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|Title:||Architecturing covalently bonded organic bilayers on the Si(111)-(7 × 7) surface via in situ photoinduced reaction||Authors:||Zhang, Y.P.
|Issue Date:||26-Apr-2012||Citation:||Zhang, Y.P., He, J.H., Xu, G.Q., Tok, E.S. (2012-04-26). Architecturing covalently bonded organic bilayers on the Si(111)-(7 × 7) surface via in situ photoinduced reaction. Journal of Physical Chemistry C 116 (16) : 8943-8949. ScholarBank@NUS Repository. https://doi.org/10.1021/jp300173d||Abstract:||Controlled formation of covalently bonded N-benzylideneaniline-like molecular layers has been achieved by photoinduced reaction of benzonitrile molecules physisorbed on the 4-bromostyrene modified Si(111)-(7 × 7) surface. The photoinduced reaction results in the C-Br bond cleavage and produces a radical site which concurrently reacts with the C - N cyano group of the physisorbed benzonitrile molecule above to form the -C-N=C- covalent linkage. X-ray photoelectron spectroscopy (XPS) and high-resolution electron energy loss spctroscopy (HREELS) experiments together with density functional theory (DFT) calculations confirm the formation of covalently bonded N-benzylideneaniline-like molecular layers on the silicon surface. The formation of this secondary molecular layer by photoinduced reaction may provide a direct pathway for further organic synthesis and fabrication of organic multilayers on semiconductor surfaces in a well-controlled enviornment. © 2012 American Chemical Society.||Source Title:||Journal of Physical Chemistry C||URI:||http://scholarbank.nus.edu.sg/handle/10635/52797||ISSN:||19327447||DOI:||10.1021/jp300173d|
|Appears in Collections:||Staff Publications|
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