Acoustic charge transport induced by the surface acoustic wave in chemical doped graphene

A graphene/LiNbO3 hybrid device is used to investigate the acoustic induced charge transport in chemical doped graphene. The chemical doping of graphene via its physisorption of gas molecules affects the surface acoustic wave (SAW) charge carrier transport in a manner different from electric field d...

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Bibliographic Details
Published in:Applied physics letters 2016-10, Vol.109 (18)
Main Authors: Zheng, Shijun, Zhang, Hao, Feng, Zhihong, Yu, Yuanyuan, Zhang, Rui, Sun, Chongling, Liu, Jing, Duan, Xuexin, Pang, Wei, Zhang, Daihua
Format: Article
Language:English
Subjects:
Applied physics
Carrier transport
Charge transport
Chemical detection
Current carriers
Doping
Graphene
Lithium niobates
Majority carriers
Nanomaterials
Organic chemistry
Surface acoustic waves
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Summary:A graphene/LiNbO3 hybrid device is used to investigate the acoustic induced charge transport in chemical doped graphene. The chemical doping of graphene via its physisorption of gas molecules affects the surface acoustic wave (SAW) charge carrier transport in a manner different from electric field drift. That transport induces doping dependent macroscopic acoustoelectric current. The chemical doping can manipulate majority carriers and induces unique acoustoelectric features. The observation is explained by a classical relaxation model. Eventually the device based on acoustoelectric current is proved to outperform the common chemiresistor for chemicals. Our finding provides insight into acoustic charge carrier transport during chemical doping. The doping affects interaction of carriers with SAW phonon and facilitates the understanding of nanoscale acoustoelectric effect. The exploration inspires potential acoustoelectric application for chemical detection involving emerging 2D nanomaterials.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4967192