Modulation of the exfoliated graphene work function through cycloaddition of nitrile imines

Language
en
Document Type
Article
Issue Date
2018-01-17
Issue Year
2016
Authors
Barrejón, Myriam
Gómez-Escalonilla, María J.
Fierro, José Luis G.
Prieto, Pilar
Carrillo, José R.
Rodríguez, Antonio M.
Abellán, Gonzalo
López-Escalante, Ma Cruz
Gabás, Mercedes
López-Navarrete, Juan T.
Editor
Abstract

After the feasibility of the 1,3-dipolar cycloaddition reaction between nitrile imines and exfoliated graphene by density functional theory calculations was proved, very few-layer graphene was effectively functionalized using this procedure. Hydrazones with different electronic properties were used as precursors for the 1,3-dipoles, and microwave irradiation as an energy source enabled the reaction to be performed in a few minutes. The anchoring of organic addends on the graphene surface was confirmed by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis. Ultraviolet photoelectron spectroscopy (UPS) was used to measure the work function and band gap of these new hybrids. Our results demonstrate that it is possible to modulate these important electronic valence band parameters by tailoring the electron richness of the organic addends and/or the degree of functionalization.

Journal Title
Physical Chemistry Chemical Physics
Volume
18
Issue
42
Citation
Physical Chemistry Chemical Physics 18.42 (2016): S. 29582-29590. <http://pubs.rsc.org/en/content/articlelanding/2016/cp/c6cp05285a>
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