Improved stabilities on surface-enhanced Raman scattering-active Ag/Al 2O3 films on substrates

Fu Der Mai, Kuang Hsuan Yang, Yu Chuan Liu, Ting Chu Hsu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

As is shown in the literature, surface-enhanced Raman scattering (SERS)-active Ag films obtained by the salting-out of Ag colloids from solutions with some salts, are popularly used to examine the structure of analytes. SERS-active Ag nanoparticles (NPs) demonstrate more significant SERS effects than Au NPs, however, problems regarding the stabilities of SERS-active Ag NPs remain to be overcome. In this work, Ag/Al2O3 colloids were prepared in 0.1 M HNO3 solutions containing Al2O 3 NPs with higher heat capacity by sonoelectrochemical methods. SERS-active Ag/Al2O3 films deposited on glass slides were prepared by the addition of a saturated NaCl solution in the prepared Ag/Al 2O3 colloids-containing solution. In an acceptable sacrifice of Raman intensity by ca. 30% magnitude, the prepared Ag/Al 2O3 films markedly improved thermal stability by raising the operation temperature over 100 °C, compared to Ag films. Meanwhile, aging of SERS enhancement capability in an atmosphere of relative humidity (RH) of 50% and 20% (v/v) O2 at 30 °C is significantly depressed using Ag/Al2O3 films.

Original languageEnglish
Pages (from-to)5906-5912
Number of pages7
JournalAnalyst
Volume137
Issue number24
DOIs
Publication statusPublished - Dec 21 2012

Fingerprint

Raman Spectrum Analysis
Raman scattering
scattering
substrate
Nanoparticles
Colloids
Substrates
colloid
Hot Temperature
heat capacity
Humidity
Atmosphere
Specific heat
Glass
relative humidity
Atmospheric humidity
Thermodynamic stability
Salts
Aging of materials
glass

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Electrochemistry
  • Biochemistry
  • Environmental Chemistry

Cite this

Improved stabilities on surface-enhanced Raman scattering-active Ag/Al 2O3 films on substrates. / Mai, Fu Der; Yang, Kuang Hsuan; Liu, Yu Chuan; Hsu, Ting Chu.

In: Analyst, Vol. 137, No. 24, 21.12.2012, p. 5906-5912.

Research output: Contribution to journalArticle

Mai, Fu Der ; Yang, Kuang Hsuan ; Liu, Yu Chuan ; Hsu, Ting Chu. / Improved stabilities on surface-enhanced Raman scattering-active Ag/Al 2O3 films on substrates. In: Analyst. 2012 ; Vol. 137, No. 24. pp. 5906-5912.
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