Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/15075
Title: Experimental and theoretical studies on organic attachment to the silicon surfaces
Authors: WANG ZHONGHAI
Keywords: silicon, surface, organic, adsorption, experimental, theoretical
Issue Date: 14-Dec-2005
Source: WANG ZHONGHAI (2005-12-14). Experimental and theoretical studies on organic attachment to the silicon surfaces. ScholarBank@NUS Repository.
Abstract: AbstractBenzene, thiophene, furan, pyrrole, benzonitrile and acrylonitrile adsorption on the Si(111)-(7??7) surface and acetonitrile on Si(100) have been investigated. Combined experimental and theoretical studies have been carried out. Studies of benzene adsorption on Si(111)-(7??7) unveil a 1,4-cyclohexadiene-like chemisorption state di-I? bonded onto a pair of neighboring adatom and rest atom. Thiophene attaches on Si(111)-(7??7) similarly at a di-radical binding site in a 2,5-dihydrothiophene-like structure. Furan adsorbs on Si(111)-(7??7) not only in a 2,5-dihydrofuran-like binding state, but also in an interesting dimer state. Pyrrole adsorbs on Si(111)-(7??7) dissociatively via cleavage of the N-H bond. The cyano group in benzonitrile is the only group involved in surface attachment via a [2+2]-like pathway. But acrylonitrile uses collaboratively its alkene and cyano functional groups. For acetonitrile adsorption on Si(100), the two different chemisorption states resolved in TDS studies correspond to a??side-ona?? bonded acetonitrile at different surface sites.
URI: http://scholarbank.nus.edu.sg/handle/10635/15075
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