Solid-state transformation from self-assembled nanosheets into ordered nanorods

by Konar, Sanjit; Tian, Z. Ryan

ZnO nanostructures, with a rich collection of morphologies and spatial organizations useful in a variety of important applications, have been synthesized mainly via solution- and gas-phase approaches. Here we report a simple calcination to convert self-assembled nanosheets of hydrated ZnO, each about 50 nm thick, to ordered ZnO nanorods (similar to 200 nm in diameter and similar to 4 um in length) on glass substrates or on ZnO microcrystals through a quick calcination at 400 degrees C in air. This work is among the first using a pure solid-state transformation to convert one ordered precursory nanostructure to another with different morphology and spatial organization. Both the ordered nanorods and the self-assembled nanosheets could be useful in important applications including catalysis, sensing, gas storage, and drug delivery.

Journal
Journal of Physical Chemistry B
Volume
110
Issue
9
Year
2006
Start Page
4054
ISBN/ISSN
1520-5207; 1520-6106
DOI
10.1021/jp0561367