| Title: | Seeing the Unseen: The Role of Liquid Crystals in Gas-Sensing Technologies |
| Author(s): | Esteves C; Ramou E; Porteira ARP; Barbosa AJM; Roque ACA; |
| Address: | "UCIBIO, Departamento de Quimica Faculdade de Ciencias e Tecnologia Universidade Nova de Lisboa Caparica 2829-516, Portugal" |
| ISSN/ISBN: | 2195-1071 (Print) 2195-1071 (Electronic) 2195-1071 (Linking) |
| Abstract: | "Fast, real-time detection of gases and volatile organic compounds (VOCs) is an emerging research field relevant to most aspects of modern society, from households to health facilities, industrial units, and military environments. Sensor features such as high sensitivity, selectivity, fast response, and low energy consumption are essential. Liquid crystal (LC)-based sensors fulfill these requirements due to their chemical diversity, inherent self-assembly potential, and reversible molecular order, resulting in tunable stimuliresponsive soft materials. Sensing platforms utilizing thermotropic uniaxial systems-nematic and smectic-that exploit not only interfacial phenomena, but also changes in the LC bulk, are demonstrated. Special focus is given to the different interaction mechanisms and tuned selectivity toward gas and VOC analytes. Furthermore, the different experimental methods used to transduce the presence of chemical analytes into macroscopic signals are discussed and detailed examples are provided. Future perspectives and trends in the field, in particular the opportunities for LC-based advanced materials in artificial olfaction, are also discussed" |
| Keywords: | gas sensing liquid crystals self-assembly soft functional materials volatile organic compounds; |
| Notes: | "PubMed-not-MEDLINEEsteves, Carina Ramou, Efthymia Porteira, Ana Raquel Pina Barbosa, Armenio Jorge Moura Roque, Ana Cecilia Afonso eng 639123/ERC_/European Research Council/International Germany 2020/07/03 Adv Opt Mater. 2020 Jun 4; 8(11):1902117. doi: 10.1002/adom.201902117. Epub 2020 Apr 8" |
