Sealed cell for in-water measurements

Kaznacheyev, K.; Osanna, A.; Winn, B.
May 2000
AIP Conference Proceedings;2000, Vol. 507 Issue 1, p395
Academic Journal
We describe here the use of a very simple sealed cell to carry out absorption spectroscopy measurements on hydrated thin films, particular for oxygen K edge studies, where the sample thickness is limited by about 0.5 microns due to the strong water absorption. The cell is small enough to be mounted on a standard TEM holder, and has been used in the vacuum chamber of the Stony Brook cryo STXM. An application includes the measurement of the Si[sub 3]N[sub 4] wetting properties and spectroscopy of amino acid solutions. Comparison with frozen hydrated glycine shows that special care must taken to avoid the drying of submicron water layer during sample preparation, since precipitation may take place and influence XANES spectra.


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