Monthly Archives: March 2008

Dynamical phase transition in periodically sheared colloids

This weeks item is Nature Physics paper Random organization in periodically driven systems by Corte, Golub, Chaikin and Pine. When you consider a dilute suspension of colloidal particles undergoing a periodic driving force – such as shear, at low density … Continue reading

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Droplet Coalescence

Two recent PRLs are addressing the issue of how two droplets merge into one. Kamel Fezzaa and Yujie Wang from Argonne use ultrafast x-ray phase-contrast imaging to take sub-microsecond exposures of droplet coalescence, which is complete in just under a … Continue reading

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Keyhole Imaging, Relaxation in Nanoparticles, CDW correlations

In advanced publication of Nature Physics, Brian Abbey and colleagues present a new technique, called “Keyhole Coherent Diffractive Imaging”, which enables them to study extended objects (in similar fashion as ptychography, but based on a somewhat different geometry). The basic … Continue reading

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X-ray lens-less imaging of buried nanostructures

Coherent X-ray Diffraction allows reconstruction of small particles with ~15 nanometer resolution. However, High Resolution Transmission Electron Microscopy (see current issue of MRS Bulletin for review) can achieve an atomic-scale resolution for crystalline nanoscale objects. But since electrons interact very … Continue reading

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Dark-field X-ray Phase Contrast Imaging

This week’s featured paper is the paper by Franz Pfeiffer and colleagues at Paul Scherrer Institute in Switzerland: Hard-X-ray dark-field imaging using a grating interferometer, Nature Materials 7, 134 – 137 (2008) . This Nature Materials paper is related to … Continue reading

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