کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1593571 1002707 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of annealing temperature on optical and magnetic properties of Cr doped ZnS nanoparticles
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effect of annealing temperature on optical and magnetic properties of Cr doped ZnS nanoparticles
چکیده انگلیسی

ZnS:Cr (3 at.%) nanoparticles were synthesized by chemical co-precipitation method using EDTA as capping agent. The samples were annealed in air for 3 h in steps of 100 °C in the temperature range of 200–700 °C. The effect of annealing temperatures on the structural and photoluminescence properties of Cr doped ZnS nanoparticles was investigated using X-ray Diffraction (XRD), a Scanning Electron Microscope (SEM), Energy Dispersive X-ray spectroscopy (EDS), Diffuse Reflectance Spectra (DRS), Vibrating Sample Magnetometer (VSM) and Photoluminescence (PL) techniques. EDS spectra confirmed the presence of Cr in the samples with expected stoichiometry. XRD studies confirmed the formation of ZnO above 500 °C. Photoluminescence studies on ZnS:Cr nanoparticles indicated that the emission wavelength is tunable in the range of 440–675 nm as a function of annealing temperature. VSM results indicated a decrease in ferromagnetism with increase in annealing temperature, perhaps due to appreciable variation in structural defects that are sensitive to annealing temperature.


► ZnS:Cr nanoparticles have been synthesized by the wet chemical route.
► The temperature dependent optical and magnetic properties were investigated.
► Tuning range of emission wavelength is 440–675 nm in the present study.
► In brief, annealing has an important role in tuning optical and magnetic properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 152, Issue 7, April 2012, Pages 596–602
نویسندگان
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