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Ultrahigh density arrays of toroidal ZnO nanostructures by one-step cooperative self-assembly processes: Mechanism of structural evolution and hybridization with au nanoparticles

Title
Ultrahigh density arrays of toroidal ZnO nanostructures by one-step cooperative self-assembly processes: Mechanism of structural evolution and hybridization with au nanoparticles
Authors
Jang Y.H.Yang S.Y.Jang Y.J.Park C.Kim J.K.Kim D.H.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2011
Journal Title
Chemistry - A European Journal
ISSN
0947-6539JCR Link
Citation
vol. 17, no. 7, pp. 2069 - 2076
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A quick protocol for the fabrication of ultrahigh density arrays of toroidal ZnO nanostructures with tailored structures on a substrate surface is presented based on the one-step spin coating of a common solution composed of inverse micelles of polystyrene-block-poly(4-vinyl pyridine) copolymers (PS-b-P4VP) and sol-gel precursors without the need of conventional complex lithographic techniques. ZnO toroids decorated with gold nanoparticles are also obtained by subsequent loading and reduction of metallic precursors. It was elucidated that the diethanolamine moiety in the sol-gel precursors, which induces selective swelling and structural reorganization of the P4VP core blocks, plays a key role in the generation of toroidal nanostructures. Toroidal ZnO nanostructures embedded in a PS-b-P4VP matrix films or arrays of pure wurtzite ZnO nanorings are obtained by calcination under inert atmosphere. The structural parameters of the toroidal nanostructures such as the width, height, diameter of the rims as well as the spacing of their 2D arrays are controlled by employing PS-b-P4VP with different molecular weight and varying the mixing protocols. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
DOI
10.1002/chem.201002912
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자연과학대학 > 화학·나노과학전공 > Journal papers
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