Time-resolved X-ray microscopy of nanoparticle aggregates under oscillatory shear

Details Time-resolved X-ray microscopy of nanoparticle aggregates under oscillatory shear Time-resolved X-ray microscopy of nanoparticle aggregates under oscillatory shear

2008-12-05

arxiv.org/abs/0812.1143v1

Physics

Condensed Matter

Soft Condensed Matter

submitted to J. Synchrot. Radiat

Scientific paper

Of all current detection techniques with nanometer resolution, only X-ray microscopy allows imaging nanoparticles in suspension. Can it also be used to investigate structural dynamics? When studying response to mechanical stimuli, the challenge lies in applying them with precision comparable to spatial resolution. In the first shear experiments performed in an X-ray microscope, we accomplished this by inserting a piezo actuator driven shear cell into the focal plane of a scanning transmission X-ray microscope (STXM). Thus shear-induced reorganization of magnetite nanoparticle aggregates could be demonstrated in suspension. As X-ray microscopy proves suitable for studying structural change, new prospects open up in physics at small length scales.

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