,  Analytical Chemistry, vol. 90, no. 2, pp. 1114-1121, 2018
DOI: 10.1021/acs.analchem.7b03200

A.T. Kirk, D. Grube, T. Kobelt, C. Wendt and S. Zimmermann (2018): A high resolution high kinetic energy ion mobility spectrometer based on a low-discrimination tri-state ion shutter,  Analytical Chemistry, vol. 90, no. 9, pp. 5603-5611, 2018
DOI: 10.1021/acs.analchem.7b04586

A.T. Kirk, T. Kobelt, H. Spehlbrink and S. Zimmermann (2018): A simple analytical model for predicting the detectable ion current in ion mobility spectrometry using corona discharge ionization sources,  J. of The American Society for Mass Spectrometry, vol. 29, no. 7, pp. 1425-1430, 2018
DOI: 10.1007/s13361-018-1970-6

C.-R. Raddatz, M. Allers, A.T. Kirk and S. Zimmermann (2018): Acetone and Perdeuterated Acetone in UV-IMS,  Int. J. for Ion Mobility Spectrometry, vol. 21, no. 3, pp. 49-53, 2018
DOI: 10.1007/s12127-018-0234-2

E. Bunert, T. Reinecke, A.T. Kirk, A. Bohnhorst and S. Zimmermann (2018): Ion mobility spectrometer with orthogonal X-ray source for increased sensitivity,  Talanta, vol. 185, pp. 537-541, 2018
DOI: 10.1016/j.talanta.2018.04.035

M. Allers, A.T. Kirk and S. Zimmermann (2018): A simple centripetal force model for explaining the focusing effect of ion funnels,  International Journal of Mass Spectrometry, vol. 432, pp. 14-17, 2018
DOI: 10.1016/j.ijms.2018.07.002

M. Allers, L. Timoumi, A.T. Kirk, F. Schlottmann and S. Zimmermann (2018): Coupling of a high-resolution ambient pressure drift tube ion mobility spectrometer to a commercial time-of-flight mass spectrometer,  J. of The American Society for Mass Spectrometry, vol. 29, no. 11, pp. 2208-2217, 2018
DOI: 10.1007/s13361-018-2045-4

A.T. Kirk and S. Zimmermann (2017): HiKE-IMS: High Kinetic Energy Ion Mobility Spectrometry for quantitative and selective trace gas detection,  Journal of the European Society for Automatic Alarm Systems - EUSAS, no. 11, pp. 40-47, 2017

A.T. Kirk, C.-R. Raddatz and S. Zimmermann (2017): Separation of isotopologues in ultra-high resolution ion mobility spectrometry,  Analytical Chemistry, vol. 89, no. 3, pp. 1509-1515, 2017
DOI: 10.1021/acs.analchem.6b03300

A.T. Kirk, K. Bakes and S. Zimmermann (2017): A universal relationship between optimum drift voltage and resolving power,  Int. J. for Ion Mobility Spectrometry, vol. 20, no. 3-4, pp. 105-109, 2017
DOI: 10.1007/s12127-017-0219-6

A.T. Kirk, T. Last and S. Zimmermann (2017): A sensitive gas chromatography detector based on atmospheric pressure chemical ionization by a dielectric barrier discharge,  J. of Chromatography A, vol. 1483, pp. 120-126, 2017
DOI: 10.1016/j.chroma.2016.12.071

E. Bunert, A. Heptner, T. Reinecke, A.T. Kirk and S. Zimmermann (2017): Shutterless ion mobility spectrometer with fast pulsed electron source,  Review of Scientific Instruments, vol. 88, pp. 024102/1-7, 2017
DOI: 10.1063/1.4976021

E. Bunert, A.T. Kirk, J. Oermann and S. Zimmermann (2017): Electron capture detector based on a non-radioactive electron source: operating parameters vs. analytical performance,  Journal of Sensors and Sensor Systems, vol. 6, no. 2, pp. 381–387, 2017
DOI: 10.5194/jsss-6-381-2017

S. Engelskirchen, J. Ehlers, A.T. Kirk, A. Tipold and M. Dilly (2017): Skills-Lab-Training in der Tiermedizin - Effektive Vorbereitung auf die klinische Tätigkeit am Beispiel der Kleintierklinik der Stiftung Tierärztliche Hochschule Hannover,  Tierärztliche Praxis Kleintiere, vol. 6, pp. 397-405, 2017

A. Bohnhorst, A.T. Kirk and S. Zimmermann (2016): Simulation aided design of a low cost ion mobility spectrometer based on printed circuit boards,  Int. J. for Ion Mobility Spectrometry, vol. 19, no. 2-3, pp. 167-174, 2016

