Detection of DNA Bases Using Fe Atoms and Graphene

The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using first- principles calculations. The stability of geometry, the electronic structure and magnetic property are investigated. The results indicate that four DNA bases, i.e., adenine, thymine, cytosine...

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Published inChinese physics letters Vol. 33; no. 1; pp. 123 - 126
Main Author 胡建芬 冯琳 张文星 李勇 卢亚鑫
Format Journal Article
LanguageEnglish
Published 2016
Subjects
Adenines
Adsorption
Composite structures
Deoxyribonucleic acid
Graphene
Guanines
Magnetic moment
Thymine
吸附作用
复合结构
核酸碱基
检测
石墨
第一性原理计算
胸腺嘧啶
铁原子
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Summary:The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using first- principles calculations. The stability of geometry, the electronic structure and magnetic property are investigated. The results indicate that four DNA bases, i.e., adenine, thymine, cytosine and guanine, can all be adsorbed on the probe solidly. However, the magnetic moments of the composite structure can be observed only when adenine adsorbs on the probe. In the cases of the adsorption of the other three bases, the magnetic moments of the composite structure are zero. Based on the significant change of magnetic moment of the composite structure, adenine can be distinguished conveniently from thymine, cytosine and guanine. This work may provide a new way to detect DNA bases.
Bibliography:11-1959/O4
The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using first- principles calculations. The stability of geometry, the electronic structure and magnetic property are investigated. The results indicate that four DNA bases, i.e., adenine, thymine, cytosine and guanine, can all be adsorbed on the probe solidly. However, the magnetic moments of the composite structure can be observed only when adenine adsorbs on the probe. In the cases of the adsorption of the other three bases, the magnetic moments of the composite structure are zero. Based on the significant change of magnetic moment of the composite structure, adenine can be distinguished conveniently from thymine, cytosine and guanine. This work may provide a new way to detect DNA bases.
Jian-Fen Hu, Lin Feng, Wen-Xing Zhang, Yong Li, Ya-Xin Lu（ Key Laboratory of Advanced Transducers and Intelligent Control System （Ministry of Education）, Department of Physics, Taiyuan University of Technology, Shanxi 030024）
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/1/017901