PhD Student in physical chemistry of the atmosphere
Join to apply for the PhD Student in physical chemistry of the atmosphere role at Swiss Light Source
04.11.2025
Overview
The Paul Scherrer Institute PSI is the largest research institute for natural and engineering sciences within Switzerland. This SNF‑funded project investigates acid‑base chemistry and hydrogen bonding at ice‑ and water‑air interfaces. Building on our expertise in probing the adsorption of acidic trace gases to ice using Near Ambient Pressure X‑ray Photoemission and X‑ray absorption spectroscopy, we now seek to develop a predictive understanding of ammonia chemistry in the cryosphere and upper troposphere.
Responsibilities
* Your research will explore the mechanisms of ammonia (NH₃) adsorption and interfacial proton transfer, focusing on how these processes are influenced by acidic adsorbents (CO₂, HONO, HNO₃), mineral oxides, and reactive trace gases (NO₂, SO₂, O₃).
* A central aim is to investigate molecular‑level differences between air‑water and air‑ice interfaces.
* You will design and conduct experiments using coated wall flow‑tube reactors, X‑ray excited electron spectroscopy at the Swiss Light Source, and sum‑frequency generation spectroscopy in collaboration with Boise State University.
Qualifications
* Brilliant, creative, and motivated – even if your previous research didn’t focus on interfaces, snow, or atmospheric science.
* Hold a master’s degree in physical chemistry, chemical physics, or a closely related discipline.
* Talented experimentalist or experienced with analytical field campaigns.
* Curious about molecular‑level interfacial processes and eager to develop a predictive understanding.
* A strong communicator in English, able to present results in high‑impact journals and at international conferences.
* Experience in low‑temperature experiments, spectroscopic methods, and programming for data analysis is beneficial.
Benefits
Our institution is based on an interdisciplinary, innovative and dynamic collaboration. You will profit from systematic training on the job, personal development possibilities and our pronounced vocational training culture. Modern employment conditions, on‑site infrastructure and support for work‑family balance are available.
Apply
For further information, please contact Dr. Thorsten Bartels‑Rausch, phone +41 56 310 43 01.
Please submit your application online by 31 December 2025 (including a motivation letter and addresses of referees) for the position as a PhD Student (Index‑Nr. 5505‑25377).
Paul Scherrer Institute, Human Resources Management, Mariusz Prus, 5232 Villigen PSI, Switzerland
Seniority level
Internship
Employment type
Internship
Job function
Education and Training; Research Services
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