A. Heptner, N. Angerstein, T. Reinecke, E. Bunert, A.T. Kirk, I. Niedzwiecki and S. Zimmermann (2016): Improving the analytical performance of ion mobility spectrometer using a non-radioactive electron source,  Int. J. for Ion Mobility Spectrometry, vol. 19, no. 4, pp. 175-182, 2016

A.T. Kirk and S. Zimmermann (2016): Ion mobility spectrometry,  GIT Labor-Fachzeitschrift, vol. 9, pp. 18-23, 2016

A.T. Kirk and S. Zimmermann (2016): Ion mobility spectrometry,  Chemie in unserer Zeit, vol. 50, no. 5, pp. 310-315, 2016

D. Senic, K.A. Remley, C.-M.J. Wang, D.F. Williams, C.L. Holloway, D.C. Ribeiro and A.T. Kirk (2016): Estimating and reducing uncertainty in reverberation-chamber characterization at millimeter-wave frequencies,  IEEE Transactions on Antennas and Propagation, vol. 64, no. 7, pp. 3130-3140, 2016
DOI: 10.1109/TAP.2016.2556711

T. Reinecke, A.T. Kirk, A. Ahrens, C.-R. Raddatz, C. Thoben and S. Zimmermann (2016): A compact high-resolution electrospray ionization ion mobility spectrometer,  Talanta, vol. 150, pp. 1-6, 2016
DOI: 10.1016/j.talanta.2015.12.006

T. Reinecke, A.T. Kirk, A. Heptner, D. Niebuhr, S. Böttger and S. Zimmermann (2016): A compact high-resolution X-ray ion mobility spectrometer,  Review of Scientific Instruments, vol. 87, pp. 053120/1-4, 2016

A.T. Kirk and S. Zimmermann (2015): An analytical model for the optimum drift voltage of drift tube ion mobility spectrometers with respect to resolution and detection limits,  Int. J. for Ion Mobility Spectrometry, vol. 18, no. 3, pp. 129-135, 2015

A.T. Kirk and S. Zimmermann (2015): Pushing a compact 15 cm long ultra-high resolution drift tube ion mobility spectrometer with R=250 to R=425 using peak deconvolution,  Int. J. for Ion Mobility Spectrometry, vol. 18, no. 1-2, pp. 17-22, 2015

M. Allers, A. Bohnhorst, A. T. Kirk, B. Ungethuem, A. Walte and S. Zimmermann (2015): Transient simulation of moving ion clouds in time-of-flight ion mobility spectrometers operating with DC and AC fields,  Int. J. for Ion Mobility Spectrometry, vol. 18, no. 3, pp. 107-115, 2015

P. Cochems, A.T. Kirk, E. Bunert, M. Runge, P. Goncalves and S. Zimmermann (2015): Fast pulsed operation of a small non-radioactive electron source with continuous emission current control,  Review of Scientific Instruments, vol. 86, pp. 065102/1-7, 2015

A.T. Kirk and S. Zimmermann (2014): Bradbury-Nielsen vs. Field switching shutters for high resolution drift tube ion mobility spectrometers,  Int. J. for Ion Mobility Spectrometry, vol. 17, no. 3-4, pp. 131-137, 2014
DOI: 10.1007/s12127-014-0153-9

C.M.J. Wang, K.A. Remley, A.T. Kirk, R.J. Pirkl, C.L. Holloway, D.F. Williams and P.D. Hale (2014): Parameter Estimation and Uncertainty Evaluation in a Low Rician K-Factor Reverberation-Chamber Environment,  IEEE Transactions on Electromagnetic Compatibility, 2014
DOI: 10.1109/TEMC.2014.2313461

J. Langejuergen, M. Allers, J. Oermann, A. Kirk and S. Zimmermann (2014): High kinetic energy ion mobility spectrometer: Quantitative analysis of gas mixtures with ion mobility spectrometry,  Analytical Chemistry, vol. 86, no. 14, pp. 7023-7032, 2014
DOI: 10.1021/ac5011662

J. Langejuergen, M. Allers, J. Oermann, A. Kirk and S. Zimmermann (2014): Quantitative detection of benzene in toluene- and xylene-rich atmosphere using high kinetic energy IMS,  Analytical Chemistry, vol. 86, no. 23, pp. 11841-11846, 2014
DOI: 10.1021/ac5034243

