Nanoparticle Enhanced Laser Induced Breakdown Spectroscopy: Effect of nanoparticles deposited on sample surface on laser ablation and plasma emission

被引：116
作者：
De Giacomo, A. [1 ,2 ]
Gaudiuso, R. [1 ,2 ]
Koral, C. [1 ]
Dell'Aglio, M. [2 ]
De Pascale, O. [2 ]
机构：
[1] Univ Bari, Dept Chem, I-70126 Bari, Italy
[2] CNR IMIP, I-70126 Bari, Italy
来源：
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2014年 / 98卷
关键词：
Laser induced plasma; Nanoparticle; Laser ablation; Emission enhancement; LOCAL THERMODYNAMIC-EQUILIBRIUM; ELEMENTAL ANALYSIS; PULSE; LIBS;
D O I：
10.1016/j.sab.2014.05.010
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
In this paper the use of metallic nanoparticles (NPs) for improving Laser Induced Breakdown Spectroscopy (LIBS) is discussed. In the case of conductors an emission signal enhancement up to 1-2 orders of magnitude was obtained depositing NPs on the sample surface by drying a micro-drop of colloidal solution. The basic mechanisms of Nanoparticle Enhanced LIBS (NELIBS) were studied and the main causes of this significantly large enhancement were found to be related to the effect of NPs on the laser ablation process, in terms of a faster and more efficient production of seed electrons with respect to conventional LIBS. The characteristics of NELIBS-produced plasma were investigated by emission spectroscopy and spectrally resolved images. In spite of similar plasma parameters, the NELIBS plasma was found to have larger emission volume and longer persistence than the LIBS one. A method to determine NP concentration and size was also proposed, which involved depositing NPs on non-interacting substrates, and proved the feasibility of LIBS as a fast detection tool fora preliminary characterization of NPs. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：19 / 27
页数：9
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