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
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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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
Journal: Journal of Luminescence - Volume 129, Issue 12, December 2009, Pages 1762-1766
نویسندگان
Yue-Lin Huang, Yu-Te Lee, Vincent Yeh, C.L. Cheng,