Publikationen

A. Haack, C. Schaefer and S. Zimmermann (2024): On the arrival time distribution of reacting systems in ion mobility spectrometry,  Analytical Chemistry, vol. 96, no. 30, pp. 12433-12443, 2024
DOI: 10.1021/acs.analchem.4c02010

C. Schaefer, M. Allers, M. Hitzemann, A. Nitschke, T. Kobelt, M. Moertel, S. Schroeder, A. Ficks and S. Zimmermann (2024): Reliable detection of chemical warfare agents using High Kinetic Energy Ion Mobility Spectrometry,  J. of The American Society for Mass Spectrometry, vol. 35, no. 8, pp. 2008-2019, 2024
DOI: 10.1021/jasms.4c00240

C. Schaefer, M. Lippmann, C. Schindler, M. Beukers, N. Beijer, M. Hitzemann, B. van de Kamp, R. Peters, J. Knotter and S. Zimmermann (2024): Pursuing drug laboratories: Analysis of drug precursors with High Kinetic Energy Ion Mobility Spectrometry,  Forensic Science International, vol. 363, 112196/1-10, 2024
DOI: 10.1016/j.forsciint.2024.112196

A. Haack, C. Schaefer, S. Zimmermann and W.S. Hopkins (2023): Validation of field-dependent ion-solvent cluster modeling via direct measurement of cluster size distributions,  J. of The American Society for Mass Spectrometry, vol. 34, no. 6, pp. 1035-1046, 2023
DOI: 10.1021/jasms.3c00012

C. Schaefer, M. Lippmann, M. Beukers, N. Beijer, B. van de Kamp, J. Knotter and S. Zimmermann (2023): Detection of triacetone triperoxide by High Kinetic Energy Ion Mobility Spectrometry,  Analytical Chemistry, vol. 95, no. 46, pp. 17099−17107, 2023
DOI: 10.1021/acs.analchem.3c04101

C.N. Naylor, C. Schaefer and S. Zimmermann (2023): The dependence of reduced mobility, ion-neutral collisional cross sections, and alpha values on reduced electric field strengths in ion mobility,  Analyst, vol. 148, no. 15, pp. 3610-3621, 2023
DOI: 10.1039/D3AN00493G

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

F. Schlottmann, C. Schaefer, A.T. Kirk, A. Bohnhorst and S. Zimmermann (2023): A High Kinetic Energy Ion Mobility Spectrometer for operation at higher pressures of up to 60 mbar,  J. of The American Society for Mass Spectrometry, vol. 34, no. 5, pp. 893-904, 2023
DOI: 10.1021/jasms.2c00365

F. Weiss, C. Schaefer, S. Zimmermann, T.D. Maerk and C.A. Mayhew (2023): Revealing the ion chemistry occurring in High Kinetic Energy-Ion Mobility Spectrometry: a proof of principle study,  Analytica, vol. 4, no. 2, 113-125, 2023
DOI: 10.3390/analytica4020010

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

M. Sehlmeyer, M.B. Bhavsar, J. Biebighaeuser, M. Hitzemann, H. Maier, M. Lippmann, C. Schaefer and S. Zimmermann (2023): Impedance spectroscopy of enlarged cochlear implant stimulation electrodes – FEM simulations considering the perilymph,  tm – Technisches Messen, vol. 90, no. 12, pp. 809-821, 2023
DOI: 10.1515/teme-2023-0091

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

F. Weiss, C. Schaefer, V. Ruzsanyi, T. Maerk, G. Eiceman, C.A. Mayhew, and S. Zimmermann (2022): High Kinetic Energy Ion Mobility Spectrometry – Mass Spectrometry investigations of four inhalation anaesthetics: isoflurane, enflurane, sevoflurane and desflurane,  International Journal of Mass Spectrometry, vol. 475, 116831, 2022
DOI: 10.1016/j.ijms.2022.116831

F. Weiss, G. Eiceman, T.D. Maerk, C.A. Mayhew, V. Ruzsanyi, C. Schaefer and S. Zimmermann (2022): High kinetic energy ion mobility spectrometry-mass spectrometry investigations of several volatiles and their fully deuterated analogues,  The European Physical Journal D, vol. 76, no. 10, 181, 2022
DOI: 10.1140/epjd/s10053-022-00501-8

