RF sputtered amorphous chalcogenide thin films for surface enhanced infrared absorption spectroscopy
ČlánekOtevřený přístuppeer-reviewedpostprintDatum publikování
2013
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Vydavatel
Optical Society of America
Abstrakt
The primary objective of this study is the development of transparent thin film materials in the IR enabling strong infrared absorption of organic compounds in the vicinity of metal nanoparticles by the surface plasmon effect. For developing these optical micro-sensors, heterostructures combining gold nanoparticles and chalcogenide planar
waveguides are fabricated and adequately characterized. Single As2S3 and Ge25Sb10Se65 amorphous chalcogenide thin films are prepared by radiofrequency
magnetron sputtering. For the fabrication of gold nanoparticles on a chalcogenide planar waveguide, direct current sputtering is employed. Fabricated single layers or hetero-structures are characterized using various techniques to investigate the influence of deposition parameters. The nanoparticles of gold are functionalized by a self-assembled monolayer of 4-nitrothiophenol. Finally, the surface enhanced infrared absorption spectra of 4-nitrothiophenol self-assembled on fabricated Au/Ge-Sb-Se thin films hetero-structures are measured and analyzed. This optical component
presents a ~24 enhancement factor for the detection of NO2 symmetric stretching vibration band of 4-nitrothiophenol at 1336 cm−1.
Rozsah stran
p. 2112-2131
ISSN
2159-3930
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Zdrojový dokument
Optical Materials Express. 2013, vol. 3, issue 12
Vydavatelská verze
http://www.opticsinfobase.org/ome/abstract.cfm?uri=ome-3-12-2112
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Klíčová slova
sputtering, waveguides, optical properties, amorphous chalcogenides, thin films, surface enhanced infrared absorption spectroscopy, naprašování, vlnovody, optické vlastnosti, amorfní chalkogenidy, tenké vrstvy, povrchem zesílená infračervená absorpční spektroskopie