| 查看: 2033 | 回复: 31 | ||
| 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 | ||
[交流]
上传一篇加州理工博士论文"Thermal Properties of Nano- and Microstructures“
|
||
|
（2004年） Abstract My work is on the experimental study of thermal conduction in nano and microscale structures. The work is divided into two parts. In the first part, we measure the thermal conductance of a suspended device from 4 to 40 K. The thermal conduction of a suspended, free-standing beam is analyzed to study the effect of phonon scattering on thermal conduction. We conclude that phonon scattering is much more severe in a nanoscale beam than bulk material. In the second part of the work, we proceed to dynamic measurement to measure the heat capacity of a suspended device. From that we study the origin of heat capacity of a silicon nitride membrane. We conclude that much of the heat capacity comes from the motional tunneling states of the ions. We use the device to demonstrate an ultrasensitive calorimeter with a very high resolution of 0.5 aJ/K. We conclude the work by applying the calorimeter to study the heat capacity of a thin adsorbed film of helium gas. |
回复此楼
下载了哦！！！！！！！！~········ 
10楼2008-07-15 13:49:39
hawkingxq
铁杆木虫 (正式写手)
- 应助: 9 (幼儿园)
- 金币: 16574.8
- 散金: 280
- 红花: 3
- 帖子: 835
- 在线: 219.2小时
- 虫号: 302191
- 注册: 2006-12-02
- 性别: GG
- 专业: 工程热物理相关交叉领域
2楼2008-07-14 15:58:57
jeffersonchang
捐助贵宾 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 83.3
- 帖子: 301
- 在线: 472.1小时
- 虫号: 284097
- 注册: 2006-10-08
- 专业: 金属材料的制备科学与跨学
4楼2008-07-14 19:08:43
kuku5837135
银虫 (正式写手)
- 应助: 8 (幼儿园)
- 金币: 489.9
- 散金: 89
- 红花: 1
- 帖子: 697
- 在线: 550小时
- 虫号: 552111
- 注册: 2008-04-28
- 专业: 介孔材料与催化
5楼2008-07-14 19:57:09
