Nanotag-enabled photonic crystal fiber as quantitative surface-enhanced Raman scattering optofluidic platform

0449001 - ÚFE 2016 RIV US eng J - Journal Article
Pinkhasova, P. - Chen, H. - Kaňka, Jiří - Mergo, P. - Du, H.
Nanotag-enabled photonic crystal fiber as quantitative surface-enhanced Raman scattering optofluidic platform.
Applied Physics Letters. Roč. 106, č. 7 (2015), 0711061-0711064. ISSN 0003-6951. E-ISSN 1077-3118
R&D Projects: GA MŠMT(CZ) LH11038
Institutional support: RVO:67985882
Keywords : Photonic crystal fibers * Raman scattering * Crystal whiskers
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 3.142, year: 2015

Core-shell nanotags that are active in surface-enhanced Raman scattering (SERS) and entrapped with thiocyanate (SCN) label molecules were immobilized in the air channels of suspended-core photonic crystal fiber (PCF) to impart quantitative capacity to SERS-based PCF optofluidic sensing platform. The Raman intensity of Rhodamine 6G increases with concentration, whereas the intensity of SCN remains constant when measured using this platform. The signal from the SCN label can be used as an internal reference to establish calibration for quantitative measurements of analytes of unknown concentrations. The long optical path-length PCF optofluidic platform integrated with SERS-active core-shell nanotags holds significant promise for sensitive quantitative chem/bio measurements with the added benefit of small sampling volume. The dependence of SERS intensity on the nanotag coverage density and PCF length was interpreted based on numerical-analytical simulations
Permanent Link: http://hdl.handle.net/11104/0250592