Raman gas sensing of modified Ag nanoparticle SERS

NoSoung Myoung; Hyung Keun Yoo; In-Wook Hwang

doi:10.1117/12.2038984

7 March 2014 Raman gas sensing of modified Ag nanoparticle SERS

NoSoung Myoung, Hyung Keun Yoo, In-Wook Hwang

Proceedings Volume 8969, Synthesis and Photonics of Nanoscale Materials XI; 89690S (2014) https://doi.org/10.1117/12.2038984
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Recent progress in modified Surface Enhanced Raman Scattering (SERS) using Ag nanoparticles makes them promising optical technique for direct gas sensing of interest. However, SERS has been shown to provide sub ppb level detection of the compounds in the vapor phase. The major problem with the sensitivity scaling-up was in the development of fabrication technology for stability and reproducibility of SERS substrates. We report an optimization of 1-propanethiol coated multiple Ag nanoparticle layers on SiO₂ substrate as well as new records of real-time, simultaneous vapor phase detection of toluene and 1-2 dichlorobenzene by the radiation of fiber optic coupled 785 nm diode laser and spectrograph. Multiple depositions of Ag NPs were loaded on SiO₂ and soaked in 1-propanethiol solution for 24 hours to modify the surface into hydrophobic due to the characteristics of vapor phase of our interests. Raman bands at 1003 cm^-1 and 1130 cm^-1 for toluene and 12DCB, respectively were compared to 1089 cm^-1 and each gas concentration in 1000 mL flask were calculated as a function of each vapor phase ratio. The saturation of toluene and 12DCB were limited only by 800 ppm and the detectable range was 0.6-800 ppm.

Citation Download Citation

NoSoung Myoung, Hyung Keun Yoo, and In-Wook Hwang "Raman gas sensing of modified Ag nanoparticle SERS", Proc. SPIE 8969, Synthesis and Photonics of Nanoscale Materials XI, 89690S (7 March 2014); https://doi.org/10.1117/12.2038984

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available