{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,26]],"date-time":"2025-11-26T21:57:09Z","timestamp":1764194229674,"version":"build-2065373602"},"reference-count":23,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2017,3,11]],"date-time":"2017-03-11T00:00:00Z","timestamp":1489190400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000780","name":"European Commission","doi-asserted-by":"publisher","award":["664786"],"award-info":[{"award-number":["664786"]}],"id":[{"id":"10.13039\/501100000780","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We report on hydrazine-sensing organic electrochemical transistors (OECTs) with a design consisting of concentric annular electrodes. The design engineering of these OECTs was motivated by the great potential of using OECT sensing arrays in fields such as bioelectronics. In this work, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-based OECTs have been studied as aqueous sensors that are specifically sensitive to the lethal hydrazine molecule. These amperometric sensors have many relevant features for the development of hydrazine sensors, such as a sensitivity down to 10\u22125 M of hydrazine in water, an order of magnitude higher selectivity for hydrazine than for nine other water-soluble common analytes, the capability to entirely recover its base signal after water flushing, and a very low operation voltage. The specificity for hydrazine to be sensed by our OECTs is caused by its catalytic oxidation at the gate electrode, and enables an increase in the output current modulation of the devices. This has permitted the device-geometry study of the whole series of 80 micrometric OECT devices with sub-20-nm PEDOT:PSS layers, channel lengths down to 1 \u00b5m, and a specific device geometry of coplanar and concentric electrodes. The numerous geometries unravel new aspects of the OECT mechanisms governing the electrochemical sensing behaviours of the device\u2014more particularly the effect of the contacts which are inherent at the micro-scale. By lowering the device cross-talk, micrometric gate-integrated radial OECTs shall contribute to the diminishing of the readout invasiveness and therefore further promote the development of OECT biosensors.<\/jats:p>","DOI":"10.3390\/s17030570","type":"journal-article","created":{"date-parts":[[2017,3,13]],"date-time":"2017-03-13T10:26:18Z","timestamp":1489400778000},"page":"570","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Concentric-Electrode Organic Electrochemical Transistors: Case Study for Selective Hydrazine Sensing"],"prefix":"10.3390","volume":"17","author":[{"given":"S\u00e9bastien","family":"Pecqueur","sequence":"first","affiliation":[{"name":"Institut d\u2019Electronique, Micro-\u00e9lectronique et Nanotechnologie, CNRS, CS 60069, Avenue Poincar\u00e9, 59652  Villeneuve d\u2019Ascq CEDEX, France"}]},{"given":"St\u00e9phane","family":"Lenfant","sequence":"additional","affiliation":[{"name":"Institut d\u2019Electronique, Micro-\u00e9lectronique et Nanotechnologie, CNRS, CS 60069, Avenue Poincar\u00e9, 59652  Villeneuve d\u2019Ascq CEDEX, France"}]},{"given":"David","family":"Gu\u00e9rin","sequence":"additional","affiliation":[{"name":"Institut d\u2019Electronique, Micro-\u00e9lectronique et Nanotechnologie, CNRS, CS 60069, Avenue Poincar\u00e9, 59652  Villeneuve d\u2019Ascq CEDEX, France"}]},{"given":"Fabien","family":"Alibart","sequence":"additional","affiliation":[{"name":"Institut d\u2019Electronique, Micro-\u00e9lectronique et Nanotechnologie, CNRS, CS 60069, Avenue Poincar\u00e9, 59652  Villeneuve d\u2019Ascq CEDEX, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3362-1669","authenticated-orcid":false,"given":"Dominique","family":"Vuillaume","sequence":"additional","affiliation":[{"name":"Institut d\u2019Electronique, Micro-\u00e9lectronique et Nanotechnologie, CNRS, CS 60069, Avenue Poincar\u00e9, 59652  Villeneuve d\u2019Ascq CEDEX, France"}]}],"member":"1968","published-online":{"date-parts":[[2017,3,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/S1369-7021(06)71444-4","article-title":"Organic and polymer transistors for electronics","volume":"9","author":"Dodabalapur","year":"2006","journal-title":"Mater. Today"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2473","DOI":"10.3390\/polym6092473","article-title":"Towards high performance organic photovoltaic cells: A review of recent development in organic photovoltaics","volume":"6","author":"Yu","year":"2014","journal-title":"Polymers"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2053","DOI":"10.1002\/adma.200500727","article-title":"Multilayer polymer light-emitting diodes: White-light emission with high efficiency","volume":"17","author":"Gong","year":"2005","journal-title":"Adv. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"817","DOI":"10.1038\/nphoton.2013.242","article-title":"Elastomeric polymer light-emitting devices and displays","volume":"7","author":"Liang","year":"2013","journal-title":"Nat. Photon."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2565","DOI":"10.1002\/adma.200904163","article-title":"A water-gated organic field-effect transistor","volume":"22","author":"Kergoat","year":"2010","journal-title":"Adv. Mater."