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Issue 42, 2006
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Size-controllable one-dimensinal SnO2nanocrystals: synthesis, growth mechanism, and gas sensing property

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Abstract

Single crystalline one-dimensional (1-D) SnO2 nanocrystals with controllable sizes, including the diameter and the aspect ratio, were synthesized by modulating the precursor concentration, reaction time and temperature via a solution method. By regulating the growth in a kinetic regime, a higher temperature range (220–240 °C) was beneficial to the growth of SnO2 nanowires, while reactions below 220 °C only resulted in nanorods or even nanoparticles. The aggregates of SnO2 nanocrystals in the forms of hollow spheres and dendrites were observed as the intermediates for the nanowires. Based on the TEM and SEM observations, the growth mechanism is discussed from the viewpoints of the nature of the reverse micelles and the crystal habit of rutile SnO2. CO gas sensing measurements were also carried out for SnO2 nanocrystals with different assembly styles. The results indicate that the sensitivity had close correlation to the specific surface area of the nanocrystals.

Graphical abstract: Size-controllable one-dimensinal SnO2 nanocrystals: synthesis, growth mechanism, and gas sensing property

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Article information


Submitted
29 Mar 2006
Accepted
20 Sep 2006
First published
27 Sep 2006

Phys. Chem. Chem. Phys., 2006,8, 4874-4880
Article type
Paper

Size-controllable one-dimensinal SnO2 nanocrystals: synthesis, growth mechanism, and gas sensing property

D. Zhang, L. Sun, G. Xu and C. Yan, Phys. Chem. Chem. Phys., 2006, 8, 4874
DOI: 10.1039/B604560J

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