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Multipod znO nanoforms: low temperature synthesis and characterization.

Tandra Ghoshal¹, Soumitra Kar, Subhajit Biswas

¹Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India.

Journal of Nanoscience and Nanotechnology

|April 25, 2007

Summary

Zinc oxide (ZnO) nanotetrapods were synthesized using thermal evaporation. These high-quality ZnO nanoforms exhibit potential for applications in field emission devices.

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Area of Science:

Materials Science
Nanotechnology
Solid State Physics

Background:

Zinc oxide (ZnO) is a versatile semiconductor with significant potential in electronic and optoelectronic applications.
Controlled synthesis of ZnO nanostructures is crucial for tailoring their properties.
Nanostructures offer unique characteristics due to their high surface area and quantum effects.

Purpose of the Study:

To synthesize ZnO nanotetrapods and multipod nanoforms via a facile thermal evaporation method.
To investigate the structural and optical properties of the synthesized ZnO nanoforms.
To evaluate the potential of these ZnO nanoforms for field emission applications.

Main Methods:

Synthesis of ZnO nanotetrapods and multipod nanoforms by thermal evaporation of Zn powder at ~600°C.
Structural characterization of the tetrapod morphology and cross-section.
Optical characterization using absorbance, photoluminescence, and Raman spectroscopy.
Field emission studies to assess device applicability.

Main Results:

Successful synthesis of ZnO nanotetrapods with hexagonal cross-sections and observed interpenetrating growth.
Production of multipod ZnO nanoforms at higher temperatures.
Optical characterization confirmed excellent crystal quality of the ZnO nanoforms.
Field emission studies demonstrated the suitability of these nanoforms for device applications.

Conclusions:

Simple thermal evaporation is an effective method for producing high-quality ZnO nanotetrapods and multipod nanoforms.
The synthesized ZnO nanoforms possess excellent optical properties indicative of their crystalline perfection.
The demonstrated field emission properties suggest promising applications in advanced electronic devices.