{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,14]],"date-time":"2026-05-14T07:03:03Z","timestamp":1778742183137,"version":"3.51.4"},"reference-count":32,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2020,4,27]],"date-time":"2020-04-27T00:00:00Z","timestamp":1587945600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The three-dimensional volumetric application of conductive poly (3,4-ethylenedioxythiophene)\/poly (4-styrenesulfonate) (PEDOT:PSS) to multiwalled carbon nanotubes (MWCNTs) has not been widely reported. In this study, the applicability of the 3D PEDOT:PSS-MWCNT composite for a gas sensor was investigated with different PEDOT:PSS concentrations. The gas-sensing performance of the 3D PEDOT:PSS-MWCNT composites was investigated using ethanol and carbon monoxide (CO) gas. Overall, in comparison with the pristine MWCNTs, as the PEDOT:PSS concentration increased, the 3D PEDOT:PSS-MWCNT composites exhibited increased conductivity and enhanced gas sensing performances (fast response and recovery times) to both ethanol and CO gases. Importantly, although the PEDOT:PSS coating layer reduced the number of sites for the adsorption and desorption of gas molecules, the charge-carrier transport between the gas molecules and MWCNTs was significantly enhanced. Thus, PEDOT:PSS can be chemically grafted to MWCNTs to enhance the connectivity and conductivity of a 3D network, leading to possible applications in gas sensors.<\/jats:p>","DOI":"10.3390\/s20092470","type":"journal-article","created":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T10:30:58Z","timestamp":1588069858000},"page":"2470","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Tunable Chemical Grafting of Three-Dimensional Poly (3, 4-ethylenedioxythiophene)\/Poly (4-styrenesulfonate)-Multiwalled Carbon Nanotubes Composite with Faster Charge-Carrier Transport for Enhanced Gas Sensing Performance"],"prefix":"10.3390","volume":"20","author":[{"given":"Hyojae","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Bio-Nano System Engineering, Jeonbuk National University, Jeonju 54896, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yeongseok","family":"Jang","sequence":"additional","affiliation":[{"name":"Department of Mechanical Design Engineering, Jeonbuk National University, Jeonju 54896, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gyeong Won","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Biomaterials Science, Life and Industry Convergence Institute, Pusan National University, Miryang 50463, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seung Yun","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Biomaterials Science, Life and Industry Convergence Institute, Pusan National University, Miryang 50463, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinmu","family":"Jung","sequence":"additional","affiliation":[{"name":"Department of Nano-bio Mechanical System Engineering, Jeonbuk National University, Jeonju 54896, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonghyun","family":"Oh","sequence":"additional","affiliation":[{"name":"Department of Nano-bio Mechanical System Engineering, Jeonbuk National University, Jeonju 54896, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,4,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2487","DOI":"10.1002\/adma.200803536","article-title":"Room-temperature gas sensing based on electron transfer between discrete tin oxide nanocrystals and multiwalled carbon nanotubes","volume":"21","author":"Lu","year":"2009","journal-title":"Adv. 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