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

页码：1 / 4

页数：4

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