High-resolution chemical imaging of gold nanoparticles using hard x-ray ptychography

Journal Article · Mon May 20 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4807020· OSTI ID:22162948

Hoppe, R.; Patommel, J.; Schroer, C. G. ^[1]; Reinhardt, J. ^[1]; Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg ^[2]; Hofmann, G.; Grunwaldt, J. -D. ^[3]; Damsgaard, C. D. ^[4]; Wellenreuther, G.; Falkenberg, G. ^[5]

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1. Institute of Structural Physics, Technische Universitaet Dresden, D-01062 Dresden (Germany)
2. Germany
3. Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, D-76131 Karlsruhe (Germany)
4. Center for Electron Nanoscopy and Department of Physics, Technical University of Denmark, DK-2800 Lyngby (Denmark)
5. Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg (Germany)

We combine resonant scattering with (ptychographic) scanning coherent diffraction microscopy to determine the chemical state of gold nanoparticles with high spatial resolution. Ptychographic images of the sample are recorded for a series of energies around the gold L{sub 3} absorption edge. From these data, chemical information in the form of absorption and resonant scattering spectra is reconstructed at each location in the sample. For gold nanoparticles of about 100 nm diameter, a spatial resolution of about 20-30 nm is obtained. In the future, this microscopy approach will open the way to operando studies of heterogeneous catalysts on the nanometer scale.

• OSTI ID: 22162948
• Journal Information: Applied Physics Letters, Vol. 102, Issue 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
CATALYSTS
CHEMICAL STATE
COHERENT RADIATION
DIFFRACTION
GOLD
HARD X RADIATION
IMAGES
MICROSCOPY
NANOSTRUCTURES
RESONANCE SCATTERING
SPATIAL RESOLUTION
SPECTRA