Morphological control and plasmonic tuning of nanoporous gold disks by surface modifications

Jianbo Zeng; Fusheng Zhao; Ming Li; Chien-Hung Li; T. Randall Lee; Wei-Chuan Shih

doi:10.1039/c4tc02328e

Morphological control and plasmonic tuning of nanoporous gold disks by surface modifications

Jianbo Zeng, Fusheng Zhao, Ming Li, Chien-Hung Li, T. Randall Lee, Wei-Chuan Shih

Research output: Contribution to journal › Article › peer-review

52 Citations (Scopus)

Abstract

We report a surface modification protocol to control nanoporous gold (NPG) disk morphology and tune its plasmonic resonance. Enlarged pore size up to ∼20 nm within 60 s dealloying time has been achieved by adsorbing halides onto alloy surfaces in-between two dealloying steps. In addition, plasmonic resonance has been significantly red-shifted by up to ∼258 nm by the surface modification. Furthermore, with the enlarged pore size, small gold nanoparticles have been effectively loaded into the pores to enhance the performance of surface-enhanced Raman scattering (SERS) due to hot spot formation between the original nanoporous network and loaded nanoparticles.

Original language	English
Pages (from-to)	247-252
Number of pages	6
Journal	Journal of Materials Chemistry C
Volume	3
Issue number	2
DOIs	https://doi.org/10.1039/c4tc02328e
Publication status	Published - 14 Jan 2015
Externally published	Yes

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abstract = "We report a surface modification protocol to control nanoporous gold (NPG) disk morphology and tune its plasmonic resonance. Enlarged pore size up to ∼20 nm within 60 s dealloying time has been achieved by adsorbing halides onto alloy surfaces in-between two dealloying steps. In addition, plasmonic resonance has been significantly red-shifted by up to ∼258 nm by the surface modification. Furthermore, with the enlarged pore size, small gold nanoparticles have been effectively loaded into the pores to enhance the performance of surface-enhanced Raman scattering (SERS) due to hot spot formation between the original nanoporous network and loaded nanoparticles.",

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AU - Zeng, Jianbo

AU - Zhao, Fusheng

AU - Li, Ming

AU - Li, Chien-Hung

AU - Lee, T. Randall

AU - Shih, Wei-Chuan

PY - 2015/1/14

Y1 - 2015/1/14

N2 - We report a surface modification protocol to control nanoporous gold (NPG) disk morphology and tune its plasmonic resonance. Enlarged pore size up to ∼20 nm within 60 s dealloying time has been achieved by adsorbing halides onto alloy surfaces in-between two dealloying steps. In addition, plasmonic resonance has been significantly red-shifted by up to ∼258 nm by the surface modification. Furthermore, with the enlarged pore size, small gold nanoparticles have been effectively loaded into the pores to enhance the performance of surface-enhanced Raman scattering (SERS) due to hot spot formation between the original nanoporous network and loaded nanoparticles.

AB - We report a surface modification protocol to control nanoporous gold (NPG) disk morphology and tune its plasmonic resonance. Enlarged pore size up to ∼20 nm within 60 s dealloying time has been achieved by adsorbing halides onto alloy surfaces in-between two dealloying steps. In addition, plasmonic resonance has been significantly red-shifted by up to ∼258 nm by the surface modification. Furthermore, with the enlarged pore size, small gold nanoparticles have been effectively loaded into the pores to enhance the performance of surface-enhanced Raman scattering (SERS) due to hot spot formation between the original nanoporous network and loaded nanoparticles.

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Morphological control and plasmonic tuning of nanoporous gold disks by surface modifications

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