Graphene Oxide Nanosheet Wrapped White-Emissive Conjugated Polymer Nanoparticles

Title
Graphene Oxide Nanosheet Wrapped White-Emissive Conjugated Polymer Nanoparticles
Authors
유동윤뉴옌 카 투이수진이은지전성란황선영임호선김종규주병권김희숙임정아
Keywords
Conjugated polymer; nanoparticle; graphene oxide; fluorescence; core shell structure; polyfluorene; green emission
Issue Date
2014-05
Publisher
ACS Nano
Citation
VOL 8, NO 5, 4248-4256
Abstract
We have demonstrated the preparation of white-emissive conjugated polymer nanoparticles wrapped with graphene oxide (GO) nanosheets. Highly stable, GO-wrapped, poly(9,9-di-n-octylfluorenyl-2,7-diyl) nanoparticles (GO-PFO NPs) with diameters in the range 30 150 nm were successfully obtained by utilizing the GO nanosheets as an interface stabilizer in an emulsification process. The synthesized GO-PFO NPs exhibited unique white-emitting photoluminescence with a characteristic green-emissive broad band above 500 nm, which was distinct from the photoluminescent behavior of PFO NPs without GO. This green emission was deduced to originate from the presence of the GO nanosheet shell surrounding the PFO NPs, rather than from luminescence of GO itself or formation of keto defects in the PFO chain. PL decay analysis showed that the GO-wrapped PFO NPs had a longer luminescence lifetime in comparison to PFO NPs without GO, and highly efficient energy transfer to lower energy state induced by the GO occurred.
URI
http://pubs.kist.re.kr/handle/201004/47679
ISSN
19360851
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KIST Publication > Article
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