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Binary Self-Assembly of Conjugated Block Copolymers and Quantum Dots at the Air-Liquid Interface into Ordered Functional Nanoarrays

Title
Binary Self-Assembly of Conjugated Block Copolymers and Quantum Dots at the Air-Liquid Interface into Ordered Functional Nanoarrays
Authors
Oh S.Yang M.Kang S.Chung S.-H.Bouffard J.Hong S.Park S.-J.
Ewha Authors
Jean Bouffard박소정
SCOPUS Author ID
Jean Bouffardscopus; 박소정scopus
Issue Date
2019
Journal Title
ACS Applied Materials and Interfaces
ISSN
1944-8244JCR Link
Citation
ACS Applied Materials and Interfaces vol. 11, no. 31, pp. 28538 - 28545
Keywords
block copolymerconjugated polymerinterfacenanoparticlephotocurrentself-assembly
Publisher
American Chemical Society
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Controlling the nanoscale morphology of conducting polymer/nanoparticle hybrid films is a highly desired but challenging task. Here, we report that such functional hybrid films with unprecedented structural order can be formed through the self-assembly of conjugated block copolymers and CdSe quantum dots at the air-water interface. The one-step assembly of quantum dots and block copolymers composed of polythiophene and polyethylene glycol (P3HT-b-PEG) at the fluidic interface generated a highly ordered assembly structure of P3HT nanowires and one-dimensional quantum dot arrays. Structure analyses revealed a unique self-assembly behavior and size dependency, which are distinct from the conventional self-assembly of coil-type polymers on solid substrates. Interestingly, hydrophobic quantum dots reside at the interface between P3HT and PEG domains without disrupting the P3HT packing structure, which is advantageous for the optoelectronic properties. Furthermore, large particles bridge the P3HT nanowires at both ends, while small particles decorate each P3HT/PEG interfaces, thus forming tight p-n junctions for a broad size range of nanoparticles. The nanoparticle-incorporated hybrid films showed more than an order of magnitude higher photocurrent and light sensitivity compared to polymer-only films, consistent with the assembly structure with close contact between the organic and inorganic semiconductors. © 2019 American Chemical Society.
DOI
10.1021/acsami.9b08892
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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