P. Cochems, A. Kirk and S. Zimmermann (2014): In-circuit-measurement of parasitic elements in high gain high bandwidth low noise transimpedance amplifiers,  Review of Scientific Instruments, vol. 85, pp. 124703/1-6, 2014

A. Kirk, M. Allers, P. Cochems, J. Langejuergen and S. Zimmermann (2013): A compact high resolution ion mobility spectrometer for fast trace gas analysis,  Analyst, vol. 138, no. 18, pp. 5200-5207, 2013
DOI: 10.1039/C3AN00231D

A. Bohnhorst, A. Zygmanowski, Y. Yin, A.T. Kirk and S. Zimmermann (2022): How to run a drift tube IMS utilizing field induced fragmentation,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '22, p. 56, Memphis, USA, July 2022

A. Bohnhorst, C. Wendt, S. Zimmermann and A.T. Kirk (2022): Rauscharme Stromverstärker für die Ionenmobilitätsspektrometrie,  9th IMS Users’ Meeting, p. 33, Unna, Germany, March 2022

A. Bohnhorst, C. Wendt, S. Zimmermann and A.T. Kirk (2022): Low-noise current amplifiers for ion mobility spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '22, p. 86, Memphis, USA, July 2022

A. Nitschke, M. Hitzemann, A. Bohnhorst, A.T. Kirk and S. Zimmermann (2022): Duales Ionenmobilitätsspektrometer mit parallelen Driftröhren,  9th IMS Users’ Meeting, p. 32, Unna, Germany, March 2022

A.T. Kirk, A. Bohnhorst and S. Zimmermann (2022): Tristate ion shutters - An overview and guide,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '22, p. 64, Memphis, USA, July 2022

A.T. Kirk, M.J. Kueddelsmann, P.J. Faust, A. Nitschke, P. Boeker and S. Zimmermann (2022): Coupling ion mobility spectrometry to hyper-fast gas chromatography by using a flow-optimized ion source,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '22, p. 84, Memphis, USA, July 2022

C. Wendt, A. Bohnhorst, S. Zimmermann and A.T. Kirk (2022): Covering nine orders of magnitude from counts to gigacounts using only one capacitive ultra‐wide‐range current amplifier,  Conf. American Society for Mass Spectrometry - ASMS '22, Minneapolis, USA, June 2022

C. Wendt, A. Bohnhorst, S. Zimmermann and A.T. Kirk (2022): A Fast ultra-low noise current amplifier for flame ionization detectors,  Int. Symposium on Hyphenated Techniques in Chromatography and Separation Technology - HTC '22, p. 160, Gent, Belgium, May 2022

C. Wendt, A. Bohnhorst, S. Zimmermann and A.T. Kirk (2022): A fast, ultra-low noise current amplifier with linear range from femtoamperes to nanoamperes,  Sensoren und Messsysteme '18, ITG/GMA-Fachtagung, pp. 293-296, Nuremberg, Germany, May 2022

C.N. Naylor, C. Schaefer, A.T. Kirk and S. Zimmermann (2022): Determination of ionization mechanisms of aniline using a High-Kinetic Energy Ion Mobility Spectrometer (HiKE-IMS),  9th IMS Users’ Meeting, p. 30, Unna, Germany, March 2022

C.N. Naylor, C. Schaefer, V.D. Gandhi, A.T. Kirk, C. Larriba‐Andaluz, and S. Zimmermann (2022): Elucidating the ionization mechanism of aniline isomers by combining High‐Kinetic Energy Ion Mobility Spectrometry (HiKE‐IMS) with ion mobility simulations,  Conf. American Society for Mass Spectrometry - ASMS '22, Minneapolis, USA, June 2022

M. Hitzemann, A.T. Kirk, A. Bohnhorst, A. Nitschke and S. Zimmermann (2022): Plasma-Ionisationsquelle auf Basis von Leiterplatten für die Ionenmobilitätsspektrometrie,  9th IMS Users’ Meeting, p. 31, Unna, Germany, March 2022

M.J. Kueddelsmann, A.T. Kirk, T. Kobelt and Stefan Zimmermann (2022): Optimierung einer Ionenquelle für GC-IMS-Systeme durch Fokussierung des Probengasstroms,  9th IMS Users’ Meeting, p. 50, Unna, Germany, March 2022

A.T. Kirk, A. Bohnhorst and S. Zimmermann (2021): Analytical model for the signal-to-noise-ratio of drift tube ion mobility spectrometers,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '21, p. 40, July 2021 (virtual due to corona pandemic)

