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APXPS & Chemical Sciences Program

The Ambient-Pressure X-Ray Photoelectron Spectroscopy (APXPS) & Chemical Sciences Program comprises various beamlines and endstations to probe interfacial elemental, chemical, and potential information at solid/gas, solid/liquid, solid/solid, and liquid/vapor interfaces under in situ and operando conditions.

Beamline 11.0.2.1 has an insertion device and 9.3.2 has a bend magnet providing our program’s soft x-ray energies (90–2000 eV and 200–900 eV, respectively), an ideal energy range for probing solid/gas and liquid/vapor interfaces. While 9.3.2 is best suited for conventional solid/gas measurements, 11.0.2.1 supports two multimodal endstations, LARaXS and APPEXS to probe interfaces using APXPS and RIXS, and APXPS and scattering, respectively.

Beamline 9.3.1 is a tender x-ray bend-magnet beamline providing tender x-ray energies between 2100–6000 eV and has an ideal energy range for probing solid/liquid and solid/solid interfaces.

Beamlines 9.0.1 and 9.0.2 share the same insertion device. Beamline 9.0.1 provides soft x-ray radiation (20–800 eV) and accommodates mobile endstations and has a new multimodal solid/gas interface endstation for time-resolved measurements under development. Beamline 9.0.2 delivers vacuum ultraviolet (VUV) radiation (7.4–25 eV), making it ideal for investigating gas-phase species.

Collectively, this program is looking to reveal interfacial chemical properties to provide insight into a wide range of sciences, including energy science, earth and environmental science, materials science, chemical science, applied science, and physical science.

Beamlines

Personnel

ALS Staff

Ethan Crumlin

Staff Scientist, Program Lead

Monika Blum

Staff Scientist

Oleg Kostko

Research Scientist

Slavomir Nemsak

Staff Scientist

Michael Nguyen

Scientific Engineering Associate

Doctoral and Postdoctoral Researchers

  • Shane Devlin
    ALS Collaborative Postdoctoral Fellow (2023-2025), Berkeley Lab

  • Nureshan Diaz
    Postdoctoral Researcher (2022-2026), Chemical Sciences Division, Berkeley Lab
    VUV photoionization mass spectrometry of gas-phase clusters and hot nozzle experiment

  • Rebecca Hamlyn
    Postdoctoral Researcher (2021-2025), ALS and Chemical Sciences Division, Berkeley Lab

  • Aaron Kaufman
    Postdoctoral Researcher (2025- ), ALS and Chemical Sciences Division, Berkeley Lab
    DOE SCGSR Doctoral Fellow (2023-2024)

  • Dongwoo Kim
    ALS Collaborative Posdoctoral Fellow (2024-2025), Berkeley Lab

  • Pyeongeun Kim
    Postdoctoral Researcher (2022-2025), Chemical Sciences Division, Berkeley Lab
    Heterogeneous reactions on organic aerosols

  • Sander Lemmens
    Postdoctoral Researcher (2022-2026), Chemical Sciences Division, Berkeley Lab
    VUV photoionization mass spectrometry of gas-phase clusters and hot nozzle experiment

  • Haoyi Li
    Postdoctoral Researcher (2023-2025), ALS and Chemical Sciences Division, Berkeley Lab

  • Jay Paudel
    Postdoctoral Researcher (2024-2026), ALS and Chemical Sciences Division, Berkeley Lab

  • Alexander Prophet
    Postdoctoral Researcher (2024-2025), ALS and Chemical Sciences Division, Berkeley Lab

  • Andreas Siebert
    Postdoctoral Researcher (2021-2025), ALS Chemical Sciences Division, Berkeley Lab

  • Sorren Warkander
    Postdoctoral Researcher (2023-2027), Chemical Sciences Division, Berkeley Lab
    Soft x-ray spectroscopy of aerosols

Program Alumni

  • Pinar Aydogan Gokturk, Assistant Professor, Koc University, Turkey; Affiliate Faculty, ALS
    Postdoctoral Researcher (2019-2022)

  • Mikayla Barry, Scientist, The Clorox Company
    ALS Doctoral Fellow in Residence (2019-2021), UC Santa Barbara

  • Progna Banerjee, EBI-Shell
    Postdoctoral Researcher (2019-2020), University of Texas at Austin

  • Caroline Bavasso
    Student Assistant (2019), University of Burgundy

  • Marissa Beatty, Founder of Turnover Labs
    DOE SCGSR Doctoral Fellow (2022-2023)

