Generation of Al nanoparticles via ablation of bulk Al in liquids with short laser pulses

被引：148

作者：

Stratakis, Emmanuel ^{[1
,2
]}

Barberoglou, Marios ^{[1
,3
]}

Fotakis, Costas ^{[1
,3
]}

Viau, Guillaume ^{[4
]}

Garcia, Cecile ^{[4
]}

Shafeev, Georgy A. ^{[5
]}

机构：

[1] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Greece

[2] Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Greece

[3] Univ Crete, Dept Phys, Iraklion 71409, Greece

[4] INSA Toulouse, CNRS, Lab Phys & Chim Nanoobjets, F-31077 Toulouse, France

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

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 15期

基金：

俄罗斯基础研究基金会;

关键词：

ALUMINUM NANOPARTICLES; SURFACE; NANOPOWDERS; SIZE; PASSIVATION; ULTRAVIOLET; CARBON;

D O I：

10.1364/OE.17.012650

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Highly stable aluminum nanoparticles (NPs) are generated via ablation of bulk Al in ethanol using either femtosecond (fs) or picosecond (ps) laser sources. The colloidal NPs solutions obtained with fs pulses exhibit a yellow coloration and show an increased optical absorption between 300 and 400 nm, tentatively assigned to the plasmon resonance of nanosized Al. The corresponding solutions after ps ablation are gray colored and opalescent. The average size of the NPs formed ranges from 20 nm for the fs case to 60 nm for the ps case, while a narrower distribution is obtained using the shorter pulses. High Resolution Transmission Electron Microscopy (HRTEM) studies indicate that the NPs are mostly amorphous with single crystalline inclusions. Al NPs generated with short laser pulses slowly react with air oxygen due to the presence of a native oxide cladding, which efficiently passivates their surface against further oxidation. (C) 2009 Optical Society of America

引用

页码：12650 / 12659

页数：10

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