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dc.contributor.authorAhmad, Rafiq
dc.contributor.authorTripathy, Nirmalya
dc.contributor.authorAhn, Min-Sang
dc.contributor.authorYoo, Jin-Young
dc.contributor.authorHahn, Yoon-Bong
dc.date.accessioned2018-05-07T07:22:20Z
dc.date.available2018-05-07T07:22:20Z
dc.date.issued2018-03-16
dc.identifier.citationAhmad R, Tripathy N, Ahn M-S, Yoo J-Y, Hahn Y-B (2018) Preparation of a Highly Conductive Seed Layer for Calcium Sensor Fabrication with Enhanced Sensing Performance. ACS Sensors 3: 772–778. Available: http://dx.doi.org/10.1021/acssensors.7b00900.
dc.identifier.issn2379-3694
dc.identifier.issn2379-3694
dc.identifier.doi10.1021/acssensors.7b00900
dc.identifier.urihttp://hdl.handle.net/10754/627755
dc.description.abstractThe seed layer plays a crucial role in achieving high electrical conductivity and ensuring higher performance of devices. In this study, we report fabrication of a solution-gated field-effect transistor (FET) sensor based on zinc oxide nanorods (ZnO NRs) modified iron oxide nanoparticles (α-FeO NPs) grown on a highly conductive sandwich-like seed layer (ZnO seed layer/Ag nanowires/ZnO seed layer). The sandwich-like seed layer and ZnO NRs modification with α-FeO NPs provide excellent conductivity and prevent possible ZnO NRs surface damage from low pH enzyme immobilization, respectively. The highly conductive solution-gated FET sensor employed the calmodulin (CaM) immobilization on the surface of α-FeO-ZnO NRs for selective detection of calcium ions (Ca). The solution-gated FET sensor exhibited a substantial change in conductance upon introduction of different concentrations of Ca and showed high sensitivity (416.8 μA cm mM) and wide linear range (0.01-3.0 mM). In addition, the total Ca concentration in water and serum samples was also measured. Compared to the analytically obtained data, our sensor was found to measure Ca in the water and serum samples accurately, suggesting a potential alternative for Ca determination in water and serum samples, specifically used for drinking/irrigation and clinical analysis.
dc.description.sponsorshipThis work was supported by the National Leading Research Laboratory program through the National Research Foundation (NRF) (NRF-2016R1A2B2016665) of Korea funded by the Ministry of Science, ICT & Future Planning. Authors also thank KBSI, Jeonju branch for SEM analysis and Mr. Jong-Gyun Kang, Center for University Research Facility (CURF) for taking good quality TEM images.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acssensors.7b00900
dc.rightsArchived with thanks to ACS Sensors
dc.subjectcalcium sensor
dc.subjectfield-effect-transistor
dc.subjecthigh sensitivity
dc.subjecthighly conductive
dc.subjectiron oxide nanoparticles
dc.subjectreal sample analysis
dc.subjectseed layer
dc.subjectzinc oxide
dc.titlePreparation of a Highly Conductive Seed Layer for Calcium Sensor Fabrication with Enhanced Sensing Performance
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentSensors Lab
dc.identifier.journalACS Sensors
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Semiconductor and Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekjedaero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, , South Korea
dc.contributor.institutionUniversity of Washington, Seattle, WA, 98195, , United States
kaust.personAhmad, Rafiq
refterms.dateFOA2019-03-16T00:00:00Z
dc.date.published-online2018-03-16
dc.date.published-print2018-04-27


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