Abstract
A discussion is given of a new class of methods to ascertain the configuration of adsorbates on surfaces. This class uses the extended x-ray-absorption fine-structure (EXAFS) effect, which can be simply related to the local environment about atoms of a particular element. Both ordered and disordered arrays of atoms can be studied and directions perpendicular and parallel to the surface can be distinguished. The results of an EXAFS study of Br//2 adsorbed on Grafoil are summarized, illustrating the detailed information obtainable by this technique. It is found that at 0. 2 monolayer coverage at room temperature Br//2 adsorbs as molecules. One atom of the molecule is fixed to the graphite substrate with the other atom free to flop around randomly. The location of the fixed Br atom is also determined.
| Original language | English |
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| Pages | 461-465 |
| Number of pages | 5 |
| State | Published - 1976 |
| Externally published | Yes |
| Event | Proc of Natl Symp of AVS, 23rd - Chicago, IL, USA Duration: 21 Sep 1976 → 24 Sep 1976 |
Conference
| Conference | Proc of Natl Symp of AVS, 23rd |
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| City | Chicago, IL, USA |
| Period | 21/09/76 → 24/09/76 |