纳米线超晶格结构的增长用于纳米级光子学和电子学
Mark S Gudiksen1, Lincoln J Lauhon, Jianfang Wang
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
Nature
|February 8, 2002
概括
研究人员合成了新的半导体纳米线超级网,使先进的纳米电子和光子设备成为可能. 这些结构为纳米级发光二极管和传感器等应用提供了增强的功能.
科学领域:
- 纳米技术纳米技术
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 半导体纳米线和碳纳米管是纳米电子和光子学的关键.
- 目前使用纳米线的设备在复杂性和功能方面存在局限性.
- 平面半导体技术利用超级网来实现多功能电子和光子功能.
研究的目的:
- 为了证明半导体纳米线超级网的合成.
- 探索创建复杂纳米结构的新方法.
- 为了研究这些超级格子在先进设备中的潜力.
主要方法:
- 在纳米线生长过程中,蒸汽相表达与调节的反应剂供应.
- 合成组合调制的超级格子 (例如,GaAs/GaP).
- 制造调制合的纳米线 (例如,n-Si/p-Si,n-InP/p-InP).
主要成果:
- 从III-V组和IV组材料中成功合成了半导体纳米线超级网.
- 准备好的超级网格,有2到21层的GaAs和GaP.
- 通过光发光,电传输和电光发光测量证明了独特的光子和电子特性.
结论:
- 半导体纳米线超级网格为先进的应用提供了独特的特性.
- 这些结构可以为纳米电子和光子学中的各种功能量身定制.
- 潜在的应用包括纳米条形码和极化纳米级LED.
相关概念视频
Super-resolution Fluorescence Microscopy
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Overview of Electron Microscopy
The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.