A.T. Kirk, M. Lippmann, M.J. Kueddelsmann and S. Zimmermann (2021): Improving sensitivity of ion mobility spectrometers with field switching ion shutters through an inhomogeneous injection grid structure,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '21, p. 80, July 2021 (virtual due to corona pandemic)

C. Schaefer, M. Allers, A.T. Kirk, F. Schlottmann, P. Wernicke and S. Zimmermann (2021): Untersuchungen zur Ionisation von aromatischen Kohlenwasserstoffen in einem Hochenergie-Ionenmobilitätsspektrometer (HiKE-IMS),  31. Doktorandenseminar Hohenroda, p. 9, January 2021 (virtual due to corona pandemic)

C. Wendt, A. Bohnhorst, S. Zimmermann and A.T. Kirk (2021): Demonstrating fast current measurement from femtoamperes to nanoamperes with an ultra-low noise current amplifier,  15. Dresdner Sensor-Symposium, pp. 276-279, Dresden, Germany, December 2021 (virtual due to corona pandemic)

F. Schlottmann, A.T. Kirk, A. Bohnhorst, M. Allers, C. Schaefer, S. Kehlenbeck, A. Schwarz, F. Ziegert-Kuehn, B. Ungethuem, A. Walte and S. Zimmermann (2021): Miniaturisierung eines Hochenergie-Ionenmobiltätsspektrometers (HiKE-IMS) für eine zukünftige mobile Vor-Ort-Analytik,  8th IMS Users’ Meeting, p. 27, Potsdam, Germany, March 2021 (virtual due to corona pandemic)

M. Hitzemann, A. Nitschke, A. Bohnhorst, A.T. Kirk and S. Zimmermann (2021): Miniaturized dual polarity ion mobility spectrometer utilizing parallel drift tubes,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '21, p. 82, July 2021 (virtual due to corona pandemic)

M. Hitzemann, M. Lippmann, A.T. Kirk, A. Bohnhorst and S. Zimmermann (2021): Miniaturized ultra-fast polarity switching ion mobility spectrometer,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '21, p. 81, July 2021 (virtual due to corona pandemic)

A. Bohnhorst, M. Hitzemann, M. Lippmann, A.T. Kirk and S. Zimmermann (2020): Enhanced resolving power by moving field ion mobility spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '20 (virtual due to corona pandemic), p. 27, July 2020

A. Bohnhorst, Y. Yin, A.T. Kirk and S. Zimmermann (2020): Kollisionsinduzierte Dissoziation in einem Ionenmobilitätsspektrometer mit integrierter Wechselfeldzone,  8th IMS Users’ Meeting, p. 17, Potsdam, Germany, March 2020 (proceedings published, meeting cancelled due to corona pandemic)

A.T. Kirk, C. Wendt and S. Zimmermann (2020): A fast ultra-low noise current amplifier with linear dynamic range from femtoamperes to nanoamperes,  Conf. American Society for Mass Spectrometry - ASMS '20 (virtual due to corona pandemic), June 2020

A.T. Kirk, M.J. Kueddelsmann, S. Zimmermann (2020): Improving ion mobility spectrometer sensitivity through an optimized sample gas flow,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '20 (virtual due to corona pandemic), p. 13-14, July 2020

C. Schaefer, M. Allers, A.T. Kirk, F. Schlottmann and S. Zimmermann (2020): Positive product ion formation of aromatic hydrocarbons in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '20 (virtual due to corona pandemic), p. 15-16, July 2020

F. Schlottmann, A.T. Kirk, A. Bohnhorst, M. Allers, C. Schaefer, S. Kehlenbeck, A. Schwarz, B. Ungethuem, F. Ziegert‐Kuehn, A. Walte and S. Zimmermann (2020): Compact HiKE‐IMS for quantitative trace gas detection in field applications,  Conf. American Society for Mass Spectrometry - ASMS '20 (virtual due to corona pandemic), June 2020

F. Schlottmann, A.T. Kirk, A. Bohnhorst, M. Allers, C. Schaefer, S. Kehlenbeck, A. Schwarz, F. Ziegert-Kuehn, B. Ungethuem, A. Walte and S. Zimmermann (2020): Miniaturisierung eines Hochenergie-Ionenmobiltätsspektrometers (HiKE-IMS) für eine zukünftige mobile Vor-Ort Analytik,  8th IMS Users’ Meeting, p. 16, Potsdam, Germany, March 2020 (proceedings published, meeting cancelled due to corona pandemic)

