Andreoli, Enrico and Annibaldi, Valeria and Rooney, A. Denise and Breslin, Carmel B. (2011) Electrochemical Fabrication of Copper-Based Hybrid Microstructures and Mechanism of Formation of Related Hierarchical Structures on Polypyrrole Films. Journal of Physical Chemistry C, 115 (41). pp. 20076-20083. ISSN 1932-7447

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Abstract

The surface electrochemistry of polypyrrole–polystyrene sulfonate (PPy–PSS) thin films is exploited for the fabrication of novel hybrid copper-based microstructures. The electrochemical deposition of the copper-based materials at the PPy–PSS film is strongly dependent on the electrode potential. This dependence is studied at three different potentials: 0.10, 0.00, and −0.10 V vs SCE. Hierarchical micro/nanostructures made of copper hydroxysulfate salts are only formed at 0.10 V vs SCE and are replaced with branched and single microcrystals of Cu2O covered by a thin layer of Cu(OH)2 at 0.00 and −0.10 V vs SCE, respectively. The different structures can be coupled on the same film through a simple fabrication procedure to give hybrid microstructures. These novel hybrids consist of a central microcrystal (deposited at −0.10 V vs SCE) and a surrounding contour of welded nanosheets (deposited at 0.10 V vs SCE). The mechanism of nucleation and growth of the hierarchical micro/nanostructures formed at 0.10 V vs SCE is also reported. These structures are made from the assembly of nanoparticles into nanowires, nanosheets, and microclusters. These microclusters have a flowerlike shape within which each nanosheet forms a petal of the flower. The nucleation of the clusters is shown to be progressive.

Item Type:	Article
Keywords:	Electrochemical Fabrication; Copper-Based Hybrid Microstructures; polypyrrole–polystyrene sulfonate (PPy–PSS); Polypyrrole Films; Hierarchical structures;
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	7911
Identification Number:	https://doi.org/10.1021/jp204092x
Depositing User:	Dr. Carmel Breslin
Date Deposited:	14 Feb 2017 12:36
Journal or Publication Title:	Journal of Physical Chemistry C
Publisher:	American Chemical Society
Refereed:	Yes
Funders:	Environmental Protection Agency (EPA), Science Foundation Ireland (SFI)
URI:	http://pubs.acs.org
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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