<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Esteves, C</style></author><author><style face="normal" font="default" size="100%">Ramou, E.</style></author><author><style face="normal" font="default" size="100%">Porteira, A.R.P.</style></author><author><style face="normal" font="default" size="100%">Barbosa, AJM</style></author><author><style face="normal" font="default" size="100%">Roque, A. C. A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Seeing the Unseen: The Role of Liquid Crystals in Gas‐Sensing Technologies</style></title><secondary-title><style face="normal" font="default" size="100%">Advanced Optical Materials</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2020</style></year></dates><urls><related-urls><url><style face="normal" font="default" size="100%">https://sites.fct.unl.pt/sites/default/files/biomolecular_eng/files/2020_esteves_review_lcs.pdf</style></url></related-urls></urls><volume><style face="normal" font="default" size="100%">1902117</style></volume><pages><style face="normal" font="default" size="100%">1-29</style></pages><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Fast, real-time detection of gases and volatile organic compounds (VOCs) is&lt;br /&gt;
an emerging research field relevant to most aspects of modern society, from&lt;br /&gt;
households to health facilities, industrial units, and military environments.&lt;br /&gt;
Sensor features such as high sensitivity, selectivity, fast response, and low&lt;br /&gt;
energy consumption are essential. Liquid crystal (LC)-based sensors fulfill&lt;br /&gt;
these requirements due to their chemical diversity, inherent self-assembly&lt;br /&gt;
potential, and reversible molecular order, resulting in tunable stimuliresponsive soft materials. Sensing platforms utilizing thermotropic uniaxial&lt;br /&gt;
systems—nematic and smectic—that exploit not only interfacial phenomena,&lt;br /&gt;
but also changes in the LC bulk, are demonstrated. Special focus is given to&lt;br /&gt;
the different interaction mechanisms and tuned selectivity toward gas and&lt;br /&gt;
VOC analytes. Furthermore, the different experimental methods used to&lt;br /&gt;
transduce the presence of chemical analytes into macroscopic signals are discussed and detailed examples are provided. Future perspectives and trends&lt;br /&gt;
in the field, in particular the opportunities for LC-based advanced materials in&lt;br /&gt;
artificial olfaction, are also discussed.&lt;/p&gt;
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