X-ray studies of nanoporous gold : powder diffraction by large crystals with small holes

Matthias Graf, Dinh Bao Nam Ngo, Jörg Weißmüller & Jürgen Markmann
X-ray diffraction studies of nanoporous gold face the poorly understood diffraction scenario where large coherent crystals are riddled with nanoscale holes. Theoretical considerations derived in this study show that the ligament size of the porous network influences the scattering despite being quasi single crystalline. Virtual diffraction of artificially generated samples confirms the results but also shows a loss of long-range coherency and the appearance of microstrain due to thermal relaxation. Subsequently, a large set of...
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