Curiosity drives my research in the laboratory to gain a fundamental understanding of ice and snow chemistry. This topic is timely, as it addresses key environmental issues, such as winter haze in densely populated regions of Asia and the Arctic. The focus lies on the interfacial physical chemistry of ice and on the fate and chemistry of nanometer-sized aerosol deposits in snow. Beyond its environmental relevance, the understudied chemistry in the cold shows fascinating deviations from textbook knowledge that address fundamental chemistry topics of general interest, such as interfacial acid-base chemistry, chemical systems with low liquid water content, and the hydrogen bonding network at the air-ice and air-water interface.
Science isn’t a solitary genius endeavor — I'm grateful for the dedication of former PhD students and postdocs and our ever-constructive research group and laboratory. Fruitful discussions with international scientists such as the CATCH and BEPSII communities continually spark and fuel my research.
- 2022 University of California Los Angeles (UCLA), Sabbatical
- 2006 - present Paul Scherrer Institut PSI Scientist
- 2006 parental leave
- 2004 - 2006 Neue Zürcher Zeitung freelance science writer
- 2004 - 2005 University of Toronto PostDoc
- 2004 parental leave
- 1999-2003 Paul Scherrer Institut PSI graduate student
- 1999 - 2003 Universität Bern, Dr. phil.-nat.
- 1995 - 1999 ETH Zürich, Dipl. Chem. ETH
- 1996 - 1997 Norwegian University of Science and Technology Trondheim (NTNU)
- 1993 - 1995 Julius-Maximilians-Universität Würzburg, Vordiplom
- Francesca Salteri, Ph.D. Student at ETH Zürich
- Juan Felipe Flórez Ospina, PostDoc, 2023
- Luca Longetti, PostDoc, 2023-2024
- Yanisha Manoharan, Ph.D. student at ETH Zürich, 2019-2023
- Jérôme Gabathuler, Ph.D. student at ETH Zürich, 2018-2022
- Xiangrui Kong, PostDoc, 2015-2017
- Jacinta Edebeli, Ph.D. student at ETH Zürich, 2015-2019
- Astrid Waldner, Ph.D. student at ETH Zürich, 2014-2017
- Thomas Ulrich, Ph.D. student at University of Bern, 2009-2013
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          Bartels-Rausch T, Creamean J, Thomas JL, Willis M, Zieger P
 Ten crucial unknowns in atmospheric chemistry in the cold
 Faraday Discussions. 2025; 258: 10-22. https://doi.org/10.1039/d5fd00056d
 DORA PSI
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          Thomas JL, Stutz J, Frey MM, Bartels-Rausch T, Altieri K, Baladima F, et al.
 Fostering multidisciplinary research on interactions between chemistry, biology, and physics within the coupled cryosphere-atmosphere system
 Elementa: Science of the Anthropocene. 2019; 7(1): 58 (16 pp.). https://doi.org/10.1525/elementa.396
 DORA PSI
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          Ammann M, Artiglia L, Bartels-Rausch T
 X-Ray excited electron spectroscopy to study gase-liquid interfaces of atmospheric relevance
 In: Faust JA, House JE, eds. Physical chemistry of gas-liquid interfaces. Developments in physical & theoretical chemistry. Amsterdam: Elsevier; 2018:135-166. https://doi.org/10.1016/B978-0-12-813641-6.00006-6
 DORA PSI
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          Bartels-Rausch T, Jacobi H-W, Kahan TF, Thomas JL, Thomson ES, Abbatt JPD, et al.
 A review of air-ice chemical and physical interactions (AICI): liquids, quasi-liquids, and solids in snow
 Atmospheric Chemistry and Physics. 2014; 14(3): 1587-1633. https://doi.org/10.5194/acp-14-1587-2014
 DORA PSI
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          Bartels-Rausch T
 Ten things we need to know about ice and snow
 Nature. 2013; 494(7435): 27-29. https://doi.org/10.1038/494027a
 DORA PSI
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          Bartels-Rausch T, Creamean J, Thomas JL, Willis M, Zieger P
 Ten crucial unknowns in atmospheric chemistry in the cold
 Faraday Discussions. 2025; 258: 10-22. https://doi.org/10.1039/d5fd00056d
 DORA PSI
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          Chen S, Abouhaidar R, Artiglia L, Yang H, Boucly A, Iezzi L, et al.
