非氧化,甲基终结纳米线的电气特性和化学稳定性
Hossam Haick1, Patrick T Hurley, Allon I Hochbaum
1Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 127-72, 1200 East California Boulevard, Pasadena, California 91125, USA.
Journal of the American Chemical Society
|July 13, 2006
概括
合功能纳米线 (Si NWs) 提供了极好的大气稳定性和高性能. 这些修改后的Si NW可以创建强大的,空气稳定的场效应晶体管 (FET),具有优异的开关比率.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 半导体物理 半导体物理
背景情况:
- 纳米线 (Si NWs) 对电子设备具有前景,但经常遭受表面氧化和不稳定.
- 实现基于Si NW的稳定和高性能电子产品需要有效的表面被动化策略.
研究的目的:
- 为了研究与共价Si-CH3组功能化的纳米线的大气稳定性和电子特性.
- 为了证明使用这些修改的Si NWs的场效应晶体管 (FET) 的制造和性能.
主要方法:
- 用甲基 (CH3) 组对Si NW表面进行共价修饰,消除中间的氧化物层.
- 使用功能化纳米线制造Si NW场效应晶体管 (FET).
- 在环境条件下,Si NW FETs的电气特性.
主要成果:
- Si-CH3功能化的Si NWs在没有降解的情况下表现出了显著的大气稳定性.
- 观察到高导电值和显著减少的表面缺陷水平.
- 成功制造了稳定于空气的Si NW FET,实现了超过105.5的开关比率.
- 晶体管在 +/-2 V 的小门电压波动中有效运行.
结论:
- 协价Si-CH3功能化为纳米线提供了有效的被动化,提高了它们的稳定性和电子性能.
- 这种方法可以开发用于电子应用的高度稳定和高效的Si NW场效应晶体管.
- 结果突出了在环境环境中实现强大的基于纳米线的设备的可行途径.
相关概念视频
03:06Alkali Metals
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
02:18Network Covalent Solids
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03:18Nuclear Stability
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02:58Properties of Transition Metals
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01:08Covalent Bonds
Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally, creating polar bonds.
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01:29Electrical Transport
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