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Title: Tuning the electron affinity and secondary electron emission of diamond (100) surfaces by diels-alder reaction
Authors: Qi, D. 
Liu, L. 
Gao, X. 
Ouyang, T.
Chen, S. 
Loh, K.P. 
Wee, A.T.S. 
Issue Date: 11-Sep-2007
Source: Qi, D., Liu, L., Gao, X., Ouyang, T., Chen, S., Loh, K.P., Wee, A.T.S. (2007-09-11). Tuning the electron affinity and secondary electron emission of diamond (100) surfaces by diels-alder reaction. Langmuir 23 (19) : 9722-9727. ScholarBank@NUS Repository.
Abstract: The tuning of electron affinity and secondary electron emission on diamond (100) surfaces due to cycloaddition with 1,3-butadiene is investigated by photoemission experiments and density functional theory (DFT) calculations. A significant reduction in electron affinity up to 0.7 eV and enhancement of secondary electron emission were observed after 1,3-butadiene adsorption. The lowering of vacuum level via 1,3-butadiene adsorption is supported by DFT calculations. The C-H bonds in the covalently bonded organics on diamond contribute to the enhanced secondary electron emission and reduced electron affinity in a mechanism similar to that of C-H bonds on hydrogenated diamond surfaces. This combination of strong secondary emission and low electron affinity by the organic functionalization of diamond has potential applications in diamond-based molecular electronic devices. © 2007 American Chemical Society.
Source Title: Langmuir
ISSN: 07437463
DOI: 10.1021/la701285h
Appears in Collections:Staff Publications

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