 Influence of surfactants with differently charged headgroups on the surface propensity of bromide
 Journal of Physical Chemistry A. 2025; 129(13): 3085-3097. https://doi.org/10.1021/acs.jpca.4c07539
 DORA PSI
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          Kuhn J, Stutz J, Bartels-Rausch T, Thomas JL, Cesler-Maloney M, Simpson WR, et al.
 The interplay between snow and polluted air masses in cold urban environments
 Faraday Discussions. 2025; 258: 502-520. https://doi.org/10.1039/d4fd00176a
 DORA PSI
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          Richter C, Gholami S, Manoharan Y, Buttersack T, Longetti L, Artiglia L, et al.
 Uptake of ammonia by ice surfaces at atmospheric temperatures
 Faraday Discussions. 2025; 258: 532-545. https://doi.org/10.1039/d4fd00169a
 DORA PSI
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          Ammann M, Alpert PA, Artiglia L, Bao F, Bartels-Rausch T, Ospina JFF, et al.
 Multiphase chemistry in the atmosphere
 Chimia. 2024; 78(11): 754-761. https://doi.org/10.2533/chimia.2024.754
 DORA PSI
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          Fauré N, Chen J, Artiglia L, Ammann M, Bartels-Rausch T, Kanji ZA, et al.
 Formation of sodium chloride on the surface of sulfate-rich gobi desert salt in response to water adsorption
 ACS ES&T Air. 2024; 1(11): 1373-1382. https://doi.org/10.1021/acsestair.4c00092
 DORA PSI
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          Bartels-Rausch T, Ammann M
 It is time to introduce the next generation of chemists to FAIR and open science
 Chimia. 2023; 77(10): 694-696. https://doi.org/10.2533/chimia.2023.694
 DORA PSI
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          Bartels-Rausch T, Gabathuler JP, Yang H, Manoharan Y, Artiglia L, Ammann M
 Removing gas-phase features in near ambient pressure partial Auger-Meitner electron yield oxygen K-edge NEXAFS spectra
 Journal of Electron Spectroscopy and Related Phenomena. 2023; 264: 147320 (7 pp.). https://doi.org/10.1016/j.elspec.2023.147320
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          Fauré N, Chen J, Artiglia L, Ammann M, Bartels-Rausch T, Li J, et al.
 Unexpected behavior of chloride and sulfate ions upon surface solvation of Martian salt analogue
 ACS Earth and Space Chemistry. 2023; 7(2): 350-359. https://doi.org/10.1021/acsearthspacechem.2c00204
 DORA PSI
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          Hong AC, Ulrich T, Thomson ES, Trachsel J, Riche F, Murphy JG, et al.
 Uptake of hydrogen peroxide from the gas phase to grain boundaries: a source in snow and ice
 Environmental Science and Technology. 2023; 57(31): 11626-11633. https://doi.org/10.1021/acs.est.3c01457
 DORA PSI
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          Kong X, Gladich I, Fauré N, Thomson ES, Chen J, Artiglia L, et al.
 Adsorbed water promotes chemically active environments on the surface of sodium chloride
 Journal of Physical Chemistry Letters. 2023; 14(26): 6151-6156. https://doi.org/10.1021/acs.jpclett.3c00980
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          Mallet MD, Humphries RS, Fiddes SL, Alexander SP, Altieri K, Angot H, et al.
 Untangling the influence of Antarctic and Southern Ocean life on clouds
 Elementa: Science of the Anthropocene. 2023; 11(1): 00130 (18 pp.). https://doi.org/10.1525/elementa.2022.00130
 DORA PSI
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          Bartels-Rausch T, Kong X, Orlando F, Artiglia L, Waldner A, Huthwelker T, et al.
