کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5402710 1392739 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phonon confinement in individual titanium dioxide nanowires
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Phonon confinement in individual titanium dioxide nanowires
چکیده انگلیسی
Size effects on the phonon modes have been unambiguously observed on single individual titanium dioxide (TiO2) nanowire using Raman spectroscopy. A template-free oxidation process using ethanol vapor was developed to control the growth and the density, length, and size distribution of the TiO2 nanowires. Scanning electron microscopy, transmission electron microscopy, and X-ray diffraction were used to characterize the morphology, crystalline phases and microstructures. Using a confocal laser probe, Raman spectroscopy revealed in the individual rutile TiO2 nanowire, the Eg, A1g vibration modes which are confined in the radial directions. Along the single-crystalline nanowire axis, the systematic size-dependent variations in the center-shift, broadening as well as the shape asymmetry of the Raman peaks can be well explained in terms of the phonon confinement model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 129, Issue 12, December 2009, Pages 1762-1766
نویسندگان
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