2 research outputs found
Brownian motion: a paradigm of soft matter and biological physics
This is a pedagogical introduction to Brownian motion on the occasion of the
100th anniversary of Einstein's 1905 paper on the subject. After briefly
reviewing Einstein's work in its contemporary context, we pursue some lines of
further developments and applications in soft condensed matter and biology.
Over the last century Brownian motion became promoted from an odd curiosity of
marginal scientific interest to a guiding theme pervading all of the modern
(live) sciences.Comment: 30 pages, revie
Development of EXELFS for Nanoscale Atomic Structure Determination
EXELFS spectroscopy contains the same local atomic structural information as XAFS; furthermore, it is readily
applied to low Z elements, has high spatial resolution, and the capacity of combining other local TEM measurements. Due
to hitherto relatively poor quality of the EELS data, the EXELFS technique has not been developed to its full advantage until
recently. We introduced various new methods to improve the data acquisition including real-time alignment and
accumulation of virtually unlimited number of spectra while monitoring sample drift, radiation damage, and changes in
energy resolution. We also developed a systematic data analysis procedure which corrects for the differences between
EXELFS and XAFS, and adopts the UWXAFS data analysis software package to perform EXELFS data analysis with the same
level of sophistication. The technique is demonstrated for SiC