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Wet Chemical Approaches to Patterned Arrays of Well-Aligned ZnO Nanopillars Assisted by Monolayer Colloidal Crystals

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Hexagonally patterned arrays of well-aligned, regular ZnO nanopillars with controlled size, shape,
and orientation were directly fabricated on zinc foils via a facile wet chemical approach with the assistance
of monolayer colloidal crystals (MCC). Two kinds of templates that were derived from MCC, i.e., inverted
MCC (IMCC) and connected MCC (CMCC), were employed as masks to define the growth sites and
spaces on zinc foils for the realization of site-specific patterned growth of ZnO nanopillars. Individually
patterned arrays of ZnO nanopillars (i.e., one ZnO nanopillar growing at one single growth site) were
readily produced. Interestingly, the vertically aligned ZnO nanopillars were also side-oriented, indicating
a quasi-epitaxial growth on the zinc substrate. The diameter of the ZnO nanopillars can be controlled in
a wide range from 60 to 900 nm by varying the structural parameters of the MCC templates and the
growth conditions. Moreover, by decreasing the reaction solution concentration, a bundle of ZnO nanorods
rather than an individual nanopillar were selectively grown at one single growth site. The as-grown ZnO
nanopillar arrays were well-crystallized and exhibited strong excitonic emission and weak defect-related
emission at room temperature, which promises their potential applications in optical devices such as
stimulated emitters and lasing cavities.

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Informasi Detail

Judul Seri

Chemistry of Materials

No. Panggil

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Penerbit

Washington, DC : American Chemical Society., 2009

Deskripsi Fisik

Chem. Mater. 2009, 21, 891–897

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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