Improved performances on surface-enhanced Raman scattering based on electrochemically roughened gold substrates modified with SiO2 nanoparticles

Yu Chuan Liu; Chung Chin Yu; Ting Chu Hsu

doi:10.1002/jrs.2319

Improved performances on surface-enhanced Raman scattering based on electrochemically roughened gold substrates modified with SiO₂ nanoparticles

Yu Chuan Liu, Chung Chin Yu, Ting Chu Hsu

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

10 Citations (Scopus)

Abstract

In this work, we use electrochemical oxidation-reduction cycles (ORC) methods to prepare surface-enhanced Raman scattering (SERS)-active gold substrates modified with SiO₂ nanoparticles to improve the corresponding SERS performances. Based on the modified substrates, the SERS of Rhodamine 6G (R6G) exhibits a higher intensity by 3-fold of magnitude, as compared with that of R6G adsorbed on a SERS-active Au substrate without the modification of SiO₂ nanoparticles. Moreover, the SERS enhancement capabilities of the modified and the unmodified Au substrates are seriously destroyed at temperatures higher than 250 and 200°C, respectively. These results indicate that the modification of SiO₂ nanoparticles can improve the thermal stability of SERS-active substrates. The aging in SERS intensity is also depressed on this modified Au substrate due to the contribution of SiO₂ nanoparticles to SERS effects.

Original language	English
Pages (from-to)	1682-1686
Number of pages	5
Journal	Journal of Raman Spectroscopy
Volume	40
Issue number	11
DOIs	https://doi.org/10.1002/jrs.2319
Publication status	Published - 2009
Externally published	Yes

Keywords

Electrochemical methods
Nanoparticles
SiO
Surface-enhanced Raman scattering

ASJC Scopus subject areas

Spectroscopy
General Materials Science

Access to Document

10.1002/jrs.2319

Cite this

@article{fcda83857bc04354bf123acc14b54540,

title = "Improved performances on surface-enhanced Raman scattering based on electrochemically roughened gold substrates modified with SiO2 nanoparticles",

abstract = "In this work, we use electrochemical oxidation-reduction cycles (ORC) methods to prepare surface-enhanced Raman scattering (SERS)-active gold substrates modified with SiO2 nanoparticles to improve the corresponding SERS performances. Based on the modified substrates, the SERS of Rhodamine 6G (R6G) exhibits a higher intensity by 3-fold of magnitude, as compared with that of R6G adsorbed on a SERS-active Au substrate without the modification of SiO2 nanoparticles. Moreover, the SERS enhancement capabilities of the modified and the unmodified Au substrates are seriously destroyed at temperatures higher than 250 and 200°C, respectively. These results indicate that the modification of SiO2 nanoparticles can improve the thermal stability of SERS-active substrates. The aging in SERS intensity is also depressed on this modified Au substrate due to the contribution of SiO2 nanoparticles to SERS effects.",

keywords = "Electrochemical methods, Nanoparticles, SiO, Surface-enhanced Raman scattering",

author = "Liu, {Yu Chuan} and Yu, {Chung Chin} and Hsu, {Ting Chu}",

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T1 - Improved performances on surface-enhanced Raman scattering based on electrochemically roughened gold substrates modified with SiO2 nanoparticles

AU - Liu, Yu Chuan

AU - Yu, Chung Chin

AU - Hsu, Ting Chu

PY - 2009

Y1 - 2009

N2 - In this work, we use electrochemical oxidation-reduction cycles (ORC) methods to prepare surface-enhanced Raman scattering (SERS)-active gold substrates modified with SiO2 nanoparticles to improve the corresponding SERS performances. Based on the modified substrates, the SERS of Rhodamine 6G (R6G) exhibits a higher intensity by 3-fold of magnitude, as compared with that of R6G adsorbed on a SERS-active Au substrate without the modification of SiO2 nanoparticles. Moreover, the SERS enhancement capabilities of the modified and the unmodified Au substrates are seriously destroyed at temperatures higher than 250 and 200°C, respectively. These results indicate that the modification of SiO2 nanoparticles can improve the thermal stability of SERS-active substrates. The aging in SERS intensity is also depressed on this modified Au substrate due to the contribution of SiO2 nanoparticles to SERS effects.

AB - In this work, we use electrochemical oxidation-reduction cycles (ORC) methods to prepare surface-enhanced Raman scattering (SERS)-active gold substrates modified with SiO2 nanoparticles to improve the corresponding SERS performances. Based on the modified substrates, the SERS of Rhodamine 6G (R6G) exhibits a higher intensity by 3-fold of magnitude, as compared with that of R6G adsorbed on a SERS-active Au substrate without the modification of SiO2 nanoparticles. Moreover, the SERS enhancement capabilities of the modified and the unmodified Au substrates are seriously destroyed at temperatures higher than 250 and 200°C, respectively. These results indicate that the modification of SiO2 nanoparticles can improve the thermal stability of SERS-active substrates. The aging in SERS intensity is also depressed on this modified Au substrate due to the contribution of SiO2 nanoparticles to SERS effects.

KW - Electrochemical methods

KW - Nanoparticles

KW - SiO

KW - Surface-enhanced Raman scattering

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