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Coherent diffraction imaging of nanoscale strain evolution in a single crystal under high pressure.


ABSTRACT: The evolution of morphology and internal strain under high pressure fundamentally alters the physical property, structural stability, phase transition and deformation mechanism of materials. Until now, only averaged strain distributions have been studied. Bragg coherent X-ray diffraction imaging is highly sensitive to the internal strain distribution of individual crystals but requires coherent illumination, which can be compromised by the complex high-pressure sample environment. Here we report the successful de-convolution of these effects with the recently developed mutual coherent function method to reveal the three-dimensional strain distribution inside a 400?nm gold single crystal during compression within a diamond-anvil cell. The three-dimensional morphology and evolution of the strain under pressures up to 6.4?GPa were obtained with better than 30?nm spatial resolution. In addition to providing a new approach for high-pressure nanotechnology and rheology studies, we draw fundamental conclusions about the origin of the anomalous compressibility of nanocrystals.

SUBMITTER: Yang W 

PROVIDER: S-EPMC3644065 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Coherent diffraction imaging of nanoscale strain evolution in a single crystal under high pressure.

Yang Wenge W   Huang Xiaojing X   Harder Ross R   Clark Jesse N JN   Robinson Ian K IK   Mao Ho-kwang HK  

Nature communications 20130101


The evolution of morphology and internal strain under high pressure fundamentally alters the physical property, structural stability, phase transition and deformation mechanism of materials. Until now, only averaged strain distributions have been studied. Bragg coherent X-ray diffraction imaging is highly sensitive to the internal strain distribution of individual crystals but requires coherent illumination, which can be compromised by the complex high-pressure sample environment. Here we report  ...[more]

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