کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1814855 1025656 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-temperature growth and ethanol-sensing characteristics of quasi-one-dimensional ZnO nanostructures
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Low-temperature growth and ethanol-sensing characteristics of quasi-one-dimensional ZnO nanostructures
چکیده انگلیسی

ZnO nanorods, nanobelts, nanowires, and tetrapod nanowires were synthesized via thermal evaporation of Zn powder at temperatures in the range 550–600 °C under flow of Ar or Ar/O2 as carrier gas. Uniform ZnO nanowires with diameter 15–25 nm and tetrapod nanowires with diameter 30–50 nm were obtained by strictly controlling the evaporation process. Our experimental results revealed that the concentration of O2 in the carrier gas was a key factor to control the morphology of ZnO nanostructures. The gas sensors fabricated from quasi-one-dimensional (Q1D) ZnO nanostructures exhibited a good performance. The sensor response to 500 ppm ethanol was up to about 5.3 at the operating temperature 300 °C. Both response and recovery times were less than 20 s. The gas-sensing mechanism of the ZnO nanostructures is also discussed and their potential application is indicated accordingly.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 403, Issue 1, 1 January 2008, Pages 50–56
نویسندگان
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