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通过无机结剂序列设计调节半导体表面电子特性.

Maayan Matmor1, Nurit Ashkenasy

  • 1Department of Materials Engineering and the Ilze Katz Institute for Nanoscale Science and Technology, Ben Gurion University of the Negev, Beer-Sheva, Israel.

Journal of the American Chemical Society
|November 29, 2012
PubMed
概括

单个氨基酸的身份和中的位置显著改变了半导体的电子特性. 这种-表面相互作用调整是开发新型混合电子设备和生物传感器的关键.

科学领域:

  • 材料科学 材料科学 材料科学
  • 生物物理学的生物物理.
  • 表面科学是一门学科.

背景情况:

  • 蛋白质和质越来越多地用于生物传感器和电子设备.
  • 生物有机-无机接口极大地影响了设备的性能,但其电子特征尚不清楚.

研究的目的:

  • 研究序中的单氨基酸修饰如何影响半导体表面的电子性质.
  • 探索类作为混合电子设备的构建块的潜力.

主要方法:

  • 合成的片段具有特定的氨基酸替代物 (tyrosine,tryptophan),旨在与GaAs (100) 表面结合.
  • 使用表面科学技术分析了半导体电子亲和力和表面潜力的变化.
  • 研究了依赖序列的效应和氨基酸位置对电子调制的影响.

主要成果:

  • 将芳香氨基酸 (tyrosine,tryptophan) 引入序列,显著改变了GaAs的电子亲和力和表面潜力.
  • 氨基酸在序列中的位置和身份显然影响了电子性质变化的程度.
  • 与头尾结合相比,当芳香氨基酸被整合到序列中时,观察到的效应更为明显.

结论:

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  • 蛋白质的结构功能关系即使在非自然电子应用的短中也保持不变.
  • 类提供了一个可调节的平台,用于在生物有机-无机接口上修改半导体电子特性.
  • 类是创建先进的混合电子设备和生物传感器的有希望的组件.