Influence of Hydrothermal Synthesis Conditions and Device Configuration on the Photoresponse of UV Sensors Based on ZnO Nanorods

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSavu, Raluca
dc.creatorParra, Rodrigo
dc.creatorJancar, Bostjan
dc.creatorZaghete, Maria Aparecida
dc.creatorJoanni, Ednan
dc.date2014-05-20T14:17:46Z
dc.date2016-10-25T17:40:09Z
dc.date2014-05-20T14:17:46Z
dc.date2016-10-25T17:40:09Z
dc.date2011-09-01
dc.date.accessioned2017-04-05T22:26:01Z
dc.date.available2017-04-05T22:26:01Z
dc.identifierIEEE Sensors Journal. Piscataway: IEEE-Inst Electrical Electronics Engineers Inc, v. 11, n. 9, p. 1820-1825, 2011.
dc.identifier1530-437X
dc.identifierhttp://hdl.handle.net/11449/25333
dc.identifierhttp://acervodigital.unesp.br/handle/11449/25333
dc.identifier10.1109/JSEN.2011.2105261
dc.identifierWOS:000293710700011
dc.identifierhttp://dx.doi.org/10.1109/JSEN.2011.2105261
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/870233
dc.descriptionZinc oxide nanorods in the form of powder or nanostructured films were synthesized by the hydrothermal method using aqueous solutions. Once the synthesis time was completed, the reaction vessel was naturally cooled or submitted to a quenching process. X-ray diffraction, Scanning Electron Microscopy and Transmission Electron Microscopy techniques were employed to characterize the crystallinity, morphology, and dimensions of the nanorods, as well as their growth direction. Suspensions of powder material were spin-coated over oxidized silicon substrates in order to obtain nanostructured layers. Photodetectors based on in-situ grown and spin-coated films were prepared in order to evaluate the influences of cooling rate and device configuration on the UV sensing characteristics. Spin-coated layers showed an excellent performance (current change by more than four orders of magnitude), better than nanorods grown directly on the substrate during the hydrothermal process. For both configurations, the sensitive layers built from quenched samples exhibited enhanced UV photoresponses when compared to the naturally cooled ones.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relationIEEE Sensors Journal
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCooling rate
dc.subjecthydrothermal synthesis
dc.subjectnanorods
dc.subjectUV photodetectors
dc.subjectzinc oxide
dc.titleInfluence of Hydrothermal Synthesis Conditions and Device Configuration on the Photoresponse of UV Sensors Based on ZnO Nanorods
dc.typeOtro


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