کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402930 | 1392746 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fluorescence properties of Ag nanoparticles in water, methanol and hexane
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ag nanoparticles, synthesized employing the electro-exploding wire technique, are reported. Absorption in the UV-visible region by these particles is characterized by the features reported in the literature, namely, a possible plasmon peak at â¼404Â nm. For Ag nanoparticles dispersed in water, photo-excitation in the ranges 210-235 and 255-280Â nm produces similar fluorescence emission at â¼300Â nm, whose corresponding resonant absorption takes place at 215 and 270Â nm in the excitation spectra. Further, we study the effect of the surrounding medium (solvent effect) on fluorescence from these nanoparticles by comparing fluorescence emission in methanol and hexane for photo-excitation in the same range. Compared to water, fluorescence emission in methanol is observed red-shifted at â¼310Â nm, which further red-shifts to â¼325Â nm in hexane. The corresponding resonant absorptions in methanol are at 225 and 275Â nm. Consequence of this red-shift in a less polar solvent is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 129, Issue 1, January 2009, Pages 6-11
Journal: Journal of Luminescence - Volume 129, Issue 1, January 2009, Pages 6-11
نویسندگان
Om Parkash Siwach, P. Sen,