| 查看: 662 | 回复: 4 | |||
| 当前主题已经存档。 | |||
leaflet22银虫 (小有名气)
|
[交流]
王中林又发science了
|
||
|
实验与计算模拟的完美结合 Science 9 June 2006: 1504-1508. Converting Ceria Polyhedral Nanoparticles into Single-Crystal Nanospheres Xiangdong Feng,1* Dean C. Sayle,2 Zhong Lin Wang,3,4,5* M. Sharon Paras,6 Brian Santora,1 Anthony C. Sutorik,6 Thi X. T. Sayle,2 Yi Yang,1 Yong Ding,3 Xudong Wang,3 Yie-Shein Her1 Ceria nanoparticles are one of the key abrasive materials for chemical-mechanical planarization of advanced integrated circuits. However, ceria nanoparticles synthesized by existing techniques are irregularly faceted, and they scratch the silicon wafers and increase defect concentrations. We developed an approach for large-scale synthesis of single-crystal ceria nanospheres that can reduce the polishing defects by 80% and increase the silica removal rate by 50%, facilitating precise and reliable mass-manufacturing of chips for nanoelectronics. We doped the ceria system with titanium, using flame temperatures that facilitate crystallization of the ceria yet retain the titania in a molten state. In conjunction with molecular dynamics simulation, we show that under these conditions, the inner ceria core evolves in a single-crystal spherical shape without faceting, because throughout the crystallization it is completely encapsulated by a molten 1- to 2-nanometer shell of titania that, in liquid state, minimizes the surface energy. The principle demonstrated here could be applied to other oxide systems. |
回复此楼» 猜你喜欢
欢迎发来filecode的Mz6后的代码验证其规律
已经有123人回复
-
今天基金会出结果吗？20260819
已经有13人回复
-
时间戳变了，能看出什么问题？
已经有16人回复
-
filecode，4个jtjc了
已经有13人回复
-
为什么余额宝的年化利率越来越低？主要原因有哪些？
已经有5人回复
-
今天放榜没戏了吧
已经有5人回复
-
今天放榜吗？
已经有15人回复
-
filecode=后面第一个是大写字母
已经有12人回复
-
2027广东省杰青
已经有10人回复
-
朋友圈看到的
已经有8人回复
xiaosan
荣誉版主 (著名写手)
Nanowires
- 应助: 0 (幼儿园)
- 贵宾: 2
- 金币: 3223.1
- 散金: 350
- 红花: 3
- 帖子: 1015
- 在线: 37.5小时
- 虫号: 120
- 注册: 2003-02-28
- 性别: GG
- 专业: 新型信息器件
2楼2006-06-09 10:40:16
3楼2006-06-09 21:49:11
4楼2006-06-09 23:10:07
5楼2006-06-10 20:02:14