M. Allers, A.T. Kirk, B. Timke and S. Zimmermann (2020): Untersuchungen zur Bildung der negativ geladenen Reaktantionen in Hochenergie-Ionenmobilitätsspektrometern (HiKE-IMS),  8th IMS Users’ Meeting, p. 30, Potsdam, Germany, March 2020 (proceedings published, meeting cancelled due to corona pandemic)

M. Allers, A.T. Kirk, D. Erdogdu, R. Hillen, W. Wissdorf, T. Benter and S. Zimmermann (2020): Investigations on the formation of positive and negative reactant ions in High Kinetic Energy Ion Mobility Spectrometry (HiKE‐IMS) by HiKE‐IMS‐MS,  Conf. American Society for Mass Spectrometry - ASMS '20 (virtual due to corona pandemic), June 2020

M. Allers, A.T. Kirk, N. von Rossbitzky and S. Zimmermann (2020): Hochenergie-Ionenmobilitätsspektrometrie (HiKE-IMS) für die Untersuchung der Ionenchemie in der Gasphase,  30. Doktorandenseminar Hohenroda, p. 30, Hohenroda, Germany, January 2020

M. Hitzemann, A.T. Kirk, A. Bohnhorst, E. Sailer and S. Zimmermann (2020): Plasma ionization source for ion mobility spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '20 (virtual due to corona pandemic), p. 31, July 2020

M. Lippmann, A.T. Kirk, T. Kobelt and S. Zimmermann (2020): Kopplung von Gaschromatographie und hochsensitivem Doppelröhren-Ionenmobilitätsspektrometer für die Analyse komplexer Stoffgemische,  8th IMS Users’ Meeting, p. 46, Potsdam, Germany, March 2020 (proceedings published, meeting cancelled due to corona pandemic)

M. Lippmann, C. Rosin, C. Drees, W. Vautz, S. Liedtke, N. Kunze-Szikszay, T. Perl, M. Hitzemann, A.T. Kirk and Stefan Zimmermann (2020): Combining gas chromatography and dual polarity ion mobility spectrometry for rapid analysis of standard blood cultures,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '20 (virtual due to corona pandemic), p. 40-41, July 2020

A. Bohnhorst, A.T. Kirk, Y. Yin and S. Zimmermann (2019): FAT-IMS with collision-induced dissociation for improved compound identification,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 35, Hanover, Germany, July 2019

A.T. Kirk, M. Allers, F. Schlottmann, T. Kobelt, C. Schäfer and S. Zimmermann (2019): Ionenchemie in einem Hochenergie-Ionenmobilitätsspektrometer (HiKE-IMS),  29. Doktorandenseminar Hohenroda, p. 13, Hohenroda, Germany, January 2019

A.T. Kirk, T. Kobelt, M.J. Kueddelsmann, M. Lippmann and S. Zimmermann (2019): Combining fast gas chromatographic pre-separation with an ultrahigh sensitive dual polarity drift tube IMS,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 28, Hanover, Germany, July 2019

A.T. Kirk, T. Reinecke, C. Wendt, P. Kwantwi‐Barima, C. Thoben, B.H. Clowers and S. Zimmermann (2019): Improving ion mobility – mass spectrometry performance using a tristate ion shutter with extremely low ion discrimination,  Conf. American Society for Mass Spectrometry - ASMS '19, Atlanta, USA, June 2019

C. Schaefer, A.T. Kirk and S. Zimmermann (2019): Investigation of the mobility shift of isotopologues in a high kinetic energy ion mobility spectrometer,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 60, Hanover, Germany, July 2019

C.-R. Raddatz, M.G. Wagner, A.T. Kirk and Stefan Zimmermann (2019): Ion mobility of isotopologues of several alcohols and alkanes in ultrahigh-resolution ion mobility spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 63, Hanover, Germany, July 2019

F. Schlottmann, A.T. Kirk, A. Bohnhorst, M. Allers, S. Kehlenbeck, F. Ziegert-Kuehn, B. Ungethuem, A. Walte and S. Zimmermann (2019): Towards a hand-held High Kinetic Energy Ion Mobility Spectrometer (HiKE-IMS) for fast and quantitative trace compound detection,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 39, Hanover, Germany, July 2019

F. Stappert, D. Erdogdu, M. Allers, W. Wissdorf, A.T. Kirk, H. Kersten, S. Zimmermann and T. Benter (2019): Effects of physical and chemical interactions in ion mobility spectrometry (IMS) depending on the reduced field strengths,  Jahrestagung der Deutschen Gesellschaft für Massenspektrometrie - DGMS '19, p. 101, Rostock, Germany, March 2019

