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

Title
Ordered assemblies of Fe3O4 and a donor-acceptor-type pi-conjugated polymer in nanoparticles for enhanced photoacoustic and magnetic effects
Authors
Thi-Thuy Duong PhamSeo, Young HunLee, DabinNoh, JuranChae, JeongwanKang, EunahPark, JaeHongShin, Tae JooKim, SehoonPark, Juhyun
Ewha Authors
박재홍
Issue Date
2019
Journal Title
POLYMER
ISSN
0032-3861JCR Link

1873-2291JCR Link
Citation
POLYMER vol. 161, pp. 205 - 213
Keywords
Conjugated polymersIron oxidesHybrid nanoparticlesPhotoacoustic imagingMagnetic resonance imaging
Publisher
ELSEVIER SCI LTD
Indexed
SCIE; SCOPUS WOS
Document Type
Article
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, T-2, 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.
DOI
10.1016/j.polymer.2018.12.020
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자연과학대학 > 화학·나노과학전공 > Journal papers
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