Chemical gating of In2O3 nanowires by organic and biomolecules
Chemical gating of In2O3 nanowires by organic and biomolecules
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DOI：
10.1063/1.1625421
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发表时间：
2003-11-10
影响因子：
4
通讯作者：
Zhou, CW
中科院分区：
文献类型：
--
作者：
Li, C;Lei, B;Zhou, CW
利用In_2O_3纳米线晶体管研究了含氨基和硝基的有机分子和生物分子的化学门控效应。吸附这些分子后，纳米线的电导发生了显著的变化。具体地说，丁胺等有机分子中的氨基给In_2O_3纳米线提供电子，从而导致载流子浓度和电导增加，而含有硝基的分子(如亚硝酸丁酯)通过抽出电子使In_2O_3纳米线的导电性降低。此外，还研究了纳米线器件部分暴露于亚硝酸丁酯所产生的管内结，并获得了显著的整流电流-电压特性。此外，还观察到了低密度脂蛋白胆固醇的化学门控作用，并将其归因于生物物种携带的氨基。低密度脂蛋白胆固醇是冠心病的致病因素。(C)2003年美国物理研究所。
In2O3 nanowire transistors were used to investigate the chemical gating effect of organic molecules and biomolecules with amino or nitro groups. The nanowire conductance changed dramatically after adsorption of these molecules. Specifically, amino groups in organic molecules such as butylamine, donated electrons to In2O3 nanowires and thus led to enhanced carrier concentrations and conductance, whereas molecules with nitro groups such as butyl nitrite made In2O3 nanowires less conductive by withdrawing electrons. In addition, intrananowire junctions created by partial exposure of the nanowire device to butyl nitrite were investigated, and pronounced rectifying current-voltage characteristics were obtained. Furthermore, chemical gating by low-density lipoprotein cholesterol, the offending agent in coronary heart diseases, was also observed and attributed to the amino groups carried by the bio species. (C) 2003 American Institute of Physics.