 Interfacial supercooling and the precipitation of hydrohalite in frozen NaCl solutions as seen by X-ray absorption spectroscopy
 Cryosphere. 2021; 15(4): 2001-2020. https://doi.org/10.5194/tc-15-2001-2021
 DORA PSI
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          Yang H, Boucly A, Gabathuler JP, Bartels-Rausch T, Artiglia L, Ammann M
 Ordered hydrogen bonding structure of water molecules adsorbed on silver iodide particles under subsaturated conditions
 Journal of Physical Chemistry C. 2021; 125(21): 11628-11635. https://doi.org/10.1021/acs.jpcc.1c01767
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          Edebeli J, Trachsel JC, Avak SE, Ammann M, Schneebeli M, Eichler A, et al.
 Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism
 Atmospheric Chemistry and Physics. 2020; 20(21): 13443-13454. https://doi.org/10.5194/acp-20-13443-2020
 DORA PSI
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          Kong X, Castarède D, Boucly A, Artiglia L, Ammann M, Bartels-Rausch T, et al.
 Reversibly physisorbed and chemisorbed water on carboxylic salt surfaces under atmospheric conditions
 Journal of Physical Chemistry C. 2020; 124(9): 5263-5269. https://doi.org/10.1021/acs.jpcc.0c00319
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          Avak SE, Trachsel JC, Edebeli J, Brütsch S, Bartels‐Rausch T, Schneebeli M, et al.
 Melt‐induced fractionation of major ions and trace elements in an Alpine snowpack
 Journal of Geophysical Research: Earth Surface. 2019; 124(7): 1647-1657. https://doi.org/10.1029/2019JF005026
 DORA PSI
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          Bartels-Rausch T, Montagnat M
 The physics and chemistry of ice
 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2019; 377(2146): 20190138 (5 pp.). https://doi.org/10.1098/rsta.2019.0138
 DORA PSI
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          Edebeli J, Ammann M, Bartels-Rausch T
 Microphysics of the aqueous bulk counters the water activity driven rate acceleration of bromide oxidation by ozone from 289–245 K
 Environmental Science: Processes and Impacts. 2019; 21(1): 63-73. https://doi.org/10.1039/C8EM00417J
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          Orlando F, Artiglia L, Yang H, Kong X, Roy K, Waldner A, et al.
 Disordered adsorbed water layers on TiO2 nanoparticles under subsaturated humidity conditions at 235 K
 Journal of Physical Chemistry Letters. 2019; 10(23): 7433-7438. https://doi.org/10.1021/acs.jpclett.9b02779
 DORA PSI
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          Thomas JL, Stutz J, Frey MM, Bartels-Rausch T, Altieri K, Baladima F, et al.
 Fostering multidisciplinary research on interactions between chemistry, biology, and physics within the coupled cryosphere-atmosphere system
 Elementa: Science of the Anthropocene. 2019; 7(1): 58 (16 pp.). https://doi.org/10.1525/elementa.396
 DORA PSI
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          Trachsel JC, Avak SE, Edebeli J, Schneebeli M, Bartels-Rausch T, Bruetsch S, et al.
 Microscale rearrangement of ammonium induced by snow metamorphism
 Frontiers in Earth Science. 2019; 7: 194 (19 pp.). https://doi.org/10.3389/feart.2019.00194
 DORA PSI
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          Ammann M, Artiglia L, Bartels-Rausch T
 X-Ray excited electron spectroscopy to study gase-liquid interfaces of atmospheric relevance
 In: Faust JA, House JE, eds. Physical chemistry of gas-liquid interfaces. Developments in physical & theoretical chemistry. Amsterdam: Elsevier; 2018:135-166. https://doi.org/10.1016/B978-0-12-813641-6.00006-6
 DORA PSI
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          Corral Arroyo P, Bartels-Rausch T, Alpert PA, Dumas S, Perrier S, George C, et al.
 Particle-phase photosensitized radical production and aerosol aging
 Environmental Science and Technology. 2018; 52(14): 7680-7688. https://doi.org/10.1021/acs.est.8b00329
 DORA PSI
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          Kong X, Wolf MJ, Roesch M, Thomson ES, Bartels-Rausch T, Alpert PA, et al.
