Effect of liquid level and laser power on the formation of spherical alumina nanoparticles by nanosecond laser ablation of alumina target

被引：25

作者：

Al-Mamun, Sharif Abdullah ^{[2
]}

Nakajima, Reiko ^{[3
]}

Ishigaki, Takamasa ^{[1
,2
,3
,4
]}

机构：

[1] Dept Chem Sci & Technol, Tokyo 1848584, Japan

[2] Hosei Univ, Res Ctr Micronano Technol, Tokyo 1840003, Japan

[3] Hosei Univ, Dept Chem Mat, Tokyo 1848584, Japan

[4] Natl Inst Mat Sci, Nano Ceram Ctr, Tsukuba, Ibaraki 3050044, Japan

来源：

THIN SOLID FILMS | 2012年 / 523卷

关键词：

Nanosecond laser ablation; Alumina; Liquid plasma; Size distributions; PARTICLES; PHASE; WATER; FLAME;

D O I：

10.1016/j.tsf.2012.06.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alumina nanoparticles (NPs) were synthesized by laser ablation of a bulk alpha-alumina (corundum) target immersed in distilled water using nanosecond laser pulses of 1064-nm wavelength. We investigated the effect of laser power and water column above the target. Synthesized particles were analyzed regarding particle shape and size distributions with scanning electron and transmission electron microscopy. Ablated NPs were spherical in shape and the average particle size ranged from 12 to 18 nm at varied laser power and water levels, although a very small number of melted droplets of submicron spheroids and irregular-shaped cracked particles were observed. X-ray diffraction analysis was conducted, which shows mainly the peaks of alpha-Al2O3 and minor peaks of gamma-Al2O3. Phase identification of NPs, using high-resolution transmission electron micrograph lattice images and fast Fourier transform exhibits both metastable gamma-Al2O3 and stable alpha-Al2O3 phases. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：46 / 51

页数：6

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