Imperial College London
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Dr Ali K. Yetisen

Faculty of Engineering, Department of Chemical Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 5562a.yetisen Website

 
 
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Location

 

507ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jiang:2021:10.1021/acssensors.0c02109,
author = {Jiang, N and Davies, S and Jiao, Y and Blyth, J and Butt, H and Montelongo, Y and Yetisen, AK},
doi = {10.1021/acssensors.0c02109},
journal = {ACS Sensors},
pages = {915--924},
title = {Doubly photopolymerized holographic sensors},
url = {http://dx.doi.org/10.1021/acssensors.0c02109},
volume = {6},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Holographic sensors are two-dimensional (2D) photonic crystals that diffract narrow-band light in the visible spectrum to quantify analytes in aqueous solutions. Here, a holographic fabrication setup was developed to produce holographic sensors through a doubly polymerization system of a poly-2-hydroxyethyl methacrylate hydrogel film using a pulsed Nd:YAG laser (λ = 355 nm, 5 ns, 100 mJ). Wavelength shifts of holographic Bragg peak in response to alcohol species (0–100 vol %) were characterized. Diffraction spectra showed that the holographic sensors could be used for short-chain alcohols at concentrations up to 60 vol %. The reversibility of the sensor was demonstrated, exhibiting a response time of 7.5 min for signal saturation. After 30 cycles, the Bragg peak and color remained the same in both 20 and 60 vol %. The fabrication parameters were simulated in MATLAB using a 2D finite-difference time-domain algorithm to model the interference pattern and energy flux profile of laser beam recording in the hydrogel medium. This work demonstrates a particle-free holographic sensor that offers continuous, reversible, and rapid colorimetric readouts for the real-time quantification of alcohols.
AU  - Jiang,N
AU  - Davies,S
AU  - Jiao,Y
AU  - Blyth,J
AU  - Butt,H
AU  - Montelongo,Y
AU  - Yetisen,AK
DO  - 10.1021/acssensors.0c02109
EP  - 924
PY  - 2021///
SN  - 2379-3694
SP  - 915
TI  - Doubly photopolymerized holographic sensors
T2  - ACS Sensors
UR  - http://dx.doi.org/10.1021/acssensors.0c02109
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000635484500036&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.acs.org/doi/10.1021/acssensors.0c02109
VL  - 6
ER  -
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