@conference {Moreira2021, title = {Fish gelatin-based films for gas sensing}, booktitle = {BIODEVICES 2021 - 14th International Conference on Biomedical Electronics and Devices; Part of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2021}, year = {2021}, note = {

n/a

}, pages = {32{\textendash}39}, publisher = {SciTePress}, organization = {SciTePress}, abstract = {

Electronic noses (e-noses) mimic the complex biological olfactory system, usually including an array of gas sensors to act as the olfactory receptors and a trained computer with signal-processing and pattern recognition tools as the brain. In this work, a new stimuli-responsive material is shown, consisting of self-assembled droplets of liquid crystal and ionic liquid stabilised within a fish gelatin matrix. These materials change their opto/electrical properties upon contact with volatile organic compounds (VOCs). By using an in-house developed e-nose, these new gas-sensing films yield characteristic optical signals for VOCs from different chemical classes. A support vector machine classifier was implemented based on 12 features of the signals. The results show that the films are excellent identifying hydrocarbon VOCs (toluene, heptane and hexane) (95\% accuracy) but lower performance was found to other VOCs, resulting in an overall 60.4\% accuracy. Even though they are not reusable, these sustainable gas-sensing films are stable throughout time and reproducible, opening several opportunities for future optoelectronic devices and artificial olfaction systems.

}, keywords = {Electronic nose, Fish gelatin, Gas-sensing, Ionic liquid, Liquid crystal, Volatile organic compounds}, isbn = {9789897584909}, doi = {10.5220/0010206200320039}, attachments = {https://sites.fct.unl.pt/sites/default/files/biomolecular_eng/files/102062.pdf}, author = {Moreira, In{\^e}s Pimentel and Sato, Laura and Cl{\'a}udia Alves and Susana Palma and Roque, Ana Cec{\'\i}lia} }