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Enhancement of CO detection in Al doped graphene

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arxiv 0806.3172 v1 pith:EXZCDH26 submitted 2008-06-19 cond-mat.mtrl-sci cond-mat.other

Enhancement of CO detection in Al doped graphene

Z. M. Ao , J. Yang , S. Li , Q. Jiang This is my paper
classification cond-mat.mtrl-sci cond-mat.other
keywords graphenedopedenhancementadsorptionconductivitydevelopedelectricallarge
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A principle of enhancement CO adsorption was developed theoretically by using density functional theory through doping Al into graphene. The results show that the Al doped graphene has strong chemisorption of CO molecule by forming Al-CO bond, where CO onto intrinsic graphene remains weak physisorption. Furthermore, the enhancement of CO sensitivity in the Al doped graphene is determined by a large electrical conductivity change after adsorption, where CO absorption leads to increase of electrical conductivity upon via introducing large amount of shallow acceptor states. Therefore, this newly developed Al doped graphene would be an excellent candidate for sensing CO gas.

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