| 查看: 456 | 回复: 4 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
dsx990新虫 (著名写手)
|
[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？ |
回复此楼» 猜你喜欢
085601材料工程找调剂
已经有11人回复
-
总分293求调剂
已经有9人回复
-
334分 一志愿武理 材料求调剂
已经有5人回复
-
327求调剂
已经有6人回复
-
329求调剂
已经有10人回复
-
275求调剂
已经有15人回复
-
291求调剂
已经有6人回复
-
309求调剂
已经有7人回复
-
297求调剂
已经有11人回复
-
一志愿南航 335分 | 0856 | GPA 4.07 | 有科研经历
已经有6人回复
★ ★
dsx990(金币+2,VIP+0): 7-8 08:47
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
3楼2009-07-05 17:07:55
zchao85
木虫 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 1600.6
- 散金: 19
- 红花: 2
- 沙发: 2
- 帖子: 443
- 在线: 8.8小时
- 虫号: 639723
- 注册: 2008-10-29
- 性别: GG
- 专业: 涂料
4楼2009-07-06 00:11:50
