Open AccessObservation of interference effects in coherent diffraction of nanocrystals under X‐ray standing‐wave illumination
Author(s) -
Gryko Piotr,
Liang Meng,
Harder Ross,
Robinson Ian K.
Publication year - 2007
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049507040228
Subject(s) - diffraction , optics , standing wave , interference (communication) , coherent diffraction imaging , reflection (computer programming) , wavelength , materials science , nanocrystal , substrate (aquarium) , x ray crystallography , phase (matter) , phaser , physics , phase retrieval , nanotechnology , computer science , computer network , channel (broadcasting) , programming language , oceanography , fourier transform , quantum mechanics , geology
Coherent X‐ray diffraction is a useful technique for understanding the structure of compact objects including those which can be represented as phase objects. X‐rays are highly penetrating and have wavelengths very close to atomic spacing. In this work, gold nanocrystals (on a reflecting substrate) were imaged at the Advanced Photon Source and found to produce a novel double diffraction pattern. Simulations were carried out to explain the experimental diffraction pattern in terms of reflection of the incident beam from the substrate to produce a standing wave. The experimental data were then phased to produce a two‐dimensional real‐space image of the gold. It is expected that the standing‐wave illumination may be a useful tool to aid the convergence of the phasing algorithms for nanocrystals.