Au/Ag bimetal nanogap arrays with tunable morphologies for surface-enhanced Raman scattering

被引：19

作者：

Wang, Yaxin ^{[1
]}

Zhao, Xiaoyu ^{[1
]}

Gao, Wenting ^{[1
]}

Chen, Lei ^{[1
]}

Chen, San ^{[3
]}

Wei, Maobin ^{[1
]}

Gao, Ming ^{[1
]}

Wang, Cong ^{[1
]}

Zhang, Yongjun ^{[1
]}

Yang, Jinghai ^{[1
,2
]}

机构：

[1] Jilin Normal Univ, Key Lab Funct Mat Phys & Chem, Minist Educ, Siping 136000, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Phys, Changchun 130033, Peoples R China

[3] Huaibei Normal Univ, Huaibei 235000, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 10期

关键词：

SINGLE-MOLECULE; SILVER; SERS; AG; SPECTRA; DIMERS; AU;

D O I：

10.1039/c4ra10882e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

When Au and Ag were deposited onto two-dimensional polystyrene (PS) templates, a curved bimetallic film composed of nanocap-shaped Au/Ag units was formed. The "Y"-shaped nanogaps and "V"-shaped junctions were tailored between the neighbour nanocaps by changing the bilayer thickness and PS diameters. Compared to the curved Ag, the curved Au monolayer and the flat Au/Ag bilayer on a silicon wafer, the curved Au/Ag bimetallic film exhibited significant SERS enhancement, which was mainly attributed to two important factors, the nanogaps between the adjacent Au/Ag nanocaps and the composite of the Ag/Au bimetallic film. And the nanogaps generated extremely intense local electromagnetic fields and the composite provided more possibilities for the residence of probing molecules.

引用

页码：7454 / 7460

页数：7

共 37 条

[1] ANOMALOUSLY INTENSE RAMAN-SPECTRA OF PYRIDINE AT A SILVER ELECTRODE [J].

ALBRECHT, MG ;

CREIGHTON, JA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1977, 99 (15) :5215-5217

[2] Chemically patterned microspheres for controlled nanoparticle assembly in the construction of SERS hot spots [J].

Braun, Gary ;

Pavel, Ioana ;

Morrill, Andrew R. ;

Seferos, Dwight S. ;

Bazan, Guillermo C. ;

Reich, Norbert O. ;

Moskovits, Martin .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (25) :7760-+

[3] Sorting of Enhanced Reference Raman Spectra of a Single Amino Acid Molecule [J].

Brule, Thibault ;

Yockell-Lelievre, Helene ;

Bouhelier, Alexandre ;

Margueritat, Jeremie ;

Markey, Laurent ;

Leray, Aymeric ;

Dereux, Alain ;

Finot, Eric .

JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (31) :17975-17982

[4] Investigation of surface-enhanced Raman scattering from platinum electrodes using a confocal Raman microscope: dependence of surface roughening pretreatment [J].

Cai, WB ;

Ren, B ;

Li, XQ ;

She, CX ;

Liu, FM ;

Cai, XW ;

Tian, ZQ .

SURFACE SCIENCE, 1998, 406 (1-3) :9-22

[5] Probing the structure of single-molecule surface-enhanced Raman scattering hot spots [J].

Camden, Jon P. ;

Dieringer, Jon A. ;

Wang, Yingmin ;

Masiello, David J. ;

Marks, Lawrence D. ;

Schatz, George C. ;

Van Duyne, Richard P. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (38) :12616-+

[6] Green Synthesis of Large-Scale Highly Ordered Core@Shell Nanoporous Au@Ag Nanorod Arrays as Sensitive and Reproducible 3D SERS Substrates [J].

Chen, Bin ;

Meng, Guowen ;

Huang, Qing ;

Huang, Zhulin ;

Xu, Qiaoling ;

Zhu, Chuhong ;

Qian, Yiwu ;

Ding, Yi .

ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (18) :15667-15675

[7] Measuring Ensemble-Averaged Surface-Enhanced Raman Scattering in the Hotspots of Colloidal Nanoparticle Dimers and Trimers [J].

Chen, Gang ;

Wang, Yong ;

Yang, Miaoxin ;

Xu, Jun ;

Goh, Sook Jin ;

Pan, Ming ;

Chen, Hongyu .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (11) :3644-+

[8] Surface-enhanced Raman scattering (SERS) from Au:Ag bimetallic nanoparticles: the effect of the molecular probe [J].

Fan, Meikun ;

Lai, Feng-Ju ;

Chou, Hung-Lung ;

Lu, Wan-Ting ;

Hwang, Bing-Joe ;

Brolo, Alexandre G. .

CHEMICAL SCIENCE, 2013, 4 (01) :509-515

[9] Free-Standing Optical Gold Bowtie Nanoantenna with Variable Gap Size for Enhanced Raman Spectroscopy [J].

Hatab, Nahla A. ;

Hsueh, Chun-Hway ;

Gaddis, Abigail L. ;

Retterer, Scott T. ;

Li, Jia-Han ;

Eres, Gyula ;

Zhang, Zhenyu ;

Gu, Baohua .

NANO LETTERS, 2010, 10 (12) :4952-4955

[10] Electrochemical deposition of silver in room-temperature ionic liquids and its surface-enhanced Raman scattering effect [J].

He, P ;

Liu, HT ;

Li, ZY ;

Liu, Y ;

Xu, XD ;

Li, JH .

LANGMUIR, 2004, 20 (23) :10260-10267

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