کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5397