کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1688242 1518947 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Observation of low turn-on field emission from nanocomposites of GO/TiO2 and RGO/TiO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Observation of low turn-on field emission from nanocomposites of GO/TiO2 and RGO/TiO2
چکیده انگلیسی


• Simple way of electrophoretic was employed for synthesis of nanocomposites.
• Low turn on field 2.6 V/μm for RGO/TiO2 nanocomposite has been found.
• Low turn on field attributed due to high enhancement factor.
• Stable nature of emission current has been found.

Highly dense TiO2 nanotubes were synthesized by anodization of titanium foil. The TiO2 nanotubes were characterized by using XRD, FESEM, TEM and HRTEM. GO/TiO2 and RGO/TiO2 nanocomposites were synthesized by electrophoresis method using de-ionised water. FESEM images confirm complete covering of the GO and RGO nanosheets on the entire surface of TiO2 nanotubes. Field emission studies of TiO2 nanotubes, GO/TiO2 and RGO/TiO2 nanocomposites have been carried out. Turn-on field for the emission current density of 10 μA/cm2, has been observed to be 2.9 V/μm, 3.3 V/μm and 2.6 V/μm for TiO2 nanotubes, GO/TiO2 and RGO/TiO2 nanocomposites respectively. For the TiO2 nanotubes, GO/TiO2 and RGO/TiO2 nanocomposites, the field enhancement factor (β) were calculated and are found to be 2059, 1482 and 2300. The turn-on field of the RGO/TiO2 nanocomposite has been found to be superior than other reported values of TiO2 nanostructures. To the best of our knowledge this is the first report on field emission studies of GO/TiO2 and RGO/TiO2 nanocomposites. Simple synthesis route coupled with the superior field emission behavior makes the present emitter more suitable for nano-electronics application.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 123, January 2016, Pages 167–174
نویسندگان
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