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会议论文 [4]
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2005 [4]
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力学 [1]
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发表日期:2005
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“Deborah Numbers”, Coupling Multiple Space and Time Scales and Governing Damage Evolution to Failure
会议论文
The Seventh International Conference on Mesomechanics
作者:
Wang HY(汪海英)
;
Wang HY(汪海英)
;
Ke FJ
;
Bai YL(白以龙)
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浏览/下载:1368/95
  |  
提交时间:2007/12/18
Fabrication and electron emission of carbon microtubes (EI CONFERENCE)
会议论文
Technical Digest of the 18th International Vacuum Nanoelectronics Conference, IVNC 2005, July 10, 2005 - July 14, 2005, Oxford, United kingdom
Wang W.
;
Xia Y.
;
Lei D.
;
Chen S.
;
Liu L.
;
Chen M.
;
Liang J.
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  |  
浏览/下载:29/0
  |  
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.
Hybrid Approach for Computation of Tonal Noise Applied to High-Bypass Ratio Fan Stage
会议论文
ISABE, 2005
A.M.Sipatov
;
M.V.Usanin
;
V.G.Avgustinovich
;
N.O.Chuhlantseva
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浏览/下载:8/0
  |  
提交时间:2013/09/04
Electroabsorption-modulated DFB laser integrated with dual-waveguide spot-size converter - art. no. 60200N
会议论文
conference on optoelectronic materials and devices for optical communications, shanghai, peoples r china, nov 07-10, 2005
Hou, LP
;
Wang, W
;
Zhu, HL
;
Wang, BJ
;
Zhou, F
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  |  
浏览/下载:121/31
  |  
提交时间:2010/03/29
DFB laser diode
electroabsorption modulator
spot-size converters
selective area growth
quantum well intermixing
dual-core structure
MONOLITHIC INTEGRATION
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