{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T19:47:27Z","timestamp":1774381647883,"version":"3.50.1"},"reference-count":45,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,5,17]],"date-time":"2021-05-17T00:00:00Z","timestamp":1621209600000},"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>A detailed examination of the principle of operation behind the functioning of the full-self-powered humidity sensor is presented. The sensor has been realized as a structure consisting of an interdigitated capacitor with aluminum thin-film digits. In this work, the details of its fabrication and activation are described in detail. The performed XRD, FTIR, SEM, AFM, and EIS analyses, as well as noise measurements, revealed that the dominant process of electricity generation is the electrochemical reaction between the sensor\u2019s aluminum electrodes and the water from humid air in the presence of oxygen, which was the main goal of this work. The response of the sensor to human breath is also presented as a demonstration of its possible practical application.<\/jats:p>","DOI":"10.3390\/s21103486","type":"journal-article","created":{"date-parts":[[2021,5,17]],"date-time":"2021-05-17T12:19:57Z","timestamp":1621253997000},"page":"3486","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Full-Self-Powered Humidity Sensor Based on Electrochemical Aluminum\u2013Water Reaction"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1428-9346","authenticated-orcid":false,"given":"Marko V.","family":"Bo\u0161kovi\u0107","sequence":"first","affiliation":[{"name":"Department of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy, University of Belgrade, Njego\u0161eva 12, 11000 Belgrade, Serbia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0203-4012","authenticated-orcid":false,"given":"Biljana","family":"\u0160ljuki\u0107","sequence":"additional","affiliation":[{"name":"Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 12-16, 11158 Belgrade, Serbia"},{"name":"CeFEMA, Instituto Superior T\u00e9chnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7609-8599","authenticated-orcid":false,"given":"Dana","family":"Vasiljevi\u0107 Radovi\u0107","sequence":"additional","affiliation":[{"name":"Department of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy, University of Belgrade, Njego\u0161eva 12, 11000 Belgrade, Serbia"}]},{"given":"Katarina","family":"Radulovi\u0107","sequence":"additional","affiliation":[{"name":"Department of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy, University of Belgrade, Njego\u0161eva 12, 11000 Belgrade, Serbia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8170-746X","authenticated-orcid":false,"given":"Milena","family":"Ra\u0161lji\u0107 Rafajilovi\u0107","sequence":"additional","affiliation":[{"name":"Department of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy, University of Belgrade, Njego\u0161eva 12, 11000 Belgrade, Serbia"}]},{"given":"Milo\u0161","family":"Frantlovi\u0107","sequence":"additional","affiliation":[{"name":"Department of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy, University of Belgrade, Njego\u0161eva 12, 11000 Belgrade, Serbia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1267-1827","authenticated-orcid":false,"given":"Milija","family":"Sarajli\u0107","sequence":"additional","affiliation":[{"name":"Department of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy, University of Belgrade, Njego\u0161eva 12, 11000 Belgrade, Serbia"}]}],"member":"1968","published-online":{"date-parts":[[2021,5,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Wernecke, R., and Wernecke, J. 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