Luminescent silicon nanocrystals produced by near-infrared nanosecond pulsed laser ablation in water

被引：31

作者：

Vaccaro, L. ^{[1
]}

Sciortino, L. ^{[1
]}

Messina, F. ^{[1
]}

Buscarino, G. ^{[1
]}

Agnello, S. ^{[1
]}

Cannas, M. ^{[1
]}

机构：

[1] Univ Palermo, Dipartimento Fis & Chim, I-90123 Palermo, Italy

来源：

APPLIED SURFACE SCIENCE | 2014年 / 302卷

关键词：

Laser ablation; Si-nanocrystal; Silica; Core-shell; Time-resolved luminescence; Atomic force microscopy; Micro-Raman; IR absorption; QUANTUM DOTS; LIQUID; SI; PHOTOLUMINESCENCE; NANOMATERIALS; CENTERS; BULK; BAND;

D O I：

10.1016/j.apsusc.2014.01.041

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：

We report the investigation of luminescent nanoparticles produced by ns pulsed Nd:YAG laser ablation of silicon in water. Combined characterization by AFM and IR techniques proves that these nanoparticles have a mean size of similar to 3 nm and a core-shell structure consisting of a Si-nanocrystal surrounded by an oxide layer. Time resolved luminescence spectra evidence visible and UV emissions; a band around 1.9 eV originates from Si-nanocrystals, while two bands centered at 2.7 eV and 4.4 eV are associated with oxygen deficient centers in the SiO2 shell. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：62 / 65

页数：4

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