  • Sara Blomberg, Lund University
    Visiting Scientist (2019)

  • Andrew Bogdan
    Student Assistant (2020), UC Berkeley

  • Domas Buracas
    Student Researcher (2020), UC Berkeley

  • Jun Cai
    Visiting Student (2016-2018), ShanghaiTech University

  • Quinn Carvalho, Postdoctoral Researcher, National Renewable Energy Laboratory
    DOE SCGSR Doctoral Fellow (2021-2022)

  • Pengyuan Chen
    Student Assistant (2020), UC Berkeley

  • Shanshan Duan
    Visiting Student (2019-2021), China University of Geosciences

  • Ane Etxebarria, Postdoc, Fritz Haber Institute
    ALS Doctoral Fellow in Residence (2018-2019), CIC-energiGUNE

  • Marco Favaro, Staff Scientist, Helmholtz-Zentrum Berlin
    Postdoctoral Researcher (2015-2016)

  • Dana Goodacre
    ALS Doctoral Fellow in Residence (2018-2019), University of Auckland

  • Kenneth Goodman, Chemical Sciences Division, Berkeley Lab
    Postdoctoral Researcher (2020-2019)

  • Mario Gotters
    Visiting Student (2022-2023), University of Muenster, Germany

  • Alaina Hartnett, Graduate Student, Harvard University
    DOE SCGSR Doctoral Fellow (2023-2024)

  • Angelique Jarry, Senior Technology Manager, Moses Lake Industries
    Postdoctoral Researcher (2012-2015)

  • Beomgyun Jeong, Senior Researcher, Korea Basic Science Institute
    Postdoctoral Researcher (2014-2016)

  • Amal Kaduwela
    Student Assistant (2020-2021), UC San Diego

  • Heath Kersell, Research Associate, Oregon State University
    Postdoctoral Researcher (2016-2021)

  • Maxime Leclerc
    Visiting Student (2018-2019), University of Sherbrooke

  • Kyung-Jae Lee, Manager, Samsung SDI America Inc.
    Postdoctoral Researcher (2017-2020)

  • Bo-Hong Liu, Assistant Researcher, National Synchrotron Radiation Research Center
    Postdoctoral Researcher (2018-2020)

  • Mauricio Lopez Luna
    Postdoctoral Researcher (2023-2024), Chemical Sciences Division, Berkeley Lab

  • Qiang Lu
    Visiting Student (2015-2017), ShanghaiTech University

  • Qiyang Lu, Assistant Professor, Westlake University
    Postdoctoral Researcher (2019-2020)

  • Wenchao Lu, Environmental Chemist, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
    Postdoctoral Researcher (2018-2022)

  • Johannes Mahl, Computer Systems Engineer, ALS and Chemical Sciences Division, Berkeley Lab
    Postdoctoral Researcher (2022-2024)

  • Doran Martinez
    Student Assistant (2019), California State University

  • Rithvick Panchapakesan
    Student Researcher (2020-2022), UC Berkeley

  • Jin Qian, ALS and Chemical Sciences Division, Berkeley Lab
    Postdoctoral Researcher (2019-2021)

  • Hongyang Su
    Visiting Student (2017-2019), Hefei National Laboratory for Physical Sciences at the Microscale

  • Meiling Sun
    Postdoctoral Researcher (2018-2020), Wuhan University of Technology

  • Carlos Valero-Vidal
    Postdoctoral Researcher (2015-2019)

  • Lautaro Varas
    Visiting Scientist (2019-2021, 2023-2024), University of Costa Rica

  • Ye Wang
    Student Researcher (2020-2021), UC Berkeley

  • Hashini Weeraratna, Scientist, Thermo Fisher Scientific
    Postdoctoral Researcher (2020-2022)

  • Emmy Williams
    Student Assistant (2022-2023), UC Berkeley

  • Yifan Ye, Assistant Professor, University of Science and Technology of China
    Postdoctoral Researcher (2020-2021)

  • Yi Yu, Assistant Professor, ShanghaiTech University
    Visiting Postdoctoral Fellow (2016-2018)

  • Dong-Jin Yun, Samsung
    Visiting Scientist (2018-2019)

  • Isaac Zakaria
    ALS Doctoral Fellow in Residence (2022-2024), UC Berkeley

  • Meirong Zeng, Associate Professor, Shanghai Jiao Tong University
    Postdoctoral Researcher (2018-2021)

  • Xueqiang Zhang
    Postdoctoral Researcher (2019-2020), Chemical Sciences Division, Berkeley Lab