Detection of DNA Bases Using Fe Atoms and Graphene
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摘要
The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using firstprinciples 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.
The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using firstprinciples 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.
The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using firstprinciples 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.
引文
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[7]Storm A J,Chen J H,Ling X S,Zandbergen W and Dekkerl C 2003 Nat.Mater.2 537
[8]Li J L,Stein D,McMuIlan C,Branton D,Aziz M J and Golovchenko J A 2001 Nature 412 166
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[13]Prasongkit J,Grigoriev A,Pathak B,Ahuja R and Scheicher R H 2011 Nano Lett.11 1941
[14]Isaeva O G,Katkov V L and Osipov V A 2014 Eur.Phys.J.B 87 1
[15]Chan K T,Neaton J B and Cohen M L 2008 Phys.Rev.B77 235430
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[17]Hu L B,Hu X R,Wu X B,Du C L,Dai Y C and Deng J B 2010 Phys.B:Condens.Matter 405 3337
[18]Cao C,Wu M,Jiang J Z and Cheng H P 2010 Phys.Rev.B 81 205424
[19]Mao Y,Yuan J and Zhong J 2008 J.Phys:Condens.Matter20 115209
[20]Segall M D,Lindan P J D,Probert M J Pickard C J,Hasnip P J,Clark S J and Payne M C 2002 J.Phys:Condens.Matter 14 2717
[21]Payne M C,Teter M P,Allan D C Arias T A and Joannopoulos J D 1992 Rev.Mod.Phys.64 1045
[22]Vanderbilt D 1990 Phys.Rev.B 41 7892
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