Open AccessHigh-resolution chemical imaging of gold nanoparticles using hard x-ray ptychography
Author(s) -
Robert Hoppe,
Juliane Reinhardt,
G. Hofmann,
Jens Patommel,
JanDierk Grunwaldt,
Christian Danvad Damsgaard,
Gerd Wellenreuther,
Gerald Falkenberg,
Christian G. Schroer
Publication year - 2013
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.4807020
Subject(s) - ptychography , colloidal gold , materials science , chemical imaging , microscopy , nanoparticle , optics , resolution (logic) , image resolution , scattering , xanes , diffraction , absorption (acoustics) , chemical state , analytical chemistry (journal) , nanometre , nanoscopic scale , spectroscopy , nanotechnology , chemistry , nuclear magnetic resonance , physics , hyperspectral imaging , x ray photoelectron spectroscopy , quantum mechanics , remote sensing , chromatography , artificial intelligence , geology , computer science
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 L3 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.
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