Nano-textured W shows improvement of thermionic emission properties

被引：29
|
作者：
Barmina, E. V. [1 ]
Serkov, A. A. [1 ]
Stratakis, E. [2 ,4 ]
Fotakis, C. [2 ,3 ]
Stolyarov, V. N. [5 ]
Stolyarov, I. N. [5 ]
Shafeev, G. A. [1 ]
机构：
[1] Russian Acad Sci, Wave Res Ctr AM Prokhorov, Inst Gen Phys, Moscow 119991, Russia
[2] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, IESL FORTH, Iraklion 71110, Greece
[3] Univ Crete, Dept Phys, Iraklion 71409, Greece
[4] Univ Crete, Mat Sci & Technol Dept, Iraklion 71003, Greece
[5] Roentgenprom, Protvino 1442281, Moscow Region, Russia
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2012年 / 106卷 / 01期
关键词：
LASER-ABLATION; NANOSTRUCTURES; SURFACE; WATER;
D O I：
10.1007/s00339-011-6692-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Laser-assisted nano-texturing of W substrates cathodes via ablation in liquid environment is experimentally realized. Two laser sources are used, either a Ti:sapphire femtosecond laser or a Nd:YAG laser with pulse duration of 350 ps. Laser exposure of W results in the formation of hemi-spherical nanostructures situated on top of periodic ripples. Nano-textured thermionic W cathode demonstrates the decrease of the efficient work function by 0.3 eV compared to pristine surface.
引用
收藏
页码：1 / 4
页数：4
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