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中国科学院昆明植物所“十一五”期间国家自然科学基金管理工作综述 期刊论文  OAI收割
中国科学基金, 2012, 期号: 1, 页码: 46-48,51
李晓贤; 李志坚
收藏  |  浏览/下载:32/0  |  提交时间:2012/09/12
科学创新谱新篇,追求真理无止境——施雅风主编的《中国第四纪冰川新论》评介 期刊论文  OAI收割
冰川冻土, 2011, 期号: 06, 页码: 1444-1446
沈永平
收藏  |  浏览/下载:18/0  |  提交时间:2013/02/05
骆驼、牛、羊、人乳中维生素C含量测定与比较 期刊论文  OAI收割
中兽医医药杂志, 2009, 卷号: 2009, 期号: 06, 页码: 35-37
王曙阳; 梁剑平; 魏恒; 邵武军; 华兰英
  |  收藏  |  浏览/下载:17/0  |  提交时间:2010/10/29
铯原子钟的黑体辐射频移 会议论文  OAI收割
2005年全国时间频率学术交流会, 中国西安, 2005
张首刚; A.Clairon
收藏  |  浏览/下载:17/0  |  提交时间:2012/10/19
Fabrication and electron emission of carbon microtubes (EI CONFERENCE) 会议论文  OAI收割
Technical Digest of the 18th International Vacuum Nanoelectronics Conference, IVNC 2005, July 10, 2005 - July 14, 2005, Oxford, United kingdom
作者:  
Liu L.;  Liu L.;  Wang W.;  Wang W.
收藏  |  浏览/下载:40/0  |  提交时间:2013/03/25
Carbon nanotubes have been attracting attention because of their unique physical properties and their application potential for field emission cathode. Carbon nanotubes possess the following properties favorable for field emission material  such as a high aspect ratio and sharp tip  high chemical stability  high mechanical strength  stable at high temperature. Some research works on carbon nanotubes field emitter and field emission display have been reported. Here  a kind of carbon microtubes and its field emission properties are introduced. They have some different properties with carbon nanotubes  and the density is lower than carbon nanotubes bundles. These carbon microtubes are directly synthesized by liquidoid epitaxy method on silicon substrates at low temperature. The field emission properties of carbon microtubes are reported too. Carbon microtubes film is synthesized in liquid by electrolysis. The graphite plate is as anode  and n-silicon substrate with resistivity of 4-8 cm is as cathode. The electrolysis current is about 5-8mA/cm2  and applied voltage is 800-1500V. Temperatures of the methanol base solution is maintained at 60C in process of deposition of carbon microtubes. Carbon microtubes film is observed by scanning electron microscopy(SEM)  as shown in fig.1(a  b). The wall's thickness of carbon microtube is about 60nm. The diameter of carbon microtube is about 0.8 m. Raman spectrum of carbon microtubes film shows the two peaks at 1342and 1560cm-1. The field emission properties of carbon microtubes are measured in high vacuum chamber(10-5Pa). The emission area of carbon microtubes is 0.5cm 0.5cm. The threshold of field emission of the carbon microtubes film is about 3.6V/ m. Field emission property of carbon microtubes film is shown in fig.2. Another  when the electric field between anode and cathode is 10V/ m  the electric field distribution on single carbon microtube is also given after calculation according to electric field theory. Fig 3 shows that electric field distribution vertical section on the of single carbon microtube top with 2 m of highness. These results may help us to understand field emission properties of carbon microtubes. According to research results  it is found that liquidoid synthesis is simple method to produce carbon microtubes cold cathode material  and the carbon microtubes have better field emission properties. 2005 IEEE.  
森林流域洪涝灾害成因分析与防治对策 期刊论文  OAI收割
中国减灾, 1996, 期号: 03, 页码: 139-141
作者:  
孙铁珩,裴铁璠,张吉娜
  |  收藏  |  浏览/下载:14/0  |  提交时间:2011/05/05
森林流域洪涝灾害成因分析与防治对策 期刊论文  OAI收割
中国减灾, 1996, 期号: 03, 页码: 139-141
孙铁珩,裴铁璠,张吉娜
收藏  |  浏览/下载:32/0  |  提交时间:2011/05/05
时间有关的广义谐振子与外场的相互作用 SU(1,1)(?)h(3)线性非自治量子系统的严格解 期刊论文  OAI收割
物理学报, 1995, 期号: 09
左维; 王顺金
  |  收藏  |  浏览/下载:15/0  |  提交时间:2011/09/23
激光扫描钢材在线检测仪研究 期刊论文  OAI收割
测试技术学报, 1994, 期号: 01, 页码: 27-33
安志勇; 赵铁钧; 田雯; 李成志
收藏  |  浏览/下载:12/0  |  提交时间:2013/03/11