THE EFFECT OF TEMPERATURE, GAS FLOW AND MORPHOLOGY ON GAS SENSING PROPERTIES OF ZNC OXDENANOFLOWERS AND NANORODS

Publish Year: 1390
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

UFGNSM03_029

تاریخ نمایه سازی: 10 تیر 1396

Abstract:

In this paper, we have synthesized one-dimensional nanostructure of zinc oxide and studied the properties of these structures in order to evaluate in oxygen gas sensors. The method has been used for synthesis of these nanostructures is Chemical Vapor Deposition (CVD), which is performed by means of an electric furnace and direct oxidation technique. Structural studies of the nanostructures of zinc oxide clearly represent the formation of nanowires, nanorods, and nanoflowers. These studies show that the diameter of the synthesized nanowires is about 70-80 nanometer, and their length is about several microns. On the other hand, the length of the nanorods is less than one micron, but their diameter is similar to nanowires. Also, the nanostructure of some of the samples is similar to coral stones. Oxygen sensing measurements of different samples represent that the samples grown on alumina substrate have a better sensitivity in comparison to the other samples. The oxygen gas sensing properties of different ZnO nanostructure sensors were tested at different temperatures ranging from room temperature to 150°C to optimize working temperature. The experiments were done to examine the responses of the ZnO nanostructures with different morphologies to oxygen gas thus the gas response were compared for ZnO nanowires, nanorods and nanoflowers.

Authors

H. MINAEE

Physics Department, Shahrood University of Technology, Shahrood, , Iran

S.H. MOUSAVI

Physics Department, Shahrood University of Technology, Shahrood, ۳۶۱۹۹۹۵۱۶۱, Iran

H. HARATIZADEH

Physics Department, Shahrood University of Technology, Shahrood, ۳۶۱۹۹۹۵۱۶۱, Iran