Tag Archives: nanoparticles

Links for 02/20/2012

The response of colloidal polystyrene nanoparticles to shear flow in a rotating cell is measured using XPCS.  The ability to measure diffusion in a direction perpendicular to this flow is also shown: X-ray photon correlation spectroscopy during homogeneous shear flow … Continue reading

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Giant molecules or tiny crystals?

Nature Materials has a News and Views article by Ian Robinson titled “Coherent diffraction: Giant molecules or tiny crystals?”, which reviews recent coherent electron diffraction results by Huang et al. featured here earlier. One of the interesting points made in … 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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Xraying Nanoparticles in Ball-Lightning and Fuel Injection jets

Observations of ball-lightning – long-lived (2 to 50 seconds) bright fireballs size of baseball to beach ball – have been observed for centuries. Previous theoretical work ascribes the longevity of the ball lightnings to the slow oxidation process of silicon, … Continue reading

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Nanoparticle Self-assembly with DNA

Image on the left is the cover of Jan. 31 issue of Nature. Anyone who took high school chemistry has played with “sticks and balls” models of molecules or crystalline atoms. There are magnetic toy sets which allow kids to … Continue reading

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