期刊
COMPUTATIONAL MATERIALS SCIENCE
卷 51, 期 1, 页码 141-145出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.commatsci.2011.07.045
关键词
Nitrated tyrosine; Metal-doped graphene; Density functional theory; Biosensor
资金
- City University of Hong Kong [9667044]
- Centre for Applied Computing and Interactive Media at the City University of Hong Kong
- Natural Science Foundation of Shandong Province, China [ZR2009AQ011]
The adsorption of nitrated tyrosine on the intrinsic and metal-doped graphene was studied by density functional theory in order to explore the possibility of using graphene-based biosensor to detect the protein tyrosine nitration (PTN). The configurations of (a) phenolic ring coordination and (b) nitro group coordination on the graphene were compared. It was found that nitrated tyrosine was physisorbed on the intrinsic graphene and favored coordinating with the intrinsic graphene by phenolic ring, while chemisorption was observed on Au, Cr and Ni-doped graphene with high binding energy. In contrast, the nitrated tyrosine favored coordinating with the metal-doped graphene through metal-nitro group configuration. The electronic density of states analysis showed strong orbital hybridization between the nitro group and metal-doped graphene. The calculation indicated that the metal-doped graphene was sensitive to the tyrosine nitration, thus suggesting the potential application of metal-doped graphene for PIN detection. (C) 2011 Elsevier B.V. All rights reserved.
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