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Gold nanoparticle hybridized rubrene nanofibers made by electrospinning: enhancement of optical and structural properties

Authors
Dhakal, Krishna P.Lee, HyunsooLee, JubokLee, Seok HoJoo, JinsooKim, Jeongyong
Issue Date
2014
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY C, v.2, no.10, pp.1830 - 1835
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MATERIALS CHEMISTRY C
Volume
2
Number
10
Start Page
1830
End Page
1835
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101107
DOI
10.1039/c3tc31519c
ISSN
2050-7526
Abstract
We prepared gold nanoparticle (Au NP) hybridized organic rubrene nanofibers (NFs) using a convenient electrospinning method. Au NPs of size 2-3 nm were incorporated throughout the light emitting rubrene NFs, which was confirmed by high resolution transmission electron microscopy. Au NP hybridized rubrene NFs showed a distinct nanoporous surface, compared to the smooth surface of rubrene NFs. Nanoscale confocal spectroscopy was performed on a single NF level and the results showed that the photoluminescence (PL) of the hybrid NFs made with 15 wt% Au NP mixture solution was 2.5 times higher than the PL of the rubrene NFs. And the optical extinction (scattering and absorption) of hybrid NFs increased monotonically with increasing Au NP concentrations. These enhanced optical properties of hybrid NFs were attributed to localized surface plasmon resonance of the embedded Au NPs. Structural modification from the monoclinic phase to the orthorhombic phase of the rubrene structure was obtained by XRD analysis indicating a better ordering along the rubrene ab plane of the hybrid NFs.
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