Kwon, Sooncheol Pak, Yusin Kim, Bongseong Park, Byoungwook Kim, Jehan Kim, Geunjin Jo, Yong-Ryun Limbu, Saurav Stewart, Katherine Kim, Hyeonghun Kim, Bong-Joong Jang, Soo-Young Kang, Hongkyu Min, Jung-Wook Kim, Ji-Seon Jung, Gun Young Lee, Kwanghee 2024-01-19T16:33:39Z 2024-01-19T16:33:39Z 2021-09-02 2020-09 2050-7488 https://pubs.kist.re.kr/handle/201004/118133 Printable organic sensors fabricated from solution-processed pi-conjugated polymers (pi-CPs) are promising candidates to detect volatile organic compounds (VOCs) due to the intriguing physical, chemical and electronic properties of pi-CPs. These devices, often termed organic chemiresistors, require good sensing capabilities to transduce stimuli from specific VOCs at low concentrations into analytical electric signals. However, discriminating such VOCs using organic chemiresistors has proven very challenging. Herein, we report that the molecular-level electrochemical doping of pi-CPs with solid-state ionic liquids (SILs) significantly improves their electrical conductivity (similar to 10(-1)S cm(-1)) and selective VOC interactions, which can be manipulated through different pi-CPs:SIL blend ratios. These characteristics enable the fine discrimination of VOCs at concentrations in the parts-per-billion (ppb) range under low power consumption (<0.1 mu W) and room temperature conditions. Our result provides a new opportunity for developing highly sensitive and selective VOC monitoring platform technologies that are printable on large-area, wearable, flexible and transparent substrates. English ROYAL SOC CHEMISTRY Molecular-level electrochemical doping for fine discrimination of volatile organic compounds in organic chemiresistors Article 10.1039/d0ta05530a 1 JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.33, pp.16884 - 16891 JOURNAL OF MATERIALS CHEMISTRY A 8 33 16884 16891 N scie scopus 000562931300006 2-s2.0-85090158603 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article LUNG-CANCER SENSOR TRANSISTORS ACETONE BREATH CAPACITANCE DIAGNOSIS FILMS