Ordered assemblies of Fe3O4 and a donor-acceptor-type conjugated polymer in nanoparticles for enhanced photoacoustic and magnetic effects

Title
Ordered assemblies of Fe3O4 and a donor-acceptor-type conjugated polymer in nanoparticles for enhanced photoacoustic and magnetic effects
Authors
김세훈Thi-Thuy Duong Pham서영훈이다빈노주란채정완강은아박재홍신태주박주현
Issue Date
2019-01
Publisher
Polymer
Citation
VOL 161-213
Abstract
We report that the ordered structure in the assemblies of iron oxide nanoparticles in conjugated polymer nanoparticles is the key to achieve better properties to realize multimodal theranostic agents for magnetic resonance and photoacoustic imaging. Hybrid nanoparticles of a conjugated polymer (PCPDTBT), a phospholipid (D8PE) with a primary amine polar head, and iron oxide (Fe3O4) nanoparticles were prepared by a phase-separated film shattering process by varying the iron oxide concentration while maintaining a fixed mixing ratio of PCPDTBT and D8PE. Notably, the hybrid nanoparticles assembled at a molar mixing ratio of 1:1:0.8 (PCPDTBT/D8PE/Fe3O4) exhibited the shortest transversal relaxation time, T2, and a photoacoustic signal 22 times higher than that obtained at the 1:1:0 mixing ratio. Structural analysis by X-ray diffraction together with the measurements of energy transfer by transient absorption spectroscopy confirmed that the structural ordering of these hybrid nanoparticles was responsible for their enhanced photoacoustic and magnetic properties.
URI
http://pubs.kist.re.kr/handle/201004/70774
ISSN
0032-3861
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KIST Publication > Article
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