Al2O3-modified surface-enhanced Raman scattering-active gold nanoparticles on substrates by using sonoelectrochemical pulse deposition

Chun Chao Chang, Chung Chin Yu, Yu Chuan Liu, Kuang Hsuan Yang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

As shown in the literature, many methods have been developed to improve signals, reproducibility and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. However, the fabrication can be laborious. In this work, we propose a simple pathway to prepare SERS-active substrates with Al2O3-modified Au nanoparticles (NPs) by sonoelectrochemical deposition-dissolution cycles (SEDDCs). Based on probe molecules of Rhodamine 6G (R6G), an enhancement factor of 4.4 × 10 8 and a detection limit of 2 × 10-14 M were observed on the proposed SERS-active substrates. The reproducibility and stabilities of the proposed SERS-active substrates are satisfactory. Also, the prepared Al 2O3-modified Au NPs-deposited substrate can markedly improve the thermal stability by raising the operation temperature over 50 C, as compared with unmodified Au NPs-deposited substrate. Meanwhile, aging of SERS effect observed on this proposed substrate is slight in an atmosphere of 50% RH and 20% (v/v) O2 at 30°C for 60 day.

Original languageEnglish
Pages (from-to)38-44
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume696
DOIs
Publication statusPublished - 2013

Fingerprint

Gold
Raman scattering
Nanoparticles
Substrates
Dissolution
Thermodynamic stability
Aging of materials
Fabrication
Molecules
Temperature

Keywords

  • Detection limit
  • Electrochemical methods
  • Modification
  • Surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

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title = "Al2O3-modified surface-enhanced Raman scattering-active gold nanoparticles on substrates by using sonoelectrochemical pulse deposition",
abstract = "As shown in the literature, many methods have been developed to improve signals, reproducibility and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. However, the fabrication can be laborious. In this work, we propose a simple pathway to prepare SERS-active substrates with Al2O3-modified Au nanoparticles (NPs) by sonoelectrochemical deposition-dissolution cycles (SEDDCs). Based on probe molecules of Rhodamine 6G (R6G), an enhancement factor of 4.4 × 10 8 and a detection limit of 2 × 10-14 M were observed on the proposed SERS-active substrates. The reproducibility and stabilities of the proposed SERS-active substrates are satisfactory. Also, the prepared Al 2O3-modified Au NPs-deposited substrate can markedly improve the thermal stability by raising the operation temperature over 50 C, as compared with unmodified Au NPs-deposited substrate. Meanwhile, aging of SERS effect observed on this proposed substrate is slight in an atmosphere of 50{\%} RH and 20{\%} (v/v) O2 at 30°C for 60 day.",
keywords = "Detection limit, Electrochemical methods, Modification, Surface-enhanced Raman scattering",
author = "Chang, {Chun Chao} and Yu, {Chung Chin} and Liu, {Yu Chuan} and Yang, {Kuang Hsuan}",
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T1 - Al2O3-modified surface-enhanced Raman scattering-active gold nanoparticles on substrates by using sonoelectrochemical pulse deposition

AU - Chang, Chun Chao

AU - Yu, Chung Chin

AU - Liu, Yu Chuan

AU - Yang, Kuang Hsuan

PY - 2013

Y1 - 2013

N2 - As shown in the literature, many methods have been developed to improve signals, reproducibility and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. However, the fabrication can be laborious. In this work, we propose a simple pathway to prepare SERS-active substrates with Al2O3-modified Au nanoparticles (NPs) by sonoelectrochemical deposition-dissolution cycles (SEDDCs). Based on probe molecules of Rhodamine 6G (R6G), an enhancement factor of 4.4 × 10 8 and a detection limit of 2 × 10-14 M were observed on the proposed SERS-active substrates. The reproducibility and stabilities of the proposed SERS-active substrates are satisfactory. Also, the prepared Al 2O3-modified Au NPs-deposited substrate can markedly improve the thermal stability by raising the operation temperature over 50 C, as compared with unmodified Au NPs-deposited substrate. Meanwhile, aging of SERS effect observed on this proposed substrate is slight in an atmosphere of 50% RH and 20% (v/v) O2 at 30°C for 60 day.

AB - As shown in the literature, many methods have been developed to improve signals, reproducibility and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. However, the fabrication can be laborious. In this work, we propose a simple pathway to prepare SERS-active substrates with Al2O3-modified Au nanoparticles (NPs) by sonoelectrochemical deposition-dissolution cycles (SEDDCs). Based on probe molecules of Rhodamine 6G (R6G), an enhancement factor of 4.4 × 10 8 and a detection limit of 2 × 10-14 M were observed on the proposed SERS-active substrates. The reproducibility and stabilities of the proposed SERS-active substrates are satisfactory. Also, the prepared Al 2O3-modified Au NPs-deposited substrate can markedly improve the thermal stability by raising the operation temperature over 50 C, as compared with unmodified Au NPs-deposited substrate. Meanwhile, aging of SERS effect observed on this proposed substrate is slight in an atmosphere of 50% RH and 20% (v/v) O2 at 30°C for 60 day.

KW - Detection limit

KW - Electrochemical methods

KW - Modification

KW - Surface-enhanced Raman scattering

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