کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1794357 | 1023695 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
X-ray diffraction and Raman scattering study of thermal-induced phase transformation in vertically aligned TiO2 nanocrystals grown on sapphire(1Â 0Â 0) via metal organic vapor deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: X-ray diffraction and Raman scattering study of thermal-induced phase transformation in vertically aligned TiO2 nanocrystals grown on sapphire(1Â 0Â 0) via metal organic vapor deposition X-ray diffraction and Raman scattering study of thermal-induced phase transformation in vertically aligned TiO2 nanocrystals grown on sapphire(1Â 0Â 0) via metal organic vapor deposition](/preview/png/1794357.png)
چکیده انگلیسی
We report a detailed study of thermal-induced phase transformation in TiO2 nanocrystals (NCs) via X-ray diffraction (XRD) and Raman scattering (RS) spectroscopy. Vertically aligned anatase TiO2(1 1 0) NCs were grown on the sapphire (SA)(1 0 0) substrate at 550 °C by metal organic chemical vapor deposition, using titanium-tetraisopropoxide (TTIP, Ti[OCH(CH3)2]4), as the source reagent. The effects of thermal annealing of TiO2 NCs in oxygen atmosphere between 600 and 1000 °C were investigated. XRD and RS spectra showed the onset of the phase transformation process from the as-grown anatase TiO2(1 1 0) NCs into rutile TiO2(0 0 1) at the annealing temperature of 800 °C. At annealing temperature higher than 900 °C, pure rutile phase of TiO2(0 0 1) NCs were formed and the crystalline quality of TiO2 NCs could be further improved upon higher annealing temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 310, Issue 15, 15 July 2008, Pages 3663-3667
Journal: Journal of Crystal Growth - Volume 310, Issue 15, 15 July 2008, Pages 3663-3667
نویسندگان
C.A. Chen, K.Y. Chen, Y.S. Huang, D.S. Tsai, K.K. Tiong, F.Z. Chien,