Nanoplasmonic discrimination of organic solvents using a bimetallic optical tongue

Sperling, Justin R. and Macias, Gerard and Burley, Glenn A. and Neale, Steven L. and Clark, Alasdair W.; Danielli, Amos and Miller, Benjamin L. and Weiss, Sharon M., eds. (2019) Nanoplasmonic discrimination of organic solvents using a bimetallic optical tongue. In: Frontiers in Biological Detection. Procceedings of SPIE . SPIE, USA. ISBN 9781510624320 (https://doi.org/10.1117/12.2507275)

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Abstract

Optical sensor arrays serve as excellent tools for the recognition and discrimination of a variety of liquid and gas mixtures. They achieve this via pattern-based recognition from signals across multiple sensing regions, where each region is modified to produce a different interaction, such as partial-selectivity, with desired analytes. As their use progresses towards rapid, highly personalized diagnosis and component identification devices, reduction in complexity and data-acquisition time is key. One way to achieve this is through reducing the number of elements in the array without compromising the differential capabilities of the device. Here, we present a device with elements consisting of plasmonic sensors of two superimposed plasmonic nanoarrays; one fabricated using gold and the other aluminum. Each material produces a distinct plasmonic response while also allowing us to selectively functionalize each pattern with a different â€sensing chemistry.' This allows for the development of different partially-selective elements, via modification with functional thiols and silanes, respectively. Since optical sensing arrays of this type require multiple sensing regions, each producing a different optical response, our bimetallic method results in twice as much data from one measurement, providing the same amount of data necessary to allow for successful differentiation with fewer elements in the sensing array. We demonstrate that by altering the surface chemistry of the nanostructures we can tune their partial selectivity to organic solvents. We believe this technology could be useful in areas that rely on assays for simultaneous determination of multiple analytes, such as the medical, food and drug, and security industries.

  • Item type:Book Section
    ID code:69926
    Dates:
    Date
    Event
    7 March 2019
    Published
    2 October 2018
    Accepted
    Notes:Copyright 2019 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.
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:24 Sep 2019 11:41
    Last modified:11 Nov 2024 15:19
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/69926
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