{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T21:11:03Z","timestamp":1776805863178,"version":"3.51.2"},"reference-count":43,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2017,10,23]],"date-time":"2017-10-23T00:00:00Z","timestamp":1508716800000},"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>In this paper, capacitive-type humidity sensors were prepared by sequentially drop-coating the aqueous suspensions of zinc oxide (ZnO) nanopowders and polyvinyl pyrrolidone\u2013reduced graphene oxide (PVP-RGO) nanocomposites onto interdigitated electrodes. Significant improvements in both sensitivity and linearity were achieved for the ZnO\/PVP-RGO sensors compared with the PVP-RGO\/ZnO, PVP-RGO, and ZnO counterparts. Moreover, the produced ZnO\/PVP-RGO sensors exhibited rather small hysteresis, fast response-recovery time, and long-term stability. Based on morphological and structural analyses, it can be inferred that the excellent humidity sensing properties of the ZnO\/PVP-RGO sensors may be attributed to the high surface-to-volume ratio of the multilayer structure and the supporting roles of the PVP-RGO nanocomposites. The results in this work hence provide adequate guidelines for designing high-performance humidity sensors that make use of the multilayer structure of semiconductor oxide materials and PVP-RGO nanocomposites.<\/jats:p>","DOI":"10.3390\/s17102415","type":"journal-article","created":{"date-parts":[[2017,10,23]],"date-time":"2017-10-23T12:20:24Z","timestamp":1508761224000},"page":"2415","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":71,"title":["Stable and Fast-Response Capacitive Humidity Sensors Based on a ZnO Nanopowder\/PVP-RGO Multilayer"],"prefix":"10.3390","volume":"17","author":[{"given":"Hui","family":"Yang","sequence":"first","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qiangqiang","family":"Ye","sequence":"additional","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ruixue","family":"Zeng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junkai","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lei","family":"Yue","sequence":"additional","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ming","family":"Xu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhi-Jun","family":"Qiu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"},{"name":"School of Information Science and Technology, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dongping","family":"Wu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,10,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1016\/j.snb.2014.03.043","article-title":"The role of water vapour in ZnO nanostructures for humidity sensing at room temperature","volume":"198","author":"Ochoteco","year":"2014","journal-title":"Sens. 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