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1324","DOI":"10.1038\/srep01324","article-title":"Interface trap states in organic photodiodes","volume":"3","author":"Arca","year":"2013","journal-title":"Sci. Rep."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1575","DOI":"10.1038\/ncomms2573","article-title":"In vivo recordings of brain activity using organic transistors","volume":"4","author":"Khodagholy","year":"2013","journal-title":"Nat. Commun."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"679","DOI":"10.1021\/cm4022003","article-title":"The rise of organic bioelectronics","volume":"26","author":"Rivnay","year":"2014","journal-title":"Chem. Mater."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"4405","DOI":"10.1002\/adma.201500218","article-title":"Localized neuron stimulation with organic electrochemical transistors on delaminating depth probes","volume":"27","author":"Williamson","year":"2015","journal-title":"Adv. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.sna.2013.08.037","article-title":"Analysis of a concentric coplanar capacitor for epidermal hydration sensing","volume":"203","author":"Cheng","year":"2013","journal-title":"Sens. Actuators A Phys."},{"key":"ref_11","unstructured":"European Commision DG Employment, Social Affairs & Inclusion Recommendation from the Scientific Committee on Occupational Exposure Limits for Hydrazine, SCOEL\/SUM\/164. Available online: http:\/\/ec.europa.eu\/social\/BlobServlet?docId=6516&langId=en."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2135","DOI":"10.1002\/adma.201204322","article-title":"Easy-to-fabricate conducting polymer microelectrode array","volume":"25","author":"Sessolo","year":"2013","journal-title":"Adv. Mater."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"19594","DOI":"10.1038\/srep19594","article-title":"Resistive switching memory phenomena in PEDOT PSS: Coexistence of switchable diode effect and write once read many memory","volume":"6","author":"Nguyen","year":"2016","journal-title":"Sci. Rep."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"3538","DOI":"10.1002\/adfm.200601239","article-title":"Steady-state and transient behaviour of organic electrochemical transistors","volume":"17","author":"Bernards","year":"2007","journal-title":"Adv. Funct. Mater."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1012","DOI":"10.1002\/adma.200902329","article-title":"Influence of device geometry on sensor characteristics of planar organic electrochemical transistors","volume":"22","author":"Cicoira","year":"2010","journal-title":"Adv. Mater."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1002\/polb.22129","article-title":"Optimization of organic electrochemical transistors for sensor applications","volume":"49","author":"Yaghmazadeh","year":"2011","journal-title":"J. Polym. Sci. Part B"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"123304","DOI":"10.1063\/1.3491216","article-title":"Effect of the gate electrode on the response of organic electrochemical transistors","volume":"97","author":"Tarabella","year":"2010","journal-title":"Appl. Phys. Lett."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"e1400251","DOI":"10.1126\/sciadv.1400251","article-title":"High-performance transistors for bioelectronics through tuning of channel thickness","volume":"1","author":"Rivnay","year":"2015","journal-title":"Sci. Adv."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"14071","DOI":"10.1021\/acsami.6b02698","article-title":"Efficiency of the Switching Process in Organic Electrochemical Transistors","volume":"8","author":"Fian","year":"2016","journal-title":"ACS. Appl. Mater. Interfaces"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"5279","DOI":"10.1039\/c0cp02261f","article-title":"The mechanism of hydrazine electro-oxidation revealed by platinum microelectrodes: Role of residual oxides","volume":"13","author":"Aldous","year":"2011","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"014911","DOI":"10.1063\/1.4905154","article-title":"Solvent-induced changes in PEDOT:PSS films for organic electrochemical transistors","volume":"3","author":"Zhang","year":"2015","journal-title":"APL Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"817","DOI":"10.1021\/ac950662k","article-title":"Chemical sensors for hydrazine and monomethylhydrazine vapor","volume":"98","author":"Ellis","year":"1996","journal-title":"Anal. Chem."},{"key":"ref_23","unstructured":"Sze, S.M. (1969). Physics of Semiconductor Devices, Wiley-Interscience."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/3\/570\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:30:15Z","timestamp":1760207415000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/3\/570"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,3,11]]},"references-count":23,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2017,3]]}},"alternative-id":["s17030570"],"URL":"https:\/\/doi.org\/10.3390\/s17030570","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2017,3,11]]}}}