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dc.contributor.authorChappanda, Karumbaiah N.
dc.contributor.authorChaix, Arnaud
dc.contributor.authorSurya, Sandeep Goud
dc.contributor.authorMoosa, Basem
dc.contributor.authorKhashab, Niveen M.
dc.contributor.authorSalama, Khaled N.
dc.date.accessioned2019-07-11T13:03:31Z
dc.date.available2019-07-11T13:03:31Z
dc.date.issued2019-09
dc.identifier.doi10.1016/j.snb.2019.05.008
dc.identifier.urihttp://hdl.handle.net/10754/655986
dc.description.abstractIn this work, we present a highly sensitive and selective capacitive humidity sensor. Trianglamine hydrochloride is used as the sensing material, which is synthesized by a [3+3] cyclocondensation reaction between terpthaldehyde and 1R,2R-cyclohexanediamine followed by addition of hydrochloric acid and vapor diffusion of acetone. The crystalline trianglamine hydrochloride salts are dispersed in acetonitrile and then coated on interdigitated electrode substrates by drop casting. The sensor response is characterized for relative humidity (RH) ranging from 5% to 95%. The sensor has a nonlinear response, where the sensitivity increases with an increase in RH. The sensor demonstrates, on average, normalized sensitivities of 0.015 and 6.9 per percent of RH below and above 65% RH, respectively. In addition, the sensor is characterized for hysteresis, long-term stability, effect of temperature, and selectivity. The hysteresis of the sensor is a maximum of about 20% RH and is stable for over 25 days. Temperature analysis of the sensors shows that the sensitivity decreases with increase in temperature. The material is shown to be highly selective with respect to volatile organic compounds (VOCs) and toxic/corrosive gasses. Overall, trianglamine hydrochloride is a promising material for developing a highly sensitive and selective capacitive transduction-based humidity sensor.
dc.description.sponsorshipWe thank Ulrich Buttner of Microfluidic Lab, part of the Nanofabrication Core Lab, for providing his assistance in the project.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0925400519306963
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Sensors and Actuators B: Chemical. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Sensors and Actuators B: Chemical, [[Volume], [Issue], (2019-09)] DOI: 10.1016/j.snb.2019.05.008 . © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectTrianglamine hydrochloride
dc.subjectIDE Capacitors
dc.subjectHumidity sensor
dc.subjectSelectivity
dc.subjectMacrocycle
dc.titleTrianglamine hydrochloride crystals for a highly sensitive and selective humidity sensor
dc.typeArticle
dc.contributor.departmentSensors Lab, Advanced Membranes & Porous Materials Center (AMPMC), Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
dc.contributor.departmentPhysical Sciences and Engineering
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering
dc.contributor.departmentAdvanced Membranes & Porous Materials Center
dc.contributor.departmentChemical Science
dc.contributor.departmentElectrical Engineering
dc.identifier.journalSensors and Actuators B: Chemical
dc.rights.embargodate2021-09-01
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Electrical and Electronics Engineering, Birla Institute of Technology and Science, Hyderabad, 500078, India
kaust.personChappanda, Karumbaiah N.
kaust.personChaix, Arnaud
kaust.personSurya, Sandeep Goud
kaust.personMoosa, Basem
kaust.personKhashab, Niveen M.
kaust.personSalama, Khaled N.


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