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dc.contributor.author김현우-
dc.date.accessioned2017-02-22T05:36:11Z-
dc.date.available2017-02-22T05:36:11Z-
dc.date.issued2015-06-
dc.identifier.citationCHEMISTRY OF MATERIALS, v. 27, NO 12, Page. 4222-4228en_US
dc.identifier.issn0897-4756-
dc.identifier.issn1520-5002-
dc.identifier.urihttp://pubs.acs.org/doi/abs/10.1021/cm504802j-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/25638-
dc.description.abstractBandgap engineering of atomically thin 2D crystals is critical for their applications in nanoelectronics, optoelectronics, and photonics. Here, we report a simple but rather unexpected approach for bandgap engineering of muscovite-type mica nanosheets (KAl3Si3O10(OH)(2)) via controlled molecular thickness. Through density functional calculations, we analyze electronic structures in 2D mica nanosheets and develop a general picture for tunable bandgap narrowing induced by controlled molecular thickness. From conducting atomic force microscopy, we observe an abnormal bandgap narrowing in 2D mica nanosheets, contrary to well-known quantum size effects. In mica nanosheets, decreasing the number of layers results in reduced bandgap energy from 7 to 2.5 eV, and the bilayer case exhibits a semiconducting nature with similar to 2.5 eV. Structural modeling by transmission electron microscopy and density functional calculations reveal that this bandgap narrowing can be defined as a consequence of lattice relaxations as well as surface doping effects. These bandgap engineered 2D mica nanosheets open up an exciting opportunity for new physical properties in 2D materials and may find diverse applications in 2D electronic/optoelectronic devices.en_US
dc.description.sponsorshipThis work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MEST; No. NRF-2013R1A2A2A01068438), Republic of Korea and World Premier International Research Center Initiative on Materials Nanoarchitronics (WPI-MANA), MEXT, Japan.en_US
dc.language.isoenen_US
dc.publisherAMER CHEMICAL SOCen_US
dc.subjectQUANTUM-CONFINEMENTen_US
dc.subjectFILMSen_US
dc.subjectGRAPHENEen_US
dc.subjectDICHALCOGENIDESen_US
dc.subjectLUMINESCENCEen_US
dc.subjectSTABILITYen_US
dc.titleTunable Bandgap Narrowing Induced by Controlled Molecular Thickness in 2D Mica Nanosheetsen_US
dc.typeArticleen_US
dc.relation.no12-
dc.relation.volume27-
dc.identifier.doi10.1021/cm504802j-
dc.relation.page4222-4228-
dc.relation.journalCHEMISTRY OF MATERIALS-
dc.contributor.googleauthorKim, Sang Sub-
dc.contributor.googleauthorVan Khai, Tran-
dc.contributor.googleauthorKulish, Vadym-
dc.contributor.googleauthorKim, Yoon-Hyun-
dc.contributor.googleauthorNa, Han Gil-
dc.contributor.googleauthorkatoch, Akash-
dc.contributor.googleauthorOsada, Minoru-
dc.contributor.googleauthorWu, Ping-
dc.contributor.googleauthorKim, Hyoun Woo-
dc.relation.code2015002115-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF MATERIALS SCIENCE AND ENGINEERING-
dc.identifier.pidhyounwoo-
dc.identifier.orcidA-4583-2016-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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