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- W2801681371 abstract "The Scanning Transmission X-ray Microscope (STXM) on the X1A undulator beamline, at the National Synchrotron Light Source, BNL, has been used for imaging various wet, unstained biological samples at 55 nm Rayleigh resolution. The microscope's Modulation Transfer Function was measured and agrees well with theoretical calculations, confirming the performance of the microscope as designed. The microscope is operated mainly in direct imaging mode where x-rays of fixed energy are diffractively focused to a microprobe and the sample is scanned in two dimensions. By varying the x-ray energy while keeping the beam focused to one spot on the sample enables us to get localized chemical composition of the sample from the absorption spectra in an area smaller than 0.2 by 0.2 micron at present. The spatial distribution of the chemical compositions can be obtained with a spacial resolution of 55 nm by imaging at absorption maxima of specific chemical bonds. The chemical sensitivity of the X-ray Absorption Near Edge Structure (XANES) provides a new contrast mechanism for organic system imaging." @default.
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- W2801681371 date "1993-08-01" @default.
- W2801681371 modified "2023-09-27" @default.
- W2801681371 title "Chemical contrast in scanning transmission x-ray microscope" @default.
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- W2801681371 doi "https://doi.org/10.1017/s0424820100149076" @default.
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