 A continuous flow diffusion chamber study of sea salt particles acting as cloud nuclei: deliquescence and ice nucleation
 Tellus, Series B: Chemical and Physical Meteorology. 2018; 70(1): 1463806 (11 pp.). https://doi.org/10.1080/16000889.2018.1463806
 DORA PSI
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          Waldner A, Artiglia L, Kong X, Orlando F, Huthwelker T, Ammann M, et al.
 Pre-melting and the adsorption of formic acid at the air-ice interface at 253 K as seen by NEXAFS and XPS
 Physical Chemistry Chemical Physics. 2018; 20(37): 24408-24417. https://doi.org/10.1039/C8CP03621G
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          Artiglia L, Edebeli J, Orlando F, Chen S, Lee M-T, Corral Arroyo P, et al.
 A surface-stabilized ozonide triggers bromide oxidation at the aqueous solution-vapour interface
 Nature Communications. 2017; 8(1): 700 (8 pp.). https://doi.org/10.1038/s41467-017-00823-x
 DORA PSI
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          Barsotti F, Bartels-Rausch T, De Laurentiis E, Ammann M, Brigante M, Mailhot G, et al.
 Photochemical formation of nitrite and nitrous acid (HONO) upon irradiation of nitrophenols in aqueous solution and in viscous secondary organic aerosol proxy
 Environmental Science and Technology. 2017; 51(13): 7486-7495. https://doi.org/10.1021/acs.est.7b01397
 DORA PSI
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          Bartels-Rausch T, Orlando F, Kong X, Artiglia L, Ammann M
 Experimental evidence for the formation of solvation shells by soluble species at a nonuniform air-ice interface
 ACS Earth and Space Chemistry. 2017; 1(9): 572-579. https://doi.org/10.1021/acsearthspacechem.7b00077
 DORA PSI
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          Gržinić G, Bartels-Rausch T, Türler A, Ammann M
 Efficient bulk mass accommodation and dissociation of N2O5 in neutral aqueous aerosol
 Atmospheric Chemistry and Physics. 2017; 17(10): 6493-6502. https://doi.org/10.5194/acp-17-6493-2017
 DORA PSI
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          Kong X, Waldner A, Orlando F, Artiglia L, Huthwelker T, Ammann M, et al.
 Coexistence of physisorbed and solvated HCl at warm ice surfaces
 Journal of Physical Chemistry Letters. 2017; 8(19): 4757-4762. https://doi.org/10.1021/acs.jpclett.7b01573
 DORA PSI
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          Meusel H, Elshorbany Y, Kuhn U, Bartels-Rausch T, Reinmuth-Selzle K, Kampf CJ, et al.
 Light-induced protein nitration and degradation with HONO emission
 Atmospheric Chemistry and Physics. 2017; 17(19): 11819-11833. https://doi.org/10.5194/acp-17-11819-2017
 DORA PSI
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          González Palacios L, Corral Arroyo P, Aregahegn KZ, Steimer SS, Bartels-Rausch T, Nozière B, et al.
 Heterogeneous photochemistry of imidazole-2-carboxaldehyde: HO2 radical formation and aerosol growth
 Atmospheric Chemistry and Physics. 2016; 16(18): 11823-11836. https://doi.org/10.5194/acp-16-11823-2016
 DORA PSI
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          Orlando F, Waldner A, Bartels-Rausch T, Birrer M, Kato S, Lee M-T, et al.
 The environmental photochemistry of oxide surfaces and the nature of frozen salt solutions: a new in situ XPS approach
 Topics in Catalysis. 2016; 59(5-7): 591-604. https://doi.org/10.1007/s11244-015-0515-5
 DORA PSI
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          Gržinić G, Bartels-Rausch T, Berkemeier T, Türler A, Ammann M
 Viscosity controls humidity dependence of N2O5 uptake to citric acid aerosol
 Atmospheric Chemistry and Physics. 2015; 15(23): 13615-13625. https://doi.org/10.5194/acp-15-13615-2015
 DORA PSI
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          Bartels-Rausch T, Jacobi H-W, Kahan TF, Thomas JL, Thomson ES, Abbatt JPD, et al.
