Articles by Naylyn Gaffney in JoVE
Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene Rebecca A. Ryan1, Sophie Williams1, Andrew V. Martin1, Ruben A. Dilanian1, Connie Darmanin2, Corey T. Putkunz1, David Wood3, Victor A. Streltsov4, Michael W.M. Jones5, Naylyn Gaffney6, Felix Hofmann7, Garth J. Williams8, Sebastien Boutet9, Marc Messerschmidt10, M. Marvin Seibert11, Evan K. Curwood11, Eugeniu Balaur2, Andrew G. Peele5, Keith A. Nugent2, Harry M. Quiney1, Brian Abbey2 1ARC Centre of Excellence in Advanced Molecular Imaging, School of Physics, University of Melbourne, 2Australian Research Council (ARC) Centre of Excellence in Advanced Molecular Imaging, Department of Chemistry and Physics, La Trobe Institute for Molecular Sciences, La Trobe University, 3Department of Physics, Imperial College London, 4Florey Institute of Neuroscience and Mental Health, 5Science and Engineering Faculty, Queensland University of Technology, 6Swinburne University of Technology, 7Department of Engineering Science, University of Oxford, 8Brookhaven National Laboratory, 9Linac Coherent Light Source, SLAC National Accelerator Laboratory, 10BioXFEL Science and Technology Center, 11Laboratory of Molecular Biophysics, Department of Cell and Molecular Biology, Uppsala University, 12Australian Synchrotron We describe an experiment designed to probe the electronic damage induced in nanocrystals of Buckminsterfullerene (C60) by intense, femtosecond pulses of X-rays. The experiment found that, surprisingly, rather than being stochastic, the X-ray induced electron dynamics in C60 are highly correlated, extending over hundreds of unit cells within the crystals1.
Other articles by Naylyn Gaffney on PubMed
X-ray Laser-induced Electron Dynamics Observed by Femtosecond Diffraction from Nanocrystals of Buckminsterfullerene Science Advances. Sep, 2016 | Pubmed ID: 27626076 X-ray free-electron lasers (XFELs) deliver x-ray pulses with a coherent flux that is approximately eight orders of magnitude greater than that available from a modern third-generation synchrotron source. The power density of an XFEL pulse may be so high that it can modify the electronic properties of a sample on a femtosecond time scale. Exploration of the interaction of intense coherent x-ray pulses and matter is both of intrinsic scientific interest and of critical importance to the interpretation of experiments that probe the structures of materials using high-brightness femtosecond XFEL pulses. We report observations of the diffraction of extremely intense 32-fs nanofocused x-ray pulses by a powder sample of crystalline C60. We find that the diffraction pattern at the highest available incident power significantly differs from the one obtained using either third-generation synchrotron sources or XFEL sources operating at low output power and does not correspond to the diffraction pattern expected from any known phase of crystalline C60. We interpret these data as evidence of a long-range, coherent dynamic electronic distortion that is driven by the interaction of the periodic array of C60 molecular targets with intense x-ray pulses of femtosecond duration.