二硫化钼场效应晶体管非特异性检测研究
首发时间:2019-05-20
摘要:本文通过构建超薄二硫化钼场效应晶体管生物传感器非特异性检测牛血清白蛋白,二硫化钼表面不加氧化层直接利用其疏水性物理吸附牛血清白蛋白。通过电学检测在大的浓度范围内高灵敏度成功检测到生物分子,此外,通过拉曼表征结合电学性质分析浓度依赖性传感行为和二硫化钼场效应晶体管电导率调制相关的潜在机制。结果表明掺杂效应(电荷转移)和迁移率变化(散射位点)协同作用解释二硫化钼表面上吸附牛血清白蛋白导致电流减少的传感机制。
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Non-specific detection of molybdenum disulfide field-effect transistor
Abstract:In this paper,a field-effect transistor biosensor based on ultrathin two-dimensional molybdenum disulfidewas constructed to non-specific detection of bovine serum albumin. The surface of molybdenum disulfide without oxide layer was directly adsorbed by its hydrophobic physical adsorption of bovine serum albumin. This transistor can successfully detect biomolecules by electrical with high sensitivity within a large concentration range. In addition, the potential mechanisms associated with concentration-dependent sensing behavior and conductivity modulation of molybdenum disulfide FETs were analyzed by Raman combined with electrical properties. The results showed that the synergistic effect of doping effect (charge transfer) and mobility change (scattering site) explains the sensing mechanism of the current reduction caused by adsorption of bovine serum albumin on the surface of molybdenum disulfide.
Keywords: Ultrathin molybdenum disulfide Field-effect transistor Biosensor Sensing mechanism
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