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dc.contributor.author장재영-
dc.date.accessioned2018-03-13T07:55:29Z-
dc.date.available2018-03-13T07:55:29Z-
dc.date.issued2013-11-
dc.identifier.citationACS NANO, 권: 7, 호: 11, 페이지: 10296-10306en_US
dc.identifier.issn1936-0851-
dc.identifier.issn1936-086X-
dc.identifier.urihttps://pubs.acs.org/doi/abs/10.1021/nn404692s-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/46202-
dc.description.abstractNanostructured Bi1-xSbx alloys constitute a convenient system to study charge transport in a nanostructured narrow-gap semiconductor with promising thermoelectric properties. In this work, we developed the colloidal synthesis of monodisperse sub-10 nm Bi1-xSbx alloy nanocrystals (NCs) with controllable size and compositions. The surface chemistry of Bi1-xSbx NCs was tailored with inorganic ligands to improve the interparticle charge transport as well as to control the carrier concentration. Temperature-dependent (10-300 K) electrical measurements were performed on the Bi1-xSbx NC based pellets to investigate the effect of surface chemistry and grain size (similar to 10-40 nm) on their charge transport properties. The Hall effect measurements revealed that the temperature dependence of carrier mobility and concentration strongly depended on the grain size and the surface chemistry, which was different from the reported bulk behavior. At low temperatures, electron mobility in nanostructured Bi1-xSbx was directly proportional to the average grain size, while the concentration of free carriers was inversely proportional to the grain size. We propose a model explaining such behavior. Preliminary measurements of thermoelectric properties showed a ZT value comparable to those of bulk Bi1-xSbx alloys at 300 K, suggesting a potential of Bi1-xSbx NCs for low-temperature thermoelectric applications.en_US
dc.description.sponsorshipWe thank W. Liu and M. Boles for the discussion on the synthesis of Bi<INF>1-x</INF>Sb<INF>x</INF> NCs and D. Dolzhnikov for the synthesis of metal-free chalcogenide ligands. This work was supported by the II-VI Foundation and the NSF MRSEC Program under Award Number DMR-0213745. J.A.M. and W-L.O. acknowledge support from the AFOSR Young Investigator Program (FA95501110030) and the NSF CAREER Award (ENG1149374).en_US
dc.language.isoenen_US
dc.publisherAMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USAen_US
dc.subjectBi1-xSbx nanocrystalsen_US
dc.subjectelectrical conductivityen_US
dc.subjectHall effect measurementsen_US
dc.subjectgrain boundariesen_US
dc.subjectsurface chemistryen_US
dc.subjectthermoelectricsen_US
dc.titleBi1-xSbx Alloy Nanocrystals: Colloidal Synthesis, Charge Transport, and Thermoelectric Propertiesen_US
dc.typeArticleen_US
dc.relation.no11-
dc.relation.volume7-
dc.identifier.doi10.1021/nn404692s-
dc.relation.page10296-10306-
dc.relation.journalACS NANO-
dc.contributor.googleauthorZhang, Hao-
dc.contributor.googleauthorSon, Jae-Sung-
dc.contributor.googleauthorJang, Jae-young-
dc.contributor.googleauthorLee, Jong-Soo-
dc.contributor.googleauthorOng, Wee-Liat-
dc.contributor.googleauthorMalen, Jonathan A-
dc.contributor.googleauthorTalapin, Dmitri V-
dc.relation.code2013008626-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidjyjang15-
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COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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