F. Stappert, M. Allers, D. Erdogdu, A.T. Kirk, W. Wissdorf, H. Kersten, S. Zimmermann and T. Benter (2019): Chemical modification and cluster dynamics in high kinetic energy IMS (HiKE‐IMS),  Conf. American Society for Mass Spectrometry - ASMS '19, Atlanta, USA, June 2019

M. Allers, A.T. Kirk, C. Schaefer and S. Zimmermann (2019): A study of the reactant ion population generated by corona discharge ionization in air using High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 66, Hanover, Germany, July 2019

M. Allers, A.T. Kirk, C. Schaefer and S. Zimmermann (2019): Investigation of ion-molecule interactions using High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  Int. Conference on Soft Chemical Ionization Mass Spectrometry - ICSCIMS '19, p. 73, Prague, Czech Republic, June 2019

M. Hitzemann, A.T. Kirk, A. Bohnhorst, M. Lippmann, F. Schlottmann and S. Zimmermann (2019): Improved electronics for a compact ultra-fast switching ion mobility spectrometer,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 72, Hanover, Germany, July 2019

M. Lippmann, A.T. Kirk, M. Hitzemann, F. Schlottmann and S. Zimmermann (2019): A high performance dual polarity ion mobility spectrometer with non-radioactive ionization source,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 74, Hanover, Germany, July 2019

S. Sguera, M. Troiani, A.T. Kirk, D. Kayser, T. Limero and S. Zimmermann (2019): Chemotype verification and contaminant monitoring of agricultural herbs using IMS with UV ionization,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 79, Hanover, Germany, July 2019

T. Kobelt, A.T. Kirk and S. Zimmermann (2019): Extending the Golay equation for coupling a gas chromatograph to a drift tube IMS,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '19, p. 64, Hanover, Germany, July 2019

A. Bohnhorst, A.T. Kirk and S. Zimmermann (2018): Separation and identification of explosives and chemical warfare agents with a field asymmetric time-of-flight ion mobility spectrometer,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '18, p. 28, Calgary, Canada, July 2018

A. Kirk, M. Allers and S. Zimmermann (2018): Measurement of protonated water clusters using high kinetic energy ion mobility spectrometry (HiKE-IMS),  International Mass Spectrometry Conference - IMSC '18, p. 950-951, Florence, Italy, August 2018

A.T. Kirk, M. Kueddelsmann and S. Zimmermann (2018): An optimized GC-IMS system with significantly increased sensitivity,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '18, p. 63, Calgary, Canada, July 2018

A.T. Kirk, T. Kobelt, M. Allers and S. Zimmermann (2018): A Study of protonated water clusters and isotopologues using a high resolution high kinetic energy ion mobility spectrometer (HiKE-IMS),  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '18, p. 54, Calgary, Canada, July 2018

A.T. Kirk, T. Last and S. Zimmermann (2018): Ultra-sensitive trace gas detection by gas chromatography-ion mobility spectrometry employing ionic liquid stationary phases,  International Symposium on Capillary Chromatography - ISCC '18, pp. 149, Riva del Garda, Italy, May 2018

C. Thoben, C.-R. Raddatz, A.T. Kirk and S. Zimmermann (2018): Compact high-resolution ESI-IMS for fast detection of trace water pollutants,  Sensoren und Messsysteme '18, ITG/GMA-Fachtagung, pp. 22-25, Nuremberg, Germany, June 2018

C. Thoben, C.-R. Raddatz, A.T. Kirk, C. Wendt and S. Zimmermann (2018): Charakterisierung eines kompakten ESI-IMS mit einem neuartigen Shutterprinzip,  28. Doktorandenseminar Hohenroda, p. 31, Hohenroda, Germany, January 2018

C.-R. Raddatz, A.T. Kirk and S. Zimmermann (2018): Separation of isomers with ultra-high-resolution ion mobility spectrometry,  International Mass Spectrometry Conference - IMSC '18, p. 1183-1185, Florence, Italy, August 2018

C.-R. Raddatz, A.T. Kirk and S. Zimmermann (2018): Ultra-high resolution ion mobility spectrometry for separation of isotopologues,  European Mass Spectrometry Conference - EMSC '18, p. 226, Saarbrücken, Germany, March 2018

D. Erdogdu, W. Wissdorf, F. Stappert, H. Kersten, T. Benter, A.T. Kirk, M. Allers, S. Zimmermann, B.B. Schneider and T. Covey (2018): Chemical kinetic and ion transport simulations: Temperature dependence of ion mobility and its impact on cluster equilibria,  Conf. American Society for Mass Spectrometry - ASMS '14, San Diego, USA, June 2018