M. Allers, C. Schaefer, A. Ahrens, F. Schlottmann, M. Hitzemann, T. Kobelt, S. Zimmermann and R. Hetzer (2022): Detection of volatile toxic industrial chemicals with classical ion mobility spectrometry and high kinetic energy ion mobility spectrometry,  Analytical Chemistry, vol. 94, no. 2, pp. 1211-1220, 2022
DOI: 10.1021/acs.analchem.1c04397

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

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

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

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

A. Haack, P. Timmermann, C. Schaefer and S. Zimmermann (2025): Fragmentation mechanism of protonated primary alcohols in ion mobility – mass spectrometry (IM-MS),  Jahrestagung der Deutschen Gesellschaft für Massenspektrometrie - DGMS '25, p. 74, Göttingen, Germany, March 2025

C. Schaefer, C. Hellwig, J. Wuttke and S. Zimmermann (2025): Reaction rate coefficients of ion-molecule reactions: investigating the effect of effective temperature,  Jahrestagung der Deutschen Gesellschaft für Massenspektrometrie - DGMS '25, pp. 177-178, Göttingen, Germany, March 2025

A. Haack, C. Schaefer and S. Zimmermann (2024): Simulations of arrival time distributions of reacting systems in IMS,  10th IMS Users’ Meeting, pp. 30-31, Innsbruck, Austria, March 2024

A. Haack, C. Schaefer and S. Zimmermann (2024): Simulations of arrival time distributions of reacting systems in ion mobility spectrometry,  Jahrestagung der Deutschen Gesellschaft für Massenspektrometrie - DGMS '24, P108, Freising, Germany, March 2024

A. Haack, C. Schaefer and S. Zimmermann (2024): On the arrival time distribution of reacting systems in drift-tube ion mobility spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '24, p. 47, Miami Beach, USA, July 2024

C. Schaefer, M. Lippmann, C. Schindler, M. Hitzemann, M. Allers, A. Ficks, M. Beukers, N. Beijer, B. van de Kamp, J. Knotter and Stefan Zimmermann (2024): High Kinetic Energy Ion Mobility Spectrometry for security applications,  10th IMS Users’ Meeting, pp. 15-16, Innsbruck, Austria, March 2024

M. Lippmann, C. Schaefer, C. Schindler, N. Beijer, M. Beukers, M. Hitzemann, B. van de Kamp, J. Knotter and S. Zimmermann (2024): Detektion von Vorläuferstoffen der Drogensynthese mit einer Kopplung aus Gaschromatograph und Ionenmobilitätsspektrometer,  10th IMS Users’ Meeting, pp. 28-29, Innsbruck, Austria, March 2024

A. Haack, C. Schaefer and S. Zimmermann (2023): Ion-solvent clustering in ion mobility spectrometry – Modelling and applications,  DGMS Young Scientists '23, pp. 36-37, Hünfeld, Germany, September 2023

A. Haack, C. Schaefer, S. Hopkins and S. Zimmermann (2023): Ion clustering and transformation reactions during transit in the HiKE-IMS: comparing measurement and model,  Conf. American Society for Mass Spectrometry - ASMS '23, Minneapolis, USA, June 2023

A. Haack, C. Schaefer, W.S. Hopkins and S. Zimmermann (2023): First-principles modeling of ion mobility and ion chemistry in IMS devices,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '23, p. 68, Maastricht, The Netherlands, August 2023

C. Schaefer, F. Schlottmann and S. Zimmermann (2023): High Kinetic Energy Ion Mobility Spectrometry - A promising approach for fast and reliable detection of chemical warfare agents,  IEEE Sensors '23, 1163, Vienna, Austria, October 2023

C. Schaefer, M. Lippmann, C. Schindler, N. Beijer, M. Beukers, M. Hitzemann, B. van de Kamp, J. Knotter and S. Zimmermann (2023): Detection of precursors for drug synthesis using high-temperature High Kinetic Energy Ion Mobility Spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '23, p. 74, Maastricht, The Netherlands, August 2023

