| A-Z-A型石墨烯场效应晶体管吸附 效应的第一性原理研究 |
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| 引用本文： | 秦军瑞,陈书明,张超,陈建军,梁斌,刘必慰.A-Z-A型石墨烯场效应晶体管吸附 效应的第一性原理研究[J].物理学报,2012,61(2):023102-200. |
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| 作者姓名： | 秦军瑞 陈书明 张超 陈建军 梁斌 刘必慰 |
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| 作者单位： | 国防科技大学计算机学院, 长沙 410073;国防科技大学计算机学院, 长沙 410073;国防科技大学计算机学院, 长沙 410073;国防科技大学计算机学院, 长沙 410073;国防科技大学计算机学院, 长沙 410073;国防科技大学计算机学院, 长沙 410073 |
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| 基金项目： | 国家自然科学基金重点项目(批准号: 60836004)和国家自然科学基金(批准号：61006070)资助的课题. |
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| 摘 要： | 利用第一性原理的计算方法, 研究了A-Z-A型GNR-FET的电子结构和输运性质及其分子吸附效应. 得到了以下结论: 纯净的A-Z-A型GNR-FET具有典型的双极型晶体管特性, 吸附分子的存在会使纳米带能隙变小. 对于吸附H, H2, H2O, N2, NO, NO2, O2, CO2和SO2分子的情况, A-Z-A型GNR-FET仍然保持着场效应晶体管的基本特征, 但吸附不同类型的分子会使GNR-FET的输运特性发生不同程度的改变; 对于吸附OH分子的情况, 输运特性发生了本质的改变, 完全不具有场效应晶体管的特性. 这些研究结果将有助于石墨烯气体探测器的工程实现, 并对应用于不同环境中GNR-FET的设计具有重要指导意义.
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| 关 键 词： | 石墨烯纳米带 石墨烯晶体管 分子吸附 电子结构 |
First-principles study of adsorption effect of A-Z-A graphene nanoribbons field effect transistor |
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| Qin Jun-Rui,Chen Shu-Ming,Zhang Chao,Chen Jian-Jun,Liang Bin and Liu Bi-Wei.First-principles study of adsorption effect of A-Z-A graphene nanoribbons field effect transistor[J].Acta Physica Sinica,2012,61(2):023102-200. |
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| Authors: | Qin Jun-Rui Chen Shu-Ming Zhang Chao Chen Jian-Jun Liang Bin and Liu Bi-Wei |
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| Institution: | College of Computer, National University of Defense Technology, Changsha 410073, China;College of Computer, National University of Defense Technology, Changsha 410073, China;College of Computer, National University of Defense Technology, Changsha 410073, China;College of Computer, National University of Defense Technology, Changsha 410073, China;College of Computer, National University of Defense Technology, Changsha 410073, China;College of Computer, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | By performing first-principles calculations, we demonstrate the electronic structure, the transport properties, and the adsorption effect of A-Z-A graphene nanoribons field effect transistor. It is concluded that the pure A-Z-A GNR-FET has typical bipolar characteristics, and energy gaps will become smaller due to the adsorbed molecule. For the adsorption of H, N2, NO2, H2O, SO2, O2 and NO, A-Z-A GNR-FET remains typical bipolar characteristic, but shows a little difference in transport property after it has adsorbed different types of molecles. For the adsorption of OH, transport property changes totally and does not have a bipolar characteristic any more. These results may contribute to the implementation of gas detector based on GNRs and the design of GNR-FET applied in complex environments. |
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| Keywords: | graphene nanoribbons graphene nanoribbons field effect transistor molecule adsorption electronic structure |
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