Synthesis and characterization of Au@Co and Au@Ni core-shell nanoparticles and their applications in surface-enhanced Raman Spectroscopy

被引：83

作者：

Bao, Fang ^{[1
]}

Li, Jian-Feng ^{[2
,3
]}

Ren, Bin ^{[2
,3
]}

Yao, Jian-Lin ^{[1
]}

Gu, Ren-Ao ^{[1
]}

Tian, Zhong-Qun ^{[2
,3
]}

机构：

[1] Suzhou Univ, Dept Chem, Suzhou 215006, Peoples R China

[2] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[3] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 02期

关键词：

D O I：

10.1021/jp075844k

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：

Au@Co and Au@Ni core-shell nanoparticles with controllable shell thicknesses were prepared by reduction of Co2+ and Ni2+ salts with hydrazine hydrate in ethanol over preformed An seeds. Both cyclic voltammetric and surface-enhanced Raman studies using CO as the probe molecule confirmed the core-shell structure of the synthesized nanoparticles. The Au@Co and Au@Ni nanoparticles dispersed on a glassy carbon electrode surface exhibit high surface-enhanced Raman scattering (SERS) effect for the adsorbed pyridine. High-quality SERS spectra of CO absorbed on Co and Ni have been obtained through the high enhancement of the core-shell nanoparticles. The originally low surface enhancement of the Co and Ni can be substantially improved giving total enhancement factors up to 10(3)-10(4). Such a SERS-active substrate can be used as an alternative substrate for investigating adsorption and reactions occurring on the Co and Ni metal surfaces.

引用

页码：345 / 350

页数：6

共 37 条

[1]

ANDRZEJ K, 2004, CHEM PHYS LETT, V383, P76

[2] THE INTERACTION BETWEEN ELECTROMAGNETIC RESONANCES AND ITS ROLE IN SPECTROSCOPIC STUDIES OF MOLECULES ADSORBED ON COLLOIDAL PARTICLES OR METAL SPHERES [J].

ARAVIND, PK ;

NITZAN, A ;

METIU, H .

SURFACE SCIENCE, 1981, 110 (01) :189-204

[3] Magnetic ion-exchange nano- and microparticles for medical, biochemical and molecular biological applications [J].

Bergemann, C ;

Müller-Schulte, D ;

Oster, J ;

à Brassard, L ;

Lübbe, AS .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 194 (1-3) :45-52

[4] Nanoparticles with Raman spectroscopic fingerprints for DNA and RNA detection [J].

Cao, YWC ;

Jin, RC ;

Mirkin, CA .

SCIENCE, 2002, 297 (5586) :1536-1540

[5] Magnetic-field-induced assemblies of cobalt nanoparticles [J].

Cheng, GJ ;

Romero, D ;

Fraser, GT ;

Walker, ARH .

LANGMUIR, 2005, 21 (26) :12055-12059

[6] THE INDUCTION OF SERS ON SMOOTH AG BY THE DEPOSITION OF NI AND CO [J].

FLEISCHMANN, M ;

TIAN, ZQ .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1987, 217 (02) :411-416

[7] CONTROLLED NUCLEATION FOR REGULATION OF PARTICLE-SIZE IN MONODISPERSE GOLD SUSPENSIONS [J].

FRENS, G .

NATURE-PHYSICAL SCIENCE, 1973, 241 (105) :20-22

[8] Synthesis of cobalt nanoparticles in ethanol hydrazine alkaline system (EHAS) at room temperature [J].

Guo, F ;

Zheng, HG ;

Yang, ZP ;

Qian, YT .

MATERIALS LETTERS, 2002, 56 (06) :906-909

[9] Synthesis of Au@Pd core-shell nanoparticles with controllable size and their application in surface-enhanced Raman spectroscopy [J].

Hu, JW ;

Zhang, Y ;

Li, JF ;

Liu, Z ;

Ren, B ;

Sun, SG ;

Tian, ZQ ;

Lian, T .

CHEMICAL PHYSICS LETTERS, 2005, 408 (4-6) :354-359

[10] An investigation of the adsorption of pyrazine and pyridine on nickel electrodes by in situ surface-enhanced Raman spectroscopy [J].

Huang, QJ ;

Lin, XF ;

Yang, ZL ;

Hu, JW ;

Tian, ZQ .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2004, 563 (01) :121-131

← 1 2 3 4 →