E. Bunert, A.T. Kirk, N. Deutsch, M. Allers and S. Zimmermann (2018): Pulsed electron capture detector with non-radioactive electron source,  International Symposium on Capillary Chromatography - ISCC '18, pp. 287, Riva del Garda, Italy, May 2018

M. Allers, L. Timoumi, A.T. Kirk, F. Schlottmann and Stefan Zimmermann (2018): A high-resolution ion mobility spectrometer coupled to a time-of-flight mass spectrometer,  International Mass Spectrometry Conference - IMSC '18, p. 1164-1165, Florence, Italy, August 2018

A. Bohnhorst, A.T. Kirk and S. Zimmermann (2017): Introduction of a compact field asymmetric time of flight IMS,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '17, p. 57, Warsaw, Poland, July 2017

A.T. Kirk and S. Zimmermann (2017): Recent advances in ion mobility spectrometry,  International Symposium on Separation Sciences - ISSS '17, p. 116, Vienna, Austria, September 2017

A.T. Kirk and S. Zimmermann (2017): cv2alpha – Improved algorithm and software tool for extracting alpha coefficients,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '17, p. 50, Warsaw, Poland, July 2017

A.T. Kirk, D. Grube, C. Wendt and S. Zimmermann (2017): A high resolution high kinetic energy ion mobility spectrometer based on a non-discriminating ion shutter,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '17, p. 51, Warsaw, Poland, July 2017

A.T. Kirk, M. Hitzemann, A. Bohnhorst and S. Zimmermann (2017): Fast switching ion mobility spectrometer for simultaneous pptv-level detection of proton and electron affine compounds in gas chromatography,  International Symposium on Capillary Chromatography - ISCC '17, Fort Worth, USA, May 2017

C. Thoben, A.T. Kirk, C.-R. Raddatz, T.F. Koch, C. Wendt and S. Zimmermann (2017): An improved compact electrospray ionization ion mobility spectrometer with a novel shutter principle,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '17, p. 69, Warsaw, Poland, July 2017

C.-R. Raddatz, A.T. Kirk and S. Zimmermann (2017): Separation of Isotopologues in Ultra-High Resolution UV Ion Mobility Spectrometry,  27. Doktorandenseminar Hohenroda, p. 21, Hohenroda, Germany, January 2017

C.-R. Raddatz, A.T. Kirk and S. Zimmermann (2017): Separation of isotopologues in noble gas,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '17, p. 53, Warsaw, Poland, July 2017

E. Bunert, A.T. Kirk and S. Zimmermann (2017): An electron capture detector based on a non-radioactive electron source,  SENSOR '17, pp. 627-631, Nuremberg, Germany, May 2017

E. Bunert, A.T. Kirk, J. Oermann and S. Zimmermann (2017): Electron capture detector with non-radioactive electron source,  Eurosensors XXXI, vol. 1, no. 4, 443, Paris, France, September 2017

E. Bunert, A.T. Kirk, M. Allers, J. Oermann, N. Deutsch and S. Zimmermann (2017): Charakterisierung eines Elektroneneinfangdetektors mit nicht-radioaktiver Elektronenquelle,  13. Sensor-Symposium Dresden, pp. 40-44, Dresden, Germany, December 2017

E. Bunert, O. Kaebein, A.T. Kirk and S. Zimmermann (2017): Spatial ion distributions generated by different ionization sources,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '17, p. 31, Warsaw, Poland, July 2017

M. Hitzemann, A.T. Kirk, A. Bohnhorst and S. Zimmermann (2017): An ultra-fast switching and compact ion mobility spectrometer,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '17, p. 31, Warsaw, Poland, July 2017

A. Bohnhorst, A.T. Kirk and S. Zimmermann (2016): A miniaturized low-cost ion mobility spectrometer manufactured from printed circuit boards,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '16, Boston, USA, July 2016

A. Bohnhorst, A.T. Kirk, M. Allers and S. Zimmermann (2016): A miniaturized low-cost ion mobility spectrometer based on printed circuit boards,  6th IMS Users’ Meeting, pp. 52-53, Hanover, Germany, March 2016

A.T. Kirk and S. Zimmermann (2016): High kinetic energy ion mobility spectrometry (HiKE-IMS) for quantitative and selective trace gas detection,  European Society for Automatic Alarm Systems - Conference on New Perspectives for Fire Detection by Novel and Innovative Gas Sensing - EUSAS '16, Paderborn, Germany, September 2016