 A review of air-ice chemical and physical interactions (AICI): liquids, quasi-liquids, and solids in snow
 Atmospheric Chemistry and Physics. 2014; 14(3): 1587-1633. https://doi.org/10.5194/acp-14-1587-2014
 DORA PSI
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          George C, D'Anna B, Herrmann H, Weller C, Vaida V, Donaldson DJ, et al.
 Emerging areas in atmospheric photochemistry
 In: McNeill VF, Ariya PA, eds. Atmospheric and aerosol chemistry. Topics in current chemistry. Berlin Heidelberg: Srpinger; 2014:1-53. https://doi.org/10.1007/128_2012_393
 DORA PSI
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          Gržinić G, Bartels-Rausch T, Birrer M, Türler A, Ammann M
 Production and use of 13N labeled N2O5 to determine gas-aerosol interaction kinetics
 Radiochimica Acta. 2014; 102(11): 1025-1034. https://doi.org/10.1515/ract-2014-2244
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          Legrand M, Preunkert S, Frey M, Bartels-Rausch T, Kukui A, King MD, et al.
 Large mixing ratios of atmospheric nitrous acid (HONO) at Concordia (East Antarctic Plateau) in summer: a strong source from surface snow?
 Atmospheric Chemistry and Physics. 2014; 14(18): 9963-9976. https://doi.org/10.5194/acp-14-9963-2014
 DORA PSI
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          Bartels-Rausch T, Wren SN, Schreiber S, Riche F, Schneebeli M, Ammann M
 Diffusion of volatile organics through porous snow: impact of surface adsorption and grain boundaries
 Atmospheric Chemistry and Physics. 2013; 13(14): 6727-6739. https://doi.org/10.5194/acp-13-6727-2013
 DORA PSI
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          Bartels-Rausch T
 Ten things we need to know about ice and snow
 Nature. 2013; 494(7435): 27-29. https://doi.org/10.1038/494027a
 DORA PSI
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          Křepelová A, Bartels-Rausch T, Brown MA, Bluhm H, Ammann M
 Adsorption of acetic acid on ice studied by ambient-pressure XPS and partial-electron-yield NEXAFS spectroscopy at 230-240 K
 Journal of Physical Chemistry A. 2013; 117(2): 401-409. https://doi.org/10.1021/jp3102332
 DORA PSI
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          Bartels-Rausch T, Schneebeli M
 Comment on 'Possible contribution of triboelectricity to snow-air interactions'
 Environmental Chemistry. 2012; 9(2): 119-120. https://doi.org/10.1071/EN11147
 DORA PSI
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          Bartels-Rausch T, Bergeron V, Cartwright JHE, Escribano R, Finney JL, Grothe H, et al.
 Ice structures, patterns, and processes: a view across the icefields
 Reviews of Modern Physics. 2012; 84(2): 885-944. https://doi.org/10.1103/RevModPhys.84.885
 DORA PSI
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          Donaldson DJ, Ammann M, Bartels-Rausch T, Pöschl U
 Standard states and thermochemical kinetics in heterogeneous atmospheric chemistry
 Journal of Physical Chemistry A. 2012; 116(24): 6312-6316. https://doi.org/10.1021/jp212015g
 DORA PSI
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          McNeill VF, Grannas AM, Abbatt JPD, Ammann M, Ariya P, Bartels-Rausch T, et al.
