By M. Enachescu, M. Salmeron (auth.), A. P. Bonzel (eds.)
Surface technological know-how is known as a comparatively younger clinical self-discipline, excited by the actual and chemical houses of a phenomena on fresh and lined strong surfaces, studied less than numerous stipulations. The adsorption of atoms and molecules on strong surfaces is, for instance, the sort of situation, attached with roughly drastic adjustments of all floor houses. An adsorption occasion is usually saw in nature and located to be of technical significance in lots of business procedures. hence, floor technological know-how is interdisciplinary via its very nature, and as such an immense middleman among basic and utilized research.
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Extra resources for Adsorbed Layers on Surfaces
The pressure vs. temperature phase diagram has seven different P–Si phases. 33 P/Si atom ratio [73Van]. 4 Adsorption of S, P, As, Se, and Sb [Ref. p. 50 postulated, leading to a surface coverage of 1 P/Si atom ratio [73Van]. 33×10-7 mbar) at temperatures between 800 K and 900 K leads to a (6√3×6√3) phase with a 3 P/Si atom ratio [73Van]. At temperatures above 955 K, the (1×1) phase returns, followed by a (2√3×√3) phase with island formation (970 K -1020 K). The structure returns to the clean Si(111)-(7×7) at temperatures above 1070 K.
The desorption of hydrogen frees silicon sites where further phosphine adsorption may take place. At temperatures above 875 K, phosphorus was depleted from the surface, as measured by AES [84Yu], leaving a clean surface. Desorption of P2 was reported [86Yu] in thermal desorption studies with an onset temperature of ~875 K and a peak maximum at ~975 K. Van Bommel and Meyer [67Van] have reported a LEED study of phosphine adsorption on Si(111) as a function of both surface temperature and phosphine pressure.
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