Whisky tasting using a bimetallic nanoplasmonic tongue

Macias, G., Sperling, J. R. , Peveler, W. J. , Burley, G. A., Neale, S. L. and Clark, A. W. (2019) Whisky tasting using a bimetallic nanoplasmonic tongue. Nanoscale, 11(32), pp. 15216-15223. (doi: 10.1039/C9NR04583J) (PMID:31384879)

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Metallic nanostructures are ideal candidates for optical tongue devices thanks to their chemical stability, the sensitivity of their plasmonic resonance to environmental changes, and their ease of chemical-functionalization. Here, we describe a reusable optical tongue comprised of multiplexed gold and aluminum nano-arrays; a bimetallic device which produces two distinct resonance peaks for each sensing region. Through specific modification of these plasmonic arrays with orthogonal surface chemistries, we demonstrate that a dual-resonance device allows us to halve sensor sizes and data-acquisition times when compared to single-resonance, monometallic devices. We applied our bimetallic tongue to differentiate off-the-shelf whiskies with > 99.7% accuracy by means of linear discriminant analysis (LDA). This advance in device miniaturization, functionalization, and multiplexed readout indicates nanoplasmonic tongues will have future applications in chemical mixture identification in applications where portability, reusability, and measurement speed are key.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Peveler, Dr William and Clark, Professor Alasdair and Burley, Dr Glenn and Sperling, Dr Justin and Macias Sotuela, Dr Gerard and Neale, Dr Steven
Authors: Macias, G., Sperling, J. R., Peveler, W. J., Burley, G. A., Neale, S. L., and Clark, A. W.
College/School:College of Science and Engineering > School of Chemistry
College of Science and Engineering > School of Engineering > Biomedical Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Nanoscale
Publisher:Royal Society of Chemistry
ISSN (Online):2040-3372
Published Online:03 July 2019
Copyright Holders:Copyright © 2019 The Royal Society of Chemistry
First Published:First published in Nanoscale 11(32): 15216-15223
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.5525/gla.researchdata.760

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
749331EPSRC-ISF 2016: UV illuminator for DNA-origami & Micro-spectrometer for monitoring the biological assembly of plasmonic metasurfaces in real-timeAlasdair ClarkEngineering and Physical Sciences Research Council (EPSRC)EP/P51133X/1ENG - BIOMEDICAL ENGINEERING
704621DNA-directed construction of three-dimensional photosynthetic assembliesAlasdair ClarkBiotechnology and Biological Sciences Research Council (BBSRC)BB/N016734/1ENG - BIOMEDICAL ENGINEERING