کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1522828 | 995316 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface characterization of GSH-CdTe quantum dots
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The surface characterization of CdTe QDs synthesized by a novel procedure using glutathione (GSH), low temperatures (60-90 °C) and K2TeO3 as the -Te precursor is reported. Fluorescence of the produced QDs is stable in the pH range 6-13 and QDs inside eukaryotic cells are highly fluorescent. The surface composition of GSH-CdTe QDs with different spectroscopic properties and particle size distributions was determined by XPS. The XPS analysis indicated that the QDs are essentially CdTe, although all nanoparticles contain 12-24% of CdO (and in one case also TeO2). GSH decomposes with reaction time releasing small amounts of Sâ2 ions that react with Cd(Te) to yield Cd(Te)S in a smaller amount than that of CdTe. Finally, the use of QDs in fluorescence mediated immunodetection of bacterial pathogens has been evaluated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 140, Issue 1, 15 June 2013, Pages 113-118
Journal: Materials Chemistry and Physics - Volume 140, Issue 1, 15 June 2013, Pages 113-118
نویسندگان
J.L. Gautier, J.P. Monrás, I.O. Osorio-Román, C.C. Vásquez, D. Bravo, T. Herranz, J.F. Marco, J.M. Pérez-Donoso,