Plasmonic nanoparticle-functionalized exposed-core fiber—an optofluidic refractive index sensing platform
| Autor: | Stephen C. Warren-Smith, Markus A. Schmidt, Erik P. Schartner, Wolfgang Fritzsche, Heike Ebendorff-Heidepriem, Brenda Doherty, Matthias Thiele |
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| Přispěvatelé: | Doherty, Brenda, Thiele, Matthias, Warren-Smith, Stephen, Schartner, Erik, Ebendorff-Heidepriem, Heike, Fritzsche, Wolfgang, Schmidt, Markus A |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanoparticle Nanotechnology nanoparticle diameter 02 engineering and technology 01 natural sciences plasmonic nanoparticle 010309 optics Optics nanoparticle density 0103 physical sciences Fiber Surface plasmon resonance refractive index sensing Plasmon microstructured fibers business.industry refractive index sensor Microstructured optical fiber refractive index sensitivity 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics micro fluidic system Core (optical fiber) Optoelectronics 0210 nano-technology business Refractive index Photonic-crystal fiber |
| Zdroj: | Optics Letters. 42:4395 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.42.004395 |
| Popis: | Here, we show that immobilizing ensembles of gold nanospheres within tailored areas on the open side of an exposed-core microstructured fiber yields a monolithic, highly sensitive plasmon-based refractive index sensor. The nanoparticle densities (average nanoparticle diameter: 45 nm) on the small-core fiber (core diameter: 2.5 mu m) are controlled electrostatically, yielding densities of 4 nanoparticles/mu m(2). Refractive index sensitivities of 200 nm/RIU for aqueous analytes at high fringe contrast levels (-20 dB) have been observed. Our concept presents an easy-to-use, efficient, and multiplex-compatible sensing platform for rapid small-volume detection with the capacity for integration into a bioanalytic, optofluidic, or microfluidic system. Refereed/Peer-reviewed |
| Databáze: | OpenAIRE |
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