Tuning ordered pattern of Pd species through controlled block copolymer self-assembly

De Rosa, C., Auriemma, F., Malafronte, A., Di Girolamo, R., Lazzari, M., Nieto-Suarez, M., Hermida-Merino, D., Hamley, I. W. ORCID: https://orcid.org/0000-0002-4549-0926 and Portale, G. (2016) Tuning ordered pattern of Pd species through controlled block copolymer self-assembly. Journal of Physical Chemistry B, 120 (27). pp. 6829-6841. ISSN 1520-5207 doi: 10.1021/acs.jpcb.6b04380

Abstract/Summary

We report a method for the preparation of ordered patterns of Pd species on a substrate based on the use of polystyrene-block-poly(ethylene oxide) copolymer (PS-b-PEO) templates and selective inclusion of palladium (Pd) species in the PEO domains. PS-b-PEO samples of different total molecular masses self-assemble in a cylindrical microphase-separated morphology, in which vertically aligned PEO cylinders, with different diameters depending on the molecular mass, are organized in a hexagonal array of different lateral spacings. The cylindrical nanostructure is maintained after the selective inclusion of Pd species (Pd acetate and Pd nanoparticles (NPs) after reduction of Pd ions of the salt) in the PEO cylinders so that the characteristic sizes (diameters and lateral spacings) of the included Pd species are tuned by the characteristic sizes of the block copolymer (BCP) template, which are regulated by molecular mass. Treatment of nanocomposites at elevated temperatures in air removes the polymer matrix and leads to the formation of arrays of palladium oxide (PdO) NPs covering a solid support. The patterns of PdO NPs are characterized by different particle diameters and gap distances, mirroring the patterns and characteristic nanodimensions of the parent BCPs used as templates.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/66600
Identification Number/DOI	10.1021/acs.jpcb.6b04380
Refereed	Yes
Divisions	Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Publisher	American Chemical Society
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