Tuning localized surface plasmon resonance of nanoporous gold with a silica shell for surface enhanced Raman scattering

Wei Li; Chao Ma; Ling Zhang; Bin Chen; Luyang Chen; Heping Zeng

doi:10.3390/nano9020251

Tuning localized surface plasmon resonance of nanoporous gold with a silica shell for surface enhanced Raman scattering

Wei Li
, Chao Ma
, Ling Zhang^*
, Bin Chen
, Luyang Chen
, Heping Zeng

^*Corresponding author for this work

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

17 Scopus citations

Abstract

We report the tuning of localized surface plasmon resonance (LSPR) of nanoporous gold (NPG) by silica coating, which also affects the surface enhanced Raman scattering (SERS) of NPG. In this study, controllable silica shell is assembled on the NPG surface, and a fully silica thin layer causes more than 50 nm red-shift of LSPR band due to dielectric medium dependence. Additionally, ~1 nm silica coated NPG film shows excellent SERS enhancement, which is due to electromagnetic coupling between ligaments and local surface plasmon field enhancement within pores, and theoretical analysis indicates that silica coating further improves the coupling effect, which demonstrates the electromagnetic origin of the tuning of SERS effect.

Original language	English
Article number	251
Journal	Nanomaterials
Volume	9
Issue number	2
DOIs	https://doi.org/10.3390/nano9020251
State	Published - Feb 2019
Externally published	Yes

Keywords

Localized surface plasmon resonance (LSPR)
Nanoporous gold (NPG)
Surface-enhanced Raman scattering (SERS)

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10.3390/nano9020251

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title = "Tuning localized surface plasmon resonance of nanoporous gold with a silica shell for surface enhanced Raman scattering",

abstract = "We report the tuning of localized surface plasmon resonance (LSPR) of nanoporous gold (NPG) by silica coating, which also affects the surface enhanced Raman scattering (SERS) of NPG. In this study, controllable silica shell is assembled on the NPG surface, and a fully silica thin layer causes more than 50 nm red-shift of LSPR band due to dielectric medium dependence. Additionally, \textasciitilde{}1 nm silica coated NPG film shows excellent SERS enhancement, which is due to electromagnetic coupling between ligaments and local surface plasmon field enhancement within pores, and theoretical analysis indicates that silica coating further improves the coupling effect, which demonstrates the electromagnetic origin of the tuning of SERS effect.",

keywords = "Localized surface plasmon resonance (LSPR), Nanoporous gold (NPG), Surface-enhanced Raman scattering (SERS)",

author = "Wei Li and Chao Ma and Ling Zhang and Bin Chen and Luyang Chen and Heping Zeng",

note = "Publisher Copyright: {\textcopyright} 2019 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2019",

month = feb,

doi = "10.3390/nano9020251",

language = "英语",

volume = "9",

journal = "Nanomaterials",

issn = "2079-4991",

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TY - JOUR

T1 - Tuning localized surface plasmon resonance of nanoporous gold with a silica shell for surface enhanced Raman scattering

AU - Li, Wei

AU - Ma, Chao

AU - Zhang, Ling

AU - Chen, Bin

AU - Chen, Luyang

AU - Zeng, Heping

PY - 2019/2

Y1 - 2019/2

N2 - We report the tuning of localized surface plasmon resonance (LSPR) of nanoporous gold (NPG) by silica coating, which also affects the surface enhanced Raman scattering (SERS) of NPG. In this study, controllable silica shell is assembled on the NPG surface, and a fully silica thin layer causes more than 50 nm red-shift of LSPR band due to dielectric medium dependence. Additionally, ~1 nm silica coated NPG film shows excellent SERS enhancement, which is due to electromagnetic coupling between ligaments and local surface plasmon field enhancement within pores, and theoretical analysis indicates that silica coating further improves the coupling effect, which demonstrates the electromagnetic origin of the tuning of SERS effect.

AB - We report the tuning of localized surface plasmon resonance (LSPR) of nanoporous gold (NPG) by silica coating, which also affects the surface enhanced Raman scattering (SERS) of NPG. In this study, controllable silica shell is assembled on the NPG surface, and a fully silica thin layer causes more than 50 nm red-shift of LSPR band due to dielectric medium dependence. Additionally, ~1 nm silica coated NPG film shows excellent SERS enhancement, which is due to electromagnetic coupling between ligaments and local surface plasmon field enhancement within pores, and theoretical analysis indicates that silica coating further improves the coupling effect, which demonstrates the electromagnetic origin of the tuning of SERS effect.

KW - Localized surface plasmon resonance (LSPR)

KW - Nanoporous gold (NPG)

KW - Surface-enhanced Raman scattering (SERS)

UR - https://www.scopus.com/pages/publications/85062537161

U2 - 10.3390/nano9020251

DO - 10.3390/nano9020251

M3 - 文章

AN - SCOPUS:85062537161

SN - 2079-4991

VL - 9

JO - Nanomaterials

JF - Nanomaterials

IS - 2

M1 - 251

ER -

Tuning localized surface plasmon resonance of nanoporous gold with a silica shell for surface enhanced Raman scattering

Abstract

Keywords

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