Laser-assisted nanostructuring of Tungsten in liquid environment

被引：25

作者：

Barmina, E. V. ^{[1
]}

Stratakis, E. ^{[2
,4
]}

Barberoglou, M. ^{[2
,3
]}

Stolyarov, V. N. ^{[5
]}

Stolyarov, I. N. ^{[5
]}

Fotakis, C. ^{[2
,3
]}

Shafeev, G. A. ^{[1
]}

机构：

[1] Russian Acad Sci, AM Prokhorov Gen Phys Inst, Wave Res Ctr, Moscow 119991, Russia

[2] Hellas IESL FORTH, Fdn Res & Technol, Inst Elect Struct & Laser, 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 SURFACE SCIENCE | 2012年 / 258卷 / 15期

基金：

俄罗斯基础研究基金会;

关键词：

Laser; Tungsten; Liquid; Nanostructures; Ripples; Work function; ABLATION; GENERATION; NANOSPIKES;

D O I：

10.1016/j.apsusc.2012.02.135

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Formation of surface nanostructures on Tungsten target immersed into liquids is experimentally studied under its exposure to femtosecond laser pulses with different durations. In particular, nanotexturing of Tungsten upon its exposure to delayed femtosecond pulses is investigated. Two different types of morphological features are observed, namely periodic ripples and nanostructures. Field emission scanning electron microscopy shows that the density of nanostructures as well as their morphology depends on the time delay between pulses and reaches its maximum at 1 ps delay. Thermionic emission of nanostructured W cathode is investigated. The work function of nanostructured W surface is measured to be 0.3 eV lower than that of the pristine surface. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：5898 / 5902

页数：5

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