Incorporation of selective membranes improves detection of VOCs in electronic noses, suggesting better performance for environmental and healthcare applications.
Electronic noses (E‐noses) mimic olfactory organs and detect volatile organic compounds (VOCs) for applications in environmental monitoring, healthcare, and food safety. Organic field‐effect transistor (OFET) sensors offer an economical platform for large‐scale production, but their selectivity remains a challenge. In this study, we incorporate semi‐permeable polymer membranes into OFET vapor sensors to enhance analyte differentiation. Acylated poly(vinyl alcohol) (PVA) derivatives were synthesized, characterized, and applied as selective membranes. By monitoring drain current over time, we demonstrated that these membranes significantly improved sensor selectivity, particularly in distinguishing similar VOCs such as methanol and ethanol. This strategy enables cost‐effective fabrication of highly selective organic vapor sensors by modulating membrane properties.
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Mativenga et al. (2025) studied this question.
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