Dr. Camila Bacellar Cases da Silveira


Beamline Scientist at Alvra 

Paul Scherrer Institute
Forschungsstrasse 111
5232 Villigen PSI

Camila received her Ph.D. in Physical Chemistry from the University of California - Berkeley, in 2017, working in the groups of Prof. D. Neumark and Dr. O. Gessner. Her Ph.D. work focused on the ultrafast dynamics of highly excited Helium nanodroplets, investigated via time-resolved photoelectron spectroscopy, using a high-harmonic generation source, as well as probed by single-particle coherent diffractive imaging, at the LCLS, in Stanford. She moved to Switzerland for a post-doctoral position at the Laboratory of Ultrafast Spectroscopy at EPFL, where she utilized ultrafast x-rays techniques (XAS and XES) to investigate the structural and electronic dynamics of heme proteins in physiological media, at X-ray FEL facilities around the world. Since 2020, she is an Instrument Scientist at the Alvra endstation at SwissFEL, continuing her research on photoinduced ultrafast dynamics of chemical and biological systems, and collaborating with external users of the Alvra endstation. 

Camila is currently a beamline scientist and the group leader of the Alvra endstation at SwissFEL. Her role, together with the Alvra group, is to operate the Alvra Prime and Flex instruments of the endstation and provide user support for external groups to perform experiments.

  • Ultrafast excited state dynamics in chemical and biological systems
  • X-ray absorption (XAS) and X-ray emission  (XES) Spectroscopy
  • X-ray imaging techniques (liquid scattering, single-shot coherent diffractive imaging)
  • Bacellar C, Chergui M
    Ultrafast X-ray spectroscopy of haem proteins
    Chimia. 2022; 76(6): 538-545. https://doi.org/10.2533/chimia.2022.538
  • Cannelli O, Wiktor J, Colonna N, Leroy L, Puppin M, Bacellar C, et al.
    Atomic-level description of thermal fluctuations in inorganic lead halide perovskites
    Journal of Physical Chemistry Letters. 2022; 13(15): 3382-3391. https://doi.org/10.1021/acs.jpclett.2c00281
  • Rouxel JR, Rösner B, Karpov D, Bacellar C, Mancini GF, Zinna F, et al.
    Hard X-ray helical dichroism of disordered molecular media
    Nature Photonics. 2022; 16(8): 570-574. https://doi.org/10.1038/s41566-022-01022-x
  • Tanyag RMP, Bacellar C, Pang W, Bernando C, Gomez LF, Jones CF, et al.
    Sizes of pure and doped helium droplets from single shot x-ray imaging
    Journal of Chemical Physics. 2022; 156(4): 041102 (8 pp.). https://doi.org/10.1063/5.0080342
  • Bacellar C, Kinschel D, Cannelli O, Sorokin B, Katayama T, Mancini GF, et al.
    Femtosecond X-ray spectroscopy of haem proteins
    Faraday Discussions. 2021; 228: 312-328. https://doi.org/10.1039/d0fd00131g
  • Nass K, Bacellar C, Cirelli C, Dworkowski F, Gevorkov Y, James D, et al.
    Pink-beam serial femtosecond crystallography for accurate structure-factor determination at an X-ray free-electron laser
    IUCrJ. 2021; 8: 905-920. https://doi.org/10.1107/S2052252521008046
  • Saladrigas CA, Feinberg AJ, Ziemkiewicz MP, Bacellar C, Bucher M, Bernando C, et al.
    Charging and ion ejection dynamics of large helium nanodroplets exposed to intense femtosecond soft X-ray pulses
    European Physical Journal Special Topics. 2021; 230: 4011-4023. https://doi.org/10.1140/epjs/s11734-021-00280-0
  • Bacellar C, Kinschel D, Mancini GF, Ingle RA, Rouxel J, Cannelli O, et al.
    Heme doming in ferric Cytochrome c: femtosecond X-ray absorption and X-ray emission studies
    In: The 22nd international conference on ultrafast phenomena 2020. International conference on ultrafast phenomena. Conference proceedings 2000-2020. Washington, D.C.: The Optical Society; 2020:Th1A.2 (3 pp.). https://doi.org/10.1364/UP.2020.Th1A.2
  • Bacellar C, Kinschel D, Mancini GF, Ingle RA, Rouxel J, Cannelli O, et al.
    Spin cascade and doming in ferric hemes: femtosecond X-ray absorption and X-ray emission studies
    Proceedings of the National Academy of Sciences of the United States of America PNAS. 2020; 117(36): 21914-21920. https://doi.org/10.1073/pnas.2009490117
  • Kinschel D, Bacellar C, Cannelli O, Sorokin B, Katayama T, Mancini GF, et al.
    Femtosecond X-ray emission study of the spin cross-over dynamics in haem proteins
    Nature Communications. 2020; 11(1): 4145 (8 pp.). https://doi.org/10.1038/s41467-020-17923-w
  • Nass K, Cheng R, Vera L, Mozzanica A, Redford S, Ozerov D, et al.
    Advances in long-wavelength native phasing at X-ray free-electron lasers
    IUCrJ. 2020; 7: 965-975. https://doi.org/10.1107/S2052252520011379
  • O'Connell SMO, Tanyag RMP, Verma D, Bernando C, Pang W, Bacellar C, et al.
    Angular momentum in rotating superfluid droplets
    Physical Review Letters. 2020; 124(21): 215301 (7 pp.). https://doi.org/10.1103/PhysRevLett.124.215301
  • Prat E, Abela R, Aiba M, Alarcon A, Alex J, Arbelo Y, et al.
    A compact and cost-effective hard X-ray free-electron laser driven by a high-brightness and low-energy electron beam
    Nature Photonics. 2020; 14: 748-754. https://doi.org/10.1038/s41566-020-00712-8
  • Rossi TC, Grolimund D, Cannelli O, Mancini GF, Bacellar C, Kinschel D, et al.
    X-ray absorption linear dichroism at the Ti K-edge of rutile (001) TiO2 single crystal
    Journal of Synchrotron Radiation. 2020; 27: 425-435. https://doi.org/10.1107/S160057752000051X
  • Smolentsev G, Milne CJ, Guda A, Haldrup K, Szlachetko J, Azzaroli N, et al.
    Taking a snapshot of the triplet excited state of an OLED organometallic luminophore using X-rays
    Nature Communications. 2020; 11: 2131 (9 pp.). https://doi.org/10.1038/s41467-020-15998-z
  • Cannelli O, Bacellar C, Ingle RA, Bohinc R, Kinschel D, Bauer B, et al.
    Toward time-resolved laser T-jump/X-ray probe spectroscopy in aqueous solutions
    Structural Dynamics. 2019; 6(6): 064303 (8 pp.). https://doi.org/10.1063/1.5129626
  • Rossi TC, Grolimund D, Nachtegaal M, Cannelli O, Mancini GF, Bacellar C, et al.
    X-ray absorption linear dichroism at the Ti K edge of anatase TiO2 single crystals
    Physical Review B. 2019; 100(24): 245207 (11 pp.). https://doi.org/10.1103/PhysRevB.100.245207