A.T. Kirk, C.-R. Raddatz and S. Zimmermann (2016): Ion mobility at ultra-high resolution and high reduced field strengths,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '16, Boston, USA, July 2016

A.T. Kirk, J. Langejuergen, M. Allers, J. Oermann and S. Zimmermann (2016): Detection of hard to ionize compounds with HiKE-IMS,  6th IMS Users’ Meeting, pp. 34-35, Hanover, Germany, March 2016

A.T. Kirk, M. Hitzemann, T. Neumann and S. Zimmermann (2016): An ultra-fast polarity switching ion mobility spectrometer,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '16, Boston, USA, July 2016

A.T. Kirk, T. Last and S. Zimmermann (2016): A highly sensitive GC detector based on dielectric barrier discharge ionization,  International Symposium on Capillary Chromatography - ISCC '16, pp. 166, Riva del Garda, Italy, May 2016

C. Thoben, T. Reinecke, A.T. Kirk, A. Ahrens, C.-R. Raddatz and S. Zimmermann (2016): A compact high-resolution ESI-IMS,  6th IMS Users’ Meeting, pp. 34-35, Hannover, Germany, March 2016

T. Reinecke, A.T. Kirk, D. Niebuhr, S, Böttger and S. Zimmermann (2016): High-resolution ion mobility spectrometer with x-ray ionization source,  6th IMS Users’ Meeting, pp. 60-61, Hanover, Germany, March 2016

A. Bohnhorst, A.T. Kirk, M. Allers and S. Zimmermann (2015): A low cost ion mobility spectrometer manufactured from printed circuit boards,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '15, Córdoba, Spain, July 2015

A.T. Kirk, J. Langejuergen, M. Allers, J. Oermann and S. Zimmermann (2015): Sensitive detection of benzene in the presence of interferents by high kinetic energy ion mobility spectrometry,  SENSOR '15, pp. 693-697, Nuremberg, Germany, May 2015

A.T. Kirk, J. Langejuergen, M. Allers, J. Oermann and S. Zimmermann (2015): Simultaneous detection of benzene, toluene and xylene and further advances in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS),  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '15, Córdoba, Spain, July 2015

A.T. Kirk, T. Last, J. Langejuergen and S. Zimmermann (2015): Sensitive detector for gas chromatography based on dielectric barrier discharge ionization,  12. Sensor-Symposium Dresden, pp. 26-30, Dresden, Germany, December 2015

E.G. Nazarov, J. Langejuergen, A.T. Kirk, M. Allers, J. Oermann and S. Zimmermann (2015): Comparison of alpha parameters obtained from DMS and HiKE-IMS: Fundamental considerations and experiments,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '15, Córdoba, Spain, July 2015

M. Allers, A. Bohnhorst, A.T. Kirk, B. Ungethuem, A. Walte and S. Zimmermann (2015): Transient simulation of moving ion clouds in a drift tube ion mobility spectrometer with superimposed AC fields,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '15, Córdoba, Spain, July 2015

T. Reinecke, A.T. Kirk, A. Ahrens, C. Raddatz and S. Zimmermann (2015): A compact high resolution electro spray ionization ion mobility spectrometer,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '15, Córdoba, Spain, July 2015

A. Kirk, D. Grube and S. Zimmermann (2014): A comparative study between stacked ring and resistive glass drift tubes for high resolution IMS,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '14, Asheville, USA, July 2014

A. Kirk, J. Langejuergen, M. Allers, J. Oermann and S. Zimmermann (2014): Direct sample ionization and separation using a High Kinetic Energy Ion Mobility Spectrometer (HiKE-IMS),  International Mass Spectrometry Conference - IMSC '14, p. 428, Geneva, Switzerland, August 2014

A. Kirk, P. Cochems and S. Zimmermann (2014): Pushing a compact high resolution drift tube IMS towards sub-ppt detection limits,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '14, Asheville, USA, July 2014

J. Langejuergen, M. Allers, J. Oermann, A. Kirk and S. Zimmermann (2014): High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) - Quantitative detection in IMS with direct sample inlets,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '14, Asheville, USA, July 2014

A. Kirk, M. Allers, P. Cochems, J. Langejuergen and S. Zimmermann (2013): Application of high resolution ion mobility spectrometers for fast trace gas analysis,  11. Sensor-Symposium Dresden, pp. 127-132, Dresden, Germany, December 2013

A. Kirk, M. Allers, P. Cochems, J. Langejuergen and S. Zimmermann (2013): Compact 10 cm long atmospheric pressure drift tube IMS with high resolution of R > 180 and ppt detection limits,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '13, Boppard, Germany, July 2013