Results 291 to 300 of about 675,095 (343)

Field Emission and Electron Microscopy

Microscopy and Microanalysis, 2000
Abstract An overview and new results are presented of the investigations carried out in the last 5 years on nano-sized tips by means of electron microscopy, an electron optical bench, and computation.
Christopher John Edgcombe, Ugo Valdrè
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Field emission scanning electron microscope

Proceedings, annual meeting, Electron Microscopy Society of America, 1978
A compact type field emission scanning electron microscope (JSM-F15) has recently been developed (Fig. 1). Moreover, due to the simplicity of the electron optical column and the automatically controlled ultra high vacuum system, a good quality and high resolution image can easily be obtained.The electron optical column, which is shown in Fig.
R. Aihara, S. Saito, II. Kohinata, K. Ogura, H. Otsuji   +4 more
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Electron Field Emission from GaN Nanotip Pyramids

MRS Proceedings, 2003
ABSTRACTElectron field emission was measured from GaN nanotip pyramids formed by polarity-selective chemical etching in KOH solution. The GaN samples were grown by plasma-assisted molecular beam epitaxy and consisted of regions of Ga- and N-polar GaN grown at the same time.
Ng, Hock M., Shaw, Jonathan, Chowdhury, Aref, Weimann, Nils   +3 more
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Electron Field Emission Characteristics of Planar Field Emission Array with Diamondlike Carbon Electron Emitters

Japanese Journal of Applied Physics, 1999
The electron emission characteristics of planar field emission arrays (FEAs), containing undoped and boron-doped diamondlike carbon (DLC) films as emitters, were investigated. The planar DLC FEAs require only 13.3 V/µm to turn on the electron field emission, whereas the boron-doped planar DLC FEAs requires an even lower electric field (9.8 V/µm) to
Chin-Maw Lin, Shoou-Jinn Chang, Meiso Yokoyama, Feng-Yu Chuang, Chun-Hui Tsai, Wen-Chun Wang, I-Nan Lin   +6 more
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Lateral MEMS-Type Field Emission Electron Source

IEEE Transactions on Electron Devices, 2015
This paper describes a microelectromechanical-system-type field emission electron source fabricated as a planar silicon structure bonded with a glass substrate. It consists of a carbon nanotube cathode, beam formation electrodes, and silicon glass vacuum housing, all made in a uniform technological process.
Tomasz Grzebyk, Piotr Szyszka, Anna Gorecka-Drzazga, Jan A. Dziuban   +3 more
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Field electron emission from branched nanotubes film

Applied Surface Science, 2005
We describe the preparation and analyses of films composed of branched carbon nanotubes (CNTs). The CNTs were grown on a Ni catalyst film using chemical vapor deposition from a gas containing acetylene. From scanning electron microscope (SEM) and transmission electron microscope (TEM) analyses, the branched structure of the CNTs was determined; the ...
null Baoqing Zeng, null Shikai Tian, null Zhonghai Yang   +2 more
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Electron field emission from carbon

The 13th international winterschool on electronic properties of novel materials- science and technology of molecular nanostructures, 1999
Electron field emission from carbon nanotubes, nano-structured carbon, diamond and diamond-like carbon is reviewed, including experiments, models and applications.
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Electron Field Emission Properties of Closed Carbon Nanotubes

Physical Review Letters, 2003
Recent experiments have shown that carbon nanotubes exhibit excellent electron field emisson properties with high current densities at low electric fields. Here we present theoretical investigations that incorporate geometrical effects and the electronic structure of nanotubes. The electric field is dramatically enhanced near the cap of a nanotube with
Alper, Buldum, Jian Ping, Lu
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Electron Field Emission from Diamond

2014
The properties of diamond as they relate to field emission present a promising and interesting combination of strongly bonded carbon, low or negative electron affinity, radiation tolerance, and chemical inertness. Counter to expectations, diamond's 5.45 eV bandgap is an asset rather than a handicap when it comes to electron emission.
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Field electron emission from two-dimensional electron gas

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, 2005
The article presents a quantum mechanical model for the electron field emission from semiconductor surfaces covered by dielectric layers. By systematically connecting electronic wave functions at various interfaces, the model obtains in a unified manner the field emission current density from both clean and dielectric-covered semiconductor substrates ...
V. Filip, D. Nicolaescu, H. Wong, M. Nagao, P. L. Chu   +4 more
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