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Ultraviolet Photoluminescence of Carbon Nanospheres and its Surface Plasmon-Induced Enhancement
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2018 (English)In: Small, ISSN 1613-6810, E-ISSN 1613-6829, Vol. 14, no 16, article id 1704239Article in journal (Refereed) Published
Abstract [en]

Ultraviolet (UV) light can be used in versatile applications ranging from photoelectronic devices to biomedical imaging. In the development of new UV light sources, in this study, stable UV emission at ≈350 nm is unprecedentedly obtained from carbon nanospheres (CNSs). The origin of the UV fluorescence is comprehensively investigated via various characterization methods, including Raman and Fourier transform infrared analyses, with comparison to the visible emission of carbon nanodots. Based on the density functional calculations, the UV fluorescence is assigned to the carbon nanostructures bonded to bridging O atoms and dangling –OH groups. Moreover, a twofold enhancement in the UV emission is acquired for Au-carbon core-shell nanospheres (Au-CNSs). This remarkable modification of the UV emission is primarily ascribed to charge transfer between the CNSs and the Au surface.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2018. Vol. 14, no 16, article id 1704239
Keywords [en]
carbon nanostructures, charge transfer, photoluminescence, surface plasmons, ultraviolet
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-227607DOI: 10.1002/smll.201704239ISI: 000430398600020PubMedID: 29575595Scopus ID: 2-s2.0-85044292445OAI: oai:DiVA.org:kth-227607DiVA, id: diva2:1204944
Funder
Science for Life Laboratory - a national resource center for high-throughput molecular bioscience
Note

QC 20180509

Available from: 2018-05-09 Created: 2018-05-09 Last updated: 2018-05-09Bibliographically approved

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