کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5364515 1503702 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of Y2O3:Er,Yb nanoparticles by laser ablation in liquid
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Preparation of Y2O3:Er,Yb nanoparticles by laser ablation in liquid
چکیده انگلیسی

We prepared a Y2O3:Er,Yb nanoparticles by laser ablation in liquid. The laser used the second harmonic generation Nd:YAG (532 nm). A preparation process and measurement of upconversion properties were performed by varying the range of the energy density of the laser. Images from scanning electron microscopy (SEM) indicated that two types of nanoparticles existed in the product of laser ablation in liquid. We concluded the following: one type of nanoparticles was prepared from the nucleation of materials in a plume and the other was prepared by fragmentation. In the photoluminescence spectra, green (2H11/2, 4S3/2 → 4I15/2) and red (4F9/2 → 4I15/2) fluorescence were observed using a 980 nm laser diode (LD) as the excitation source. We confirmed that the fluorescence intensity increased with increasing energy density of the laser. Thus, we concluded that the number of the nanoparticles increased as the energy density of the laser was increased.

► We prepared a Y2O3:Er,Yb nanoparticles by laser ablation in liquid. ► The particle size increased with the increasing energy density of the laser. ► At low energy density, dot-like nanoparticles were observed. At high energy density, worm-like nanoparticles were observed. ► In the photoluminescence spectra, green and red fluorescence were observed using a 980 nm laser diode as the excitation source. ► The fluorescence intensity increased with increasing energy density of the laser.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 261, 15 November 2012, Pages 118-122
نویسندگان
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