کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1673964 1008954 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fast-response and high sensitivity gas sensors based on SnO2 hollow spheres
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Fast-response and high sensitivity gas sensors based on SnO2 hollow spheres
چکیده انگلیسی

SnO2 hollow nanospheres have been synthesized by heat treatment of a mixture composed of SnCl4 and carbon microspheres. The SnO2 nanospheres are 100 nm in size and composed of large amount of SnO2 nanocrystals with diameters of ~ 6 nm, which is close to two times of the Debye length of SnO2. It was found that the sensitivity to 1000 ppm ethanol obtained with SnO2 hollow nanosphere-based sensors is as high as 75. The response and recovery time are only 4 and 10 s, respectively. Such excellent sensing properties can be ascribed to the small-size nanocrystals and porous structure of SnO2 hollow nanospheres, which lead to large diffusion constant.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 516, Issue 21, 1 September 2008, Pages 7840–7843
نویسندگان
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