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1.
Phys Rev Lett ; 85(5): 1040-3, 2000 Jul 31.
Article in English | MEDLINE | ID: mdl-10991469

ABSTRACT

Fullerene molecules absorbed on the highly anisotropic Au(110)-p(1x2) surface induce an ordered p(6x5) superstructure that has been solved by applying the 2D "direct methods" difference sum function to the surface x-ray diffraction data set. We found that the C (60)-gold interface is structurally much more complex than the one previously suggested by scanning tunneling microscopy data [J. K. Gimzewski, S. Modesti, and R. R. Schlittler, Phys. Rev. Lett. 72, 1036 (1994)]. Indeed a large fraction of Au surface atoms are displaced from their original positions producing microscopic pits that may accommodate the fullerene molecules.

2.
Anal Biochem ; 252(1): 106-9, 1997 Oct 01.
Article in English | MEDLINE | ID: mdl-9324947

ABSTRACT

We analyzed the effects of cold oxygen plasma ashing of neurobiological specimens on different elements with synchrotron spectromicroscopy. Our results demonstrate that while carbon is almost completely removed, phosphorus, calcium, potassium, sulfur, and, to some extent, nitrogen are retained and their relative concentration is enhanced.


Subject(s)
Microscopy, Electron/methods , Tissue Fixation/methods , Animals , Calcium/chemistry , Carbon/chemistry , Cerebellum/ultrastructure , Nitrogen/chemistry , Oxygen/chemistry , Phosphorus/chemistry , Potassium/chemistry , Rats , Spectrometry, X-Ray Emission/methods , Sulfur/chemistry
5.
Phys Rev B Condens Matter ; 43(11): 9070-9075, 1991 Apr 15.
Article in English | MEDLINE | ID: mdl-9996575
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