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Lee, Chang Young
Carbon Nanomaterials Lab
Research Interests
  • Carbon nanomaterials, gas sensors, neuroanalytical chemistry, biomimetic nanosystems

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Exciton antennas and concentrators from core-shell and corrugated carbon nanotube filaments of homogeneous composition

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dc.contributor.author Han, Jae-Hee ko
dc.contributor.author Paulus, Geraldine L. C. ko
dc.contributor.author Maruyama, Ryuichiro ko
dc.contributor.author Heller, Daniel A. ko
dc.contributor.author Kim, Woo-Jae ko
dc.contributor.author Barone, Paul W. ko
dc.contributor.author Lee, Chang Young ko
dc.contributor.author Choi, Jong Hyun ko
dc.contributor.author Ham, Moon-Ho ko
dc.contributor.author Song, Changsik ko
dc.contributor.author Fantini, C. ko
dc.contributor.author Strano, Michael S. ko
dc.date.available 2015-07-23T02:11:19Z -
dc.date.created 2015-07-22 ko
dc.date.issued 2010-10 -
dc.identifier.citation NATURE MATERIALS, v.9, no.10, pp.833 - 839 ko
dc.identifier.issn 1476-1122 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/12308 -
dc.identifier.uri http://www.nature.com/nmat/journal/v9/n10/full/nmat2832.html ko
dc.description.abstract There has been renewed interest in solar concentrators and optical antennas for improvements in photovoltaic energy harvesting and new optoelectronic devices. In this work, we dielectrophoretically assemble single-walled carbon nanotubes (SWNTs) of homogeneous composition into aligned filaments that can exchange excitation energy, concentrating it to the centre of core-shell structures with radial gradients in the optical bandgap. We find an unusually sharp, reversible decay in photoemission that occurs as such filaments are cycled from ambient temperature to only 357 K, attributed to the strongly temperature-dependent second-order Auger process. Core-shell structures consisting of annular shells of mostly (6, 5) SWNTs (E-g = 1.21 eV) and cores with bandgaps smaller than those of the shell (E-g = 1.17 eV (7, 5)-0.98 eV (8, 7)) demonstrate the concentration concept: broadband absorption in the ultraviolet-near-infrared wavelength regime provides quasi-singular photoemission at the (8, 7) SWNTs. This approach demonstrates the potential of specifically designed collections of nanotubes to manipulate and concentrate excitons in unique ways ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher NATURE PUBLISHING GROUP ko
dc.subject ENERGY-TRANSFER ko
dc.subject OPTICAL ANTENNAS ko
dc.subject BUNDLES ko
dc.subject PHOTOLUMINESCENCE ko
dc.subject DIFFUSION ko
dc.subject DIAMETER ko
dc.subject CHARGE ko
dc.title Exciton antennas and concentrators from core-shell and corrugated carbon nanotube filaments of homogeneous composition ko
dc.title.alternative Exciton antennas and concentrators from core-shell and corrugated carbon nanotube filaments of homogeneous composition ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-79251517751 ko
dc.identifier.wosid 000282134700021 ko
dc.type.rims ART ko
dc.description.wostc 43 *
dc.description.scopustc 0 *
dc.date.tcdate 2015-12-28 *
dc.date.scptcdate 2015-11-04 *
dc.date.scptcdate 2015-11-04 *
dc.identifier.doi 10.1038/nmat2832 ko
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