کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9789730 1512915 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Infrared and Raman spectroscopies of InP/II-VI core-shell nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Infrared and Raman spectroscopies of InP/II-VI core-shell nanoparticles
چکیده انگلیسی
We use infrared (IR) and Raman spectroscopies to investigate the optically active phonon modes in InP nanoparticles and InP/II-VI core-shell nanoparticles fabricated by similar colloidal chemistry methods. The IR transmission spectra of several InP nanoparticle samples exhibit a common absorption feature, which we assign to the Fröhlich mode. The Raman results for the same samples show transverse and longitudinal optical phonon peaks, and scattering strength in between due to surface optical (SO) modes. Infrared spectra of the InP/ZnSe core-shell nanoparticles (T=8-300K) exhibit three absorption features, one due to the InP core, and the others associated with the ZnSe shell layer. Raman measurements (12-292 K) also show three phonon-related peaks, whose intensities vary sharply with temperature. The frequencies of the IR and Raman lines are in approximate accord with dielectric continuum theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 26, Issues 1–4, February 2005, Pages 14-18
نویسندگان
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