C. Schaefer, M. Lippmann, N. Beijer, M. Beukers, B. van de Kamp, J. Knotter and S. Zimmermann (2023): Detection of triacetone triperoxide (TATP) using High Kinetic Energy Ion Mobility Spectrometry,  DGMS Young Scientists '23, pp. 21-22, Hünfeld, Germany, September 2023

F. Schlottmann, C. Schaefer and S. Zimmermann (2023): Corona discharge ionization in High Kinetic Energy Ion Mobility Spectrometry at pressures between 20 and 60 mbar,  DGMS Young Scientists '23, pp. 61-62, Hünfeld, Germany, September 2023

M. Lippmann, C. Schaefer, C. Schindler, N. Beijer, M. Beukers, M. Hitzemann, B. van de Kamp, J. Knotter and S. Zimmermann (2023): Detection of precursors for drug synthesis using gas chromatography ion mobility spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '23, p. 90, Maastricht, The Netherlands, August 2023

M. Lippmann, C. Schaefer, N. Beijer, M. Beukers, B. van de Kamp, J. Knotter and S. Zimmermann (2023): Comparative study of triacetone triperoxide using high-temperature High Kinetic Energy Ion Mobility Spectrometry and gas chromatography ion mobility spectrometry,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '23, p. 89, Maastricht, The Netherlands, August 2023

C. Schaefer, C.N. Naylor, F. Schlottmann and S. Zimmermann (2022): Experimental determination of hydration enthalpies of gas‐phase ions with High Kinetic Energy Ion Mobility Spectrometry (HiKE‐IMS) based on equilibrium constants,  Conf. American Society for Mass Spectrometry - ASMS '22, Minneapolis, USA, June 2022

C. Schaefer, F. Schlottmann and S. Zimmermann (2022): Fragmentation of product ions in High Kinetic Energy Ion Mobility Spectrometry,  International Mass Spectrometry Conference - IMSC '22, pp. 316-317, IM-PA-135, Maastricht, The Netherlands, August 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

F. Schlottmann, A. Bohnhorst, C. Schaefer, F. Ziegert-Kuehn, B. Ungethuem, A. Walte and S. Zimmermann (2022): Hochenergie-Ionenmobilitätsspektrometer (HiKE-IMS) aus Leiterplatten und mit einem Betriebsdruck von bis zu 60 mbar für die schnelle vor-Ort-Analytik,  9th IMS Users’ Meeting, p. 26, Unna, Germany, March 2022

F. Schlottmann, C. Schaefer and S. Zimmermann (2022): Reactant ion population in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) at varying corona ionization source voltage and operating pressure,  International Mass Spectrometry Conference - IMSC '22, pp. 343-344, IM-PA-150, Maastricht, The Netherlands, August 2022

F. Schlottmann, C. Schaefer, C.N. Naylor and S. Zimmermann (2022): Reactant ion population in HiKE‐IMS at different corona ionization source voltages and operating pressures,  Conf. American Society for Mass Spectrometry - ASMS '22, Minneapolis, USA, June 2022

F. Weiss, C. Schaefer, V. Ruzsanyi. C.A. Mayhew and S. Zimmermann (2022): Untersuchung von Ionisationsprozessen deuterierter volatiler organischer Verbindungen mittels Hochenergie-Ionenmobilitätsspektrometrie (HiKE-IMS),  9th IMS Users’ Meeting, p. 52, Unna, Germany, March 2022

M. Allers, C. Schaefer, A. Ahrens, F. Schlottmann, M. Hitzemann, T. Kobelt, S. Zimmermann and A. Ficks (2022): Hochenergie-Ionenmobilitätsspektrometrie (HiKE-IMS) zur selektiven Vor-Ort-Detektion von toxischen Industriechemikalien,  9th IMS Users’ Meeting, p. 13, Unna, Germany, March 2022

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)

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)

F. Weiss, C. Schaefer, V. Ruzsanyi, C.A. Mayhew and S. Zimmermann (2021): High Kinetic Energy Ion Mobility Spectrometry–Mass Spectrometry investigations of four inhalation anesthetics,  Conf. Int. Society of Ion Mobility Spectrometry - ISIMS '21, p. 28, July 2021 (virtual due to corona pandemic)

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)

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

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