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Coherent x-ray diffraction imaging of ZnO nanostructures under confined illumination

DOI: 10.1088/1367-2630/13/3/033006 DOI Help

Authors: Gang Xiong (London Centre for Nanotechnology) , Xiaojing Huang (London Centre for Nanotechnology, University College London) , Stephen Leake (London Centre for Nanotechnology, University College London) , Marcus Newton (London Centre for Nanotechnology, University College London) , Ross Harder (Argonne National Laboratory) , Ian Robinson (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: New Journal Of Physics , VOL 13

State: Published (Approved)
Published: March 2011

Abstract: Coherent x-ray diffraction imaging has been used to study a single ZnO nanorod in a confined illuminating condition. The focused beam size is smaller than the length of the nanorod, and the diffraction intensity is strongly dependent on the illumination position. The density maps show that the nanorod width in the radial direction is around 210 nm and has a length of 1.5 mu m, in agreement with the scanning electron microscope measurement. Reconstructed phase maps show a maximum phase change of 0.8 radians. The reconstructed direct space structures reveal the exit wavefront profile, which includes that of the focused x-ray beam. The beam profile presents in reconstructions some 'hill and valley' surface features with a typical size of a few tens of nanometres and are attributed to the noise due to the slow variation of the focused beam intensity along the boundary. A single ZnO tetrapod has been investigated with the same method to recover the beam profile in the horizontal direction.

Subject Areas: Physics

Facility: APS

Added On: 18/04/2011 08:30

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