 Organics in environmental ices: sources, chemistry, and impacts
 Atmospheric Chemistry and Physics. 2012; 12(20): 9653-9678. https://doi.org/10.5194/acp-12-9653-2012
 DORA PSI
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          Riche F, Bartels-Rausch T, Schreiber S, Ammann M, Schneebeli M
 Temporal evolution of surface and grain boundary area in artificial ice beads and implications for snow chemistry
 Journal of Glaciology. 2012; 58(210): 815-817. https://doi.org/10.3189/2012JoG12J058
 DORA PSI
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          Ulrich T, Ammann M, Leutwyler S, Bartels-Rausch T
 The adsorption of peroxynitric acid on ice between 230 K and 253 K
 Atmospheric Chemistry and Physics. 2012; 12(4): 1833-1845. https://doi.org/10.5194/acp-12-1833-2012
 DORA PSI
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          Bartels-Rausch T, Ulrich T, Huthwelker T, Ammann M
 A novel synthesis of the N-13 labeled atmospheric trace gas peroxynitric acid
 Radiochimica Acta. 2011; 99(5): 285-292. https://doi.org/10.1524/ract.2011.1830
 DORA PSI
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          Bartels-Rausch T, Krysztofiak G, Bernhard A, Schläppi M, Schwikowski M, Ammann M
 Photoinduced reduction of divalent mercury in ice by organic matter
 Chemosphere. 2011; 82(2): 199-203. https://doi.org/10.1016/j.chemosphere.2010.10.020
 DORA PSI
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          Sosedova Y, Rouvière A, Bartels-Rausch T, Ammann M
 UVA/Vis-induced nitrous acid formation on polyphenolic films exposed to gaseous NO2
 Photochemical and Photobiological Sciences. 2011; 10(10): 1680-1690. https://doi.org/10.1039/c1pp05113j
 DORA PSI
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          Bartels-Rausch T, Brigante M, Elshorbany YF, Ammann M, D'Anna B, George C, et al.
 Humic acid in ice: photo-enhanced conversion of nitrogen dioxide into nitrous acid
 Atmospheric Environment. 2010; 44(40): 5443-5450. https://doi.org/10.1016/j.atmosenv.2009.12.025
 DORA PSI
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          Kerbrat M, Huthwelker T, Bartels-Rausch T, Gäggeler HW, Ammann M
 Co-adsorption of acetic acid and nitrous acid on ice
 Physical Chemistry Chemical Physics. 2010; 12(26): 7194-7202. https://doi.org/10.1039/b924782c
 DORA PSI
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          Bartels-Rausch T, Huthwelker T, Jöri M, Gäggeler H, Ammann M
 Interaction of gaseous elemental mercury with snow surfaces: laboratory investigation
 Environmental Research Letters. 2008; 3(4): 045009 (5 pp.). https://doi.org/10.1088/1748-9326/3/4/045009
 DORA PSI
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          Clifford D, Bartels-Rausch T, Donaldson DJ
 Suppression of aqueous surface hydrolysis by monolayers of short chain organic amphiphiles
 Physical Chemistry Chemical Physics. 2007; 9(11): 1362-1369. https://doi.org/10.1039/b617079j
 DORA PSI
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          Bartels-Rausch T, Huthwelker T, Gäggeler HW, Ammann M
 Atmospheric pressure coated-wall flow-tube study of acetone adsorption on ice
 Journal of Physical Chemistry A. 2005; 109(20): 4531-4539. https://doi.org/10.1021/jp045187l
 DORA PSI
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          Bartels-Rausch T, Guimbaud C, Gäggeler HW, Ammann M
 The partitioning of acetone to different types of ice and snow between 198 and 223 K
 Geophysical Research Letters. 2004; 31(16): L16110 (4 pp.). https://doi.org/10.1029/2004GL020070
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          Guimbaud C, Bartels-Rausch T, Ammann M
 An atmospheric pressure chemical ionization mass spectrometer (APCI-MS) combined with a chromatographic technique to measure the adsorption enthalpy of acetone on ice
 International Journal of Mass Spectrometry. 2003; 226(2): 279-290. https://doi.org/10.1016/S1387-3806(03)00019-8
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          Bartels-Rausch T, Eichler B, Zimmermann P, Gäggeler HW, Ammann M
 The adsorption enthalpy of nitrogen oxides on crystalline ice
 Atmospheric Chemistry and Physics. 2002; 2(3): 235-247. https://doi.org/10.5194/acp-2-235-2002
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