Tuning Interior Nanogaps of Double-shelled Au/Ag Nanoboxes for Surface-Enhanced Raman Scattering

被引：62

作者：

Zhang, Weiqing ^{[1
]}

Rahmani, Mohsen ^{[2
]}

Niu, Wenxin ^{[1
]}

Ravaine, Serge ^{[3
]}

Hong, Minghui ^{[2
]}

Lu, Xianmao ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

[3] Univ Bordeaux, CNRS, Ctr Rech Paul Pascal, Pessac, France

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

关键词：

P-AMINOTHIOPHENOL; NANOPARTICLES; MOLECULE; AU; AG; 4-AMINOBENZENETHIOL; SERS; 4,4'-DIMERCAPTOAZOBENZENE; NANOCUBES; DIMERS;

D O I：

10.1038/srep08382

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Double-shelled Au/Ag hollow nanoboxes with precisely controlled interior nanogaps (1 to 16 nm) were synthesized for gap-tunable surface-enhanced Raman scattering (SERS). The double-shelled nanoboxes were prepared via a two-step galvanic replacement reaction approach using Ag nanocubes as the templates, while 4-aminothiolphenol (4-ATP) as SERS probe molecules were loaded between the two shells. More than 10-fold enhancement of SERS is observed from the double-shelled nanoboxes than Ag nanocubes. In addition, the SERS of the double-shelled nanoboxes increase significantly with the decrease of gap size, consistent with the theoretical prediction that smaller gap size induces larger localized electromagnetic enhancement.

引用

页数：6

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