title: Tuning the electron affinity and secondary electron emission of diamond (100) surfaces by Diels-Alder reaction.
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.
authors: Department of Physics, National University of Singapore, 2 Science Drive 3 Singapore 117542.
authors: Dongchen
authors: D
authors: Qi
authors: Lei
authors: L
authors: Liu
authors: Xingyu
authors: X
authors: Gao
authors: Ti
authors: T
authors: Ouyang
authors: Shi
authors: S
authors: Chen
authors: Kian Ping
authors: KP
authors: Loh
authors: Andrew T S
authors: AT
authors: Wee