Surface-Enhanced Raman Scattering from Copper Nanoparticles Obtained by Laser Ablation

被引：142
|
作者：
Muniz-Miranda, Maurizio [1 ,4 ]
Gellini, Cristina [1 ,4 ]
Giorgetti, Emilia [2 ,3 ]
机构：
[1] Univ Florence, Dipartimento Chim Ugo Schiff, I-50019 Sesto Fiorentino, Italy
[2] CNR, INSTM, I-50019 Sesto Fiorentino, Italy
[3] CNR, ISC, I-50019 Sesto Fiorentino, Italy
[4] LENS, I-50019 Sesto Fiorentino, Italy
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 12期
关键词：
GOLD NANOPARTICLES; METAL COLLOIDS; OPTICAL-PROPERTIES; CU NANOPARTICLES; SERS; SPECTRA; SILVER; SIZE; OXIDE; SHAPE;
D O I：
10.1021/jp1086027
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：
Copper colloidal nanoparticles are obtained by laser ablation in aqueous solutions of ligands by nanosecond laser pulses at 532 and 1064 nm and examined by localized surface plasmon resonance (LSPR) and surface-enhanced Raman scattering (SERS) spectroscopy, along with transmission electron microscopy (TEM) and zeta potential measurements. This fabrication method, besides providing SERS-active substrates without spectral interferences of reagents, as it generally occurs for the chemical reduction of metal ions, allows obtaining colloidal suspensions which are stable in time because the copper particles are capped by ligand molecules as long as they are formed by laser ablation. This prevents aggregation among metal nanoparticles and probably reduces overall oxidation of the copper surface.
引用
收藏
页码：5021 / 5027
页数：7
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