Block copolymer-nanorod co-assembly in thin Films:effects of rod-rod interaction and confinement

Javier, Diaz, Pinna, Marco, Zvelindovsky, Andrei, Pagonaborraga, Ignacio and Shenhar, Roy (2020) Block copolymer-nanorod co-assembly in thin Films:effects of rod-rod interaction and confinement. Macromolecules, 53 (8). pp. 3234-3249. ISSN 0024-9297

Full content URL: https://doi.org/10.1021/acs.macromol.9b02475

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Block copolymer-nanorod co-assembly in thin Films:effects of rod-rod interaction and confinement
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Item Type:Article
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Abstract

Simulations and experiments of nanorods (NRs) show that co-assembly with block
copolymer (BCP) melts leads to the formation of a superstructure of side-to-side NRs
perpendicular to the lamellar axis. A mesoscopic model is validated against scan-
ning electron microscopy (SEM) images of CdSe NRs mixed with polystyrene-block-
poly(methyl methacrylate). It is then used to study the co-assembly of anisotropic
nanoparticles (NPs) with a length in the same order of magnitude as the lamellar spac-
ing. The phase diagram of BCP/NP is explored as well as the time evolution of the NR.
NRs that are slightly larger than the lamellar spacing are found to rotate and organise
side-to-side with a tilted orientation with respect to the interface. Strongly interacting
NPs are found to dominate the co-assembly while weakly interacting nanoparticles are
less prone to form aggregates and tend to form well-ordered configurations.

Keywords:Polymers, Numerical simulation models, Experiments, Nanoparticles
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F300 Physics
F Physical Sciences > F162 Polymer Chemistry
G Mathematical and Computer Sciences > G150 Mathematical Modelling
F Physical Sciences > F343 Computational Physics
G Mathematical and Computer Sciences > G120 Applied Mathematics
Divisions:College of Science > School of Mathematics and Physics
ID Code:40535
Deposited On:21 May 2020 14:33

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