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Volumn 22, Issue 24, 2010, Pages 2632-2636

Photocatalytic cleavage of self-Assembled organic monolayers by UV-lnduced charge transfer from CaN Substrates

Author keywords

[No Author keywords available]

Indexed keywords

ALIPHATIC CHAINS; MOLECULAR MONOLAYER; PHOTO-CATALYTIC; SELF-ASSEMBLED ORGANIC MONOLAYERS; SEMI-CONDUCTOR SURFACES;

EID: 77954843479     PISSN: 09359648     EISSN: 15214095     Source Type: Journal    
DOI: 10.1002/adma.200903756     Document Type: Article
Times cited : (29)

References (30)
  • 23
    • 77954840747 scopus 로고    scopus 로고
    • The typical method for determination of the HOMO level, ultraviolet photoelectron spectroscopy, was not used in the present work since rapid UV-induced degradation would yield spurious results [17]. The value was therefore obtained from Ref. [24].
    • The typical method for determination of the HOMO level, ultraviolet photoelectron spectroscopy, was not used in the present work since rapid UV-induced degradation would yield spurious results [17]. The value was therefore obtained from Ref. [24].
  • 25
    • 77954851173 scopus 로고    scopus 로고
    • In contrast, due to the downward band bending in p-type GaN and SiC, UV illumination results in surface accumulation of electrons instead of holes, independent of energetic alignment. In the absence of recombination sites, the molecular monolayers are stable under UV illumination.
    • In contrast, due to the downward band bending in p-type GaN and SiC, UV illumination results in surface accumulation of electrons instead of holes, independent of energetic alignment. In the absence of recombination sites, the molecular monolayers are stable under UV illumination.
  • 27
    • 77954835871 scopus 로고    scopus 로고
    • For example, the charge transfer dipole would be significantly reduced due to enhanced screening in the presence of water. Referring to the water splitting mechanism suggested in Ref. [26], electron transfer to the oxygen redox level of the adsorbed water film could enhance electronic transitions from shallow donor states to unoccupied defect states and therefore also the flux of holes drifting to the surface. Direct chemical reactions of hydrogen peroxide or non-radical hydroxide, being two of the possible products of water splitting, appears unlikely as these species are not reactive enough to cause chemical cracking of the alkyl chain.
    • For example, the charge transfer dipole would be significantly reduced due to enhanced screening in the presence of water. Referring to the water splitting mechanism suggested in Ref. [26], electron transfer to the oxygen redox level of the adsorbed water film could enhance electronic transitions from shallow donor states to unoccupied defect states and therefore also the flux of holes drifting to the surface. Direct chemical reactions of hydrogen peroxide or non-radical hydroxide, being two of the possible products of water splitting, appears unlikely as these species are not reactive enough to cause chemical cracking of the alkyl chain.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.