选择具有半导体结合特异性的质,用于定向纳米晶体组件
S R Whaley1, D S English, E L Hu
1Department of Chemistry and Biochemistry, The University of Texas at Austin, 78712, USA.
Nature
|June 23, 2000
概括
研究人员设计了,以精确地结合半导体表面,模仿先进材料的生物自我组装. 这种基于的方法使得新型电子和光学设备的纳米尺度控制组装成为可能.
科学领域:
- 生物材料科学是生物材料的科学.
- 纳米技术 纳米技术
- 材料科学是一种材料科学.
背景情况:
- 生物系统利用有机分子来精确控制无机物质的形成和纳米级组装.
- 模仿生物自我组装是创建先进材料的关键目标,特别是用于电子和光学应用.
- 虽然生物分子与一些无机材料相互作用,但自然进化并没有有利于与半导体相互作用.
研究的目的:
- 为了进化能够与半导体表面特定结合的.
- 探索基于的组装在电子和光学材料的"自下而上的"制造方面的潜力.
主要方法:
- 利用组合性菌体显示库来选具有半导体结合能力的.
- 对各种半导体表面进行测试的特异性,考虑晶体学方向和组成.
主要成果:
- 成功进化了表现出高特异性的,用于与一系列的半导体表面结合.
- 证明结合取决于半导体的结晶学方向和组成.
- 展示了对电子设备相关材料的控制放置和组装的潜力.
结论:
- 组合性菌体显示对于专门与半导体表面结合的演化是有效的.
- 工程为"自下而上"制造中的材料的定向组装提供了一个有前途的途径.
- 这种方法可以通过精确的纳米控制来开发新的电子和光学设备.
相关概念视频
01:20Types of Semiconductors
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
01:26Imperfections in Crystal Structure: Stoichiometric Point Defects
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...