| 查看: 458 | 回复: 4 | |||
| 当前主题已经存档。 | |||
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
085600 材料与化工 329分求调剂
已经有13人回复
-
一志愿南昌大学324求调剂
已经有4人回复
-
085601材料工程找调剂
已经有12人回复
-
求调剂
已经有4人回复
-
一志愿南航 335分 | 0856 | GPA 4.07 | 有科研经历
已经有7人回复
-
求调剂
已经有10人回复
-
化学工程085602 305分求调剂
已经有18人回复
-
一志愿双一流机械285分求调剂
已经有5人回复
-
一志愿：西北大学，英一数一408-284分求调剂
已经有4人回复
-
291求调剂
已经有5人回复
xiang-h-b
金虫 (著名写手)
博士
- PEPI: 4
- 应助: 7 (幼儿园)
- 贵宾: 0.096
- 金币: 3481.1
- 散金: 50
- 红花: 3
- 帖子: 1053
- 在线: 70.4小时
- 虫号: 648567
- 注册: 2008-11-07
- 性别: GG
- 专业: 纤维
- 管辖: 功能材料
2楼2009-07-05 09:48:31
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
★ ★
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
6