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北京石油化工学院2026年研究生招生接收调剂公告
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dsx990

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[交流] 【讨论】请教hydrogen-terminated Si(111)的H是从哪儿来的

请问 hydrogen-terminated Si(111)的H是从哪儿来的?我不懂,请赐教。是本身的,还是?又如何处理?
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xiang-h-b

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2楼2009-07-05 09:48:31
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peak1928

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dsx990(金币+1,VIP+0):谢谢 7-8 08:47
不可能是水中的,即使是水中的也应该是羟基
3楼2009-07-05 17:07:55
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zchao85

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请勿胡乱作答
好好的好好的好好
4楼2009-07-06 00:11:50
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andychan

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dsx990(金币+2,VIP+0): 7-8 08:47
A hydrogen-terminated silicon surface is a chemically passivated silicon substrate whose native oxide (SiO2) thin film is removed by etching in hydrogen fluoride aqueous solution, leaving the surface silicon atoms covalently bonded to hydrogen.

Since all surface Si atoms are fully co-ordinated, hydrogen termination leads to enhanced stability in ambient environments unlike a 'clean surface' having unpassivated surface atoms, or dangling bonds. It is so inert that it can be handled in the air without any special care for several minutes.

A hydrogen-terminated silicon surface has another excellent property: it can be flattened at the atomic level by etching. For example, to etch a hydrogen-terminated silicon(111) surface, ammonium fluoride aqueous solution or boiling water is usually used.

Like other silyl groups of organic compounds, the H-Si groups on the surface react with molecules that have terminal unsaturated bonds or diazo groups. The reaction is called hydrosilylation. Many kinds of organic compounds with various functions can be introduced onto the silicon surface by the hydrosilylation of a hydrogen-terminated surface.

Silicon is the Earth's second most abundant chemical element, and today high-purity silicon crystals are mass-produced. Consequently, hydrogen-terminated silicon surfaces are a promising material as a compound of organic and inorganic substances.

Retrieved from "http://en.wikipedia.org/wiki/Hydrogen-terminated_silicon_surface"
Categories: Materials
5楼2009-07-06 00:40:13
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