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Conference Paper: Hydrogel-integrated plasmonic nanostructures on optical fiber facet for remote and real-time pH sensing
Title | Hydrogel-integrated plasmonic nanostructures on optical fiber facet for remote and real-time pH sensing |
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Authors | |
Keywords | Fiber-optics sensor Hydrogel Nanoimprint pH sensing Refractive index Surface plasmon resonance |
Issue Date | 2017 |
Publisher | Society of Photo-Optical Instrumentation Engineers (SPIE). |
Citation | SPIE Optics + Photonics 2017, San Diego, CA, 6-10 August 2017. In Proceedings of SPIE, 2017, v. 10353, article no. 103530V How to Cite? |
Abstract | In this work, we use ultraviolet nanoimprint lithography (UV-NIL) to transfer metallic nanostructures from a polymer mold to the facet of the optical fiber with 200 μm core diameter. Once a polymer mold carrying nanopillar array is fabricated by thermal embossing, a thin layer of gold is deposited on it by thermal evaporation. Then the metallic nanostructure is transferred onto fiber facet by the cross-linked UV-cured resist. The transferred metallic nanostructures feature closely spaced double layers of disks and holes. Strong coupling between the metal disk and hole generates resonantly enhanced local electrical field under incident excitation light, as revealed by peaks and dips in the reflection spectra. A layer of hydrogel is coated and cross-linked on fiber facet as a pH-sensing element. Hydrogel shrinks in acid and swells in basic solutions by containing different amount of water and thus has a different refractive index, which can be detected from the resonant reflection peaks/dips of plasmonic fiber probe. Our hydrogel fiber probe shows obvious spectrum response to solutions with pH values ranging from 1 to 8. Under cycling test, the sensor remains stable for three cycles when switching between acid and basic solutions. |
Description | Conference 10353 - Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications 2017 |
Persistent Identifier | http://hdl.handle.net/10722/246319 |
ISSN | 2023 SCImago Journal Rankings: 0.152 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, S | - |
dc.contributor.author | Li, W | - |
dc.date.accessioned | 2017-09-18T02:26:24Z | - |
dc.date.available | 2017-09-18T02:26:24Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | SPIE Optics + Photonics 2017, San Diego, CA, 6-10 August 2017. In Proceedings of SPIE, 2017, v. 10353, article no. 103530V | - |
dc.identifier.issn | 0277-786X | - |
dc.identifier.uri | http://hdl.handle.net/10722/246319 | - |
dc.description | Conference 10353 - Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications 2017 | - |
dc.description.abstract | In this work, we use ultraviolet nanoimprint lithography (UV-NIL) to transfer metallic nanostructures from a polymer mold to the facet of the optical fiber with 200 μm core diameter. Once a polymer mold carrying nanopillar array is fabricated by thermal embossing, a thin layer of gold is deposited on it by thermal evaporation. Then the metallic nanostructure is transferred onto fiber facet by the cross-linked UV-cured resist. The transferred metallic nanostructures feature closely spaced double layers of disks and holes. Strong coupling between the metal disk and hole generates resonantly enhanced local electrical field under incident excitation light, as revealed by peaks and dips in the reflection spectra. A layer of hydrogel is coated and cross-linked on fiber facet as a pH-sensing element. Hydrogel shrinks in acid and swells in basic solutions by containing different amount of water and thus has a different refractive index, which can be detected from the resonant reflection peaks/dips of plasmonic fiber probe. Our hydrogel fiber probe shows obvious spectrum response to solutions with pH values ranging from 1 to 8. Under cycling test, the sensor remains stable for three cycles when switching between acid and basic solutions. | - |
dc.language | eng | - |
dc.publisher | Society of Photo-Optical Instrumentation Engineers (SPIE). | - |
dc.relation.ispartof | Proceedings of SPIE | - |
dc.rights | Copyright 2017 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited. This article is available online at https://doi.org/10.1117/12.2272550 | - |
dc.subject | Fiber-optics sensor | - |
dc.subject | Hydrogel | - |
dc.subject | Nanoimprint | - |
dc.subject | pH sensing | - |
dc.subject | Refractive index | - |
dc.subject | Surface plasmon resonance | - |
dc.title | Hydrogel-integrated plasmonic nanostructures on optical fiber facet for remote and real-time pH sensing | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Li, W: liwd@hku.hk | - |
dc.identifier.authority | Li, W=rp01581 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1117/12.2272550 | - |
dc.identifier.scopus | eid_2-s2.0-85033376107 | - |
dc.identifier.hkuros | 276664 | - |
dc.identifier.volume | 10353 | - |
dc.identifier.spage | article no. 103530V | - |
dc.identifier.epage | article no. 103530V | - |
dc.identifier.isi | WOS:000417336000009 | - |
dc.publisher.place | San Diego, CA | - |
dc.identifier.issnl | 0277-786X | - |