{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T03:35:40Z","timestamp":1772336140925,"version":"3.50.1"},"reference-count":22,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2011,6,24]],"date-time":"2011-06-24T00:00:00Z","timestamp":1308873600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A single polyaniline nanofiber field effect transistor (FET) gas sensor fabricated by means of electrospinning was investigated to understand its sensing mechanisms and optimize its performance. We studied the morphology, field effect characteristics and gas sensitivity of conductive nanofibers. The fibers showed Schottky and Ohmic contacts based on different electrode materials. Higher applied gate voltage contributes to an increase in gas sensitivity. The nanofiber transistor showed a 7% reversible resistance change to 1 ppm NH3 with 10 V gate voltage. The FET characteristics of the sensor when exposed to different gas concentrations indicate that adsorption of NH3 molecules reduces the carrier mobility in the polyaniline nanofiber. As such, nanofiber-based sensors could be promising for environmental and industrial applications.<\/jats:p>","DOI":"10.3390\/s110706509","type":"journal-article","created":{"date-parts":[[2011,6,25]],"date-time":"2011-06-25T16:17:11Z","timestamp":1309018631000},"page":"6509-6516","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":73,"title":["A Single Polyaniline Nanofiber Field Effect Transistor and Its Gas Sensing Mechanisms"],"prefix":"10.3390","volume":"11","author":[{"given":"Dajing","family":"Chen","sequence":"first","affiliation":[{"name":"College of Biomedical Engineering, Zhejiang University, Hangzhou, 310027, China"}]},{"given":"Sheng","family":"Lei","sequence":"additional","affiliation":[{"name":"College of Biomedical Engineering, Zhejiang University, Hangzhou, 310027, China"}]},{"given":"Yuquan","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Biomedical Engineering, Zhejiang University, Hangzhou, 310027, China"}]}],"member":"1968","published-online":{"date-parts":[[2011,6,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"267","DOI":"10.3390\/s7030267","article-title":"Gas sensors based on conducting polymers","volume":"7","author":"Bai","year":"2007","journal-title":"Sensors"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2349","DOI":"10.1002\/smll.200900445","article-title":"One dimensional composite nanomaterials: Synthesis by electrospinning and their applications","volume":"5","author":"Lu","year":"2009","journal-title":"Small"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1077","DOI":"10.1021\/nl050587l","article-title":"Polyaniline nanofiber\/gold nanoparticle nonvolatile memory","volume":"5","author":"Tseng","year":"2005","journal-title":"Nano Lett"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2278","DOI":"10.1063\/1.112717","article-title":"Electromagnetic radiation shielding by intrinsically conducting polymers","volume":"65","author":"Joo","year":"1994","journal-title":"Appl. Phys. Lett"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"624","DOI":"10.1002\/smll.200400155","article-title":"Polyaniline nanofiber composites with metal salts: Chemical sensors for hydrogen sulfide","volume":"1","author":"Virji","year":"2005","journal-title":"Small"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"529","DOI":"10.1016\/j.snb.2009.01.028","article-title":"Hydrogen gas sensor based on highly ordered polyaniline nanofibers","volume":"137","author":"Arsat","year":"2009","journal-title":"Sens. Actuat. B"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"436","DOI":"10.1149\/1.1837428","article-title":"Use of polyaniline and its derivatives in corrosion protection of copper and silver","volume":"144","author":"Brusic","year":"1997","journal-title":"J. Electrochem. Soc"},{"key":"ref_8","first-page":"367","article-title":"The intrinsic nanofibrillar morphology of polyaniline","volume":"4","author":"Huang","year":"2005","journal-title":"Chem. Commun"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"954","DOI":"10.1021\/nl103322b","article-title":"Carbon nanotube\/polyaniline composite nanofibers: Facile synthesis and chemosensors","volume":"11","author":"Liao","year":"2011","journal-title":"Nano Lett"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/j.snb.2008.01.025","article-title":"Gate modulation in carbon nanotube field effect transistors-based NH3 gas sensors","volume":"132","author":"Peng","year":"2008","journal-title":"Sens. Actuat. B"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1038\/nmat768","article-title":"Conducting polymers in electronic chemical sensors","volume":"2","author":"Janata","year":"2003","journal-title":"Nat. Mater"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1109\/JSEN.2006.883769","article-title":"Polyaniline nanofiber based surface acoustic wave gas sensors\u2014effect of nanofiber diameter on H2 response","volume":"7","author":"Sadek","year":"2007","journal-title":"IEEE Sens. J"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0003-2670(02)01229-1","article-title":"Polyaniline as a new sensitive layer for gas sensors","volume":"475","year":"2003","journal-title":"Anal. Chim. Acta"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"491","DOI":"10.1021\/nl035122e","article-title":"Polyaniline nanofiber gas sensors: Examination of response mechanisms","volume":"4","author":"Virji","year":"2004","journal-title":"Nano Lett"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1153","DOI":"10.1002\/elan.200603527","article-title":"Electrochemically functionalized single walled carbon nanotube gas sensor","volume":"18","author":"Zhang","year":"2006","journal-title":"Electroanalysis"},{"key":"ref_16","unstructured":"Wang, R, Li, H, Pan, M, and Chen, D (2009). A Carbon Nanotube Gas Sensor Fabricated by Dielectrophoresis and Its Application for NH3 Detection, IEEE Computer Society."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"123111:1","DOI":"10.1063\/1.2975834","article-title":"Continuous near-field electrospinning for large area deposition of orderly nanofiber patterns","volume":"93","author":"Chang","year":"2008","journal-title":"Appl Phys Lett"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"839","DOI":"10.1021\/nl0602701","article-title":"Near-field electrospinning","volume":"6","author":"Sun","year":"2006","journal-title":"Nano Lett"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"223110:1","DOI":"10.1063\/1.3132064","article-title":"Ultralow-power hydrogen sensing with single palladium nanowires","volume":"94","author":"Offermans","year":"2009","journal-title":"Appl Phys Lett"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1016\/S0379-6779(97)80879-X","article-title":"Field-effect transistor with polyaniline thin film as semiconductor","volume":"88","author":"Kuo","year":"1997","journal-title":"Synthet. Metal"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"4348","DOI":"10.1021\/nl902611f","article-title":"In As nanowire transistors as gas sensor and the response mechanism","volume":"9","author":"Du","year":"2009","journal-title":"Nano Lett"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"671","DOI":"10.1021\/nl049826f","article-title":"Polymeric nanowire chemical sensor","volume":"4","author":"Liu","year":"2004","journal-title":"Nano Lett"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/11\/7\/6509\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:56:33Z","timestamp":1760219793000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/11\/7\/6509"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011,6,24]]},"references-count":22,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2011,7]]}},"alternative-id":["s110706509"],"URL":"https:\/\/doi.org\/10.3390\/s110706509","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2011,6,24]]}}}