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Acta Phys. -Chim. Sin.  2013, Vol. 29 Issue (02): 250-254    DOI: 10.3866/PKU.WHXB201211141
THEORETICAL AND COMPUTATIONAL CHEMISTRY     
First-Principles Study of Graphene-Based Biomolecular Sensor
ZOU Hui1, NI Xiang1, PENG Sheng-Lin1, OUYANG Jun1, CHEN Yu1, OUYANG Fang-Ping1,2
1 School of Physics and Electronics, Central South University, Changsha 410083, P. R. China;
2 Powder Metallurgy Research Institute, and State Key Laboratory of Powder Metallurgy, Changsha 410083, P. R. China
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Abstract  

First-principles calculations were applied to design and study the electron transport behavior of a biomolecular sensor with graphene-based electrodes. It is shown that the designed biosensor is capable of distinguishing different nucleotide molecules such as cytosine, methylcytosine, and hydroxymethylcytosine. The current was seen to change by nearly one order of magnitude, while molecules passed through the device individually. The resolution capacity of the present device was primarily determined by the interactions and specific configurations of two adjacent single-stranded desoxyribonucleic acid (DNA) molecules and their specific configurations. This graphene-based biosensor was proved to be effective and efficient in detecting and distinguishing different DNA molecules, which provides a new potential method to pinpoint exactly varietal base molecules in DNAchains for the genetic information.



Key wordsFirst-principles      Graphene      Methylcytosine      Hydroxymethylcytosine      Transverse conductance     
Received: 08 September 2012      Published: 14 November 2012
MSC2000:  O641  
Fund:  

The project was supported by the National Natural Science Foundation of China (51272291, 21103232, 11104356), Natural Science Foundation of Hunan Province, China, (11JJ4001), China Postdoctoral Science Foundation (2012M511399), Science and Technology Program of Hunan Province, China (2012RSJ4009), and Postdoctoral Seience Foundation of Central South University, China (201202025).

Cite this article:

ZOU Hui, NI Xiang, PENG Sheng-Lin, OUYANG Jun, CHEN Yu, OUYANG Fang-Ping. First-Principles Study of Graphene-Based Biomolecular Sensor. Acta Phys. -Chim. Sin., 2013, 29(02): 250-254.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB201211141     OR     http://www.whxb.pku.edu.cn/Y2013/V29/I02/250

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