Room-temperature sensor based on surface-enhanced Raman spectroscopy

Kuang Hsuan Yang, Fu Der Mai, Chung Chin Yu, Yu Chuan Liu

研究成果: 雜誌貢獻文章

5 引文 (Scopus)

摘要

As reported in the literature, several factors, such as scattering cross sections, polarisability and wavelength suitability, contribute to increased SERS enhancement. In general, the advantage of surface-enhanced Raman scattering (SERS)-active Ag nanoparticles (NPs) is their higher SERS enhancement over Au NPs because the molar extinction coefficient of the Ag NPs is the highest of its kind among metals. Nevertheless, the corresponding SERS-active hot spots on Au are of inherently greater stability than on Ag. In this work, innovative temperature sensors based on SERS-active Au and Ag substrates prepared by sonoelectrochemical deposition-dissolution cycles (SEDDCs) are first reported. The SERS intensity of the model probe molecules of Rhodamine 6G (R6G) adsorbed on a SERS-active Ag substrate is monotonically increased from 25 to 50 °C. Moreover, this temperature-dependent intensity is linear with a slope of ca. 430 cps per °C between 25 to 45 °C. In addition, the reversibility and reusability of the developed temperature sensors are evaluated after the R6G-adsorbed sensors are alternately exposed to the temperatures of 25 and 45 °C in a sealed chamber. After every five cycles, the SERS spectra of treated substrates were recorded and compared with those of the as-prepared substrates. Experimental results indicate that SERS enhancement capability is mostly reversible based on 90% intensity of the Raman signal being maintained for the SERS-active Au substrate after 25 cycles (only 15 cycles for the Ag substrate). This journal is

原文英語
頁(從 - 到)5164-5169
頁數6
期刊Analyst
139
發行號20
DOIs
出版狀態已發佈 - 十月 21 2014

指紋

Raman Spectrum Analysis
Raman spectroscopy
Temperature sensors
Raman scattering
scattering
sensor
Temperature
temperature
substrate
Substrates
Nanoparticles
Light extinction
Reusability
extinction coefficient
Dissolution
hot spot
Metals
Scattering
cross section
dissolution

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Electrochemistry
  • Biochemistry
  • Environmental Chemistry
  • Medicine(all)

引用此文

Room-temperature sensor based on surface-enhanced Raman spectroscopy. / Yang, Kuang Hsuan; Mai, Fu Der; Yu, Chung Chin; Liu, Yu Chuan.

於: Analyst, 卷 139, 編號 20, 21.10.2014, p. 5164-5169.

研究成果: 雜誌貢獻文章

Yang, Kuang Hsuan ; Mai, Fu Der ; Yu, Chung Chin ; Liu, Yu Chuan. / Room-temperature sensor based on surface-enhanced Raman spectroscopy. 於: Analyst. 2014 ; 卷 139, 編號 20. 頁 5164-5169.
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