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Tuning interior nanogaps of double-shelled Au/Ag nanoboxes for surface-enhanced Raman scattering.

ABSTRACT: 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.

SUBMITTER: Zhang W

PROVIDER: S-EPMC4323660 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature

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Tuning interior nanogaps of double-shelled Au/Ag nanoboxes for surface-enhanced Raman scattering.

Zhang Weiqing W Rahmani Mohsen M Niu Wenxin W Ravaine Serge S Hong Minghui M Lu Xianmao X

Scientific reports 20150211

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. ...[more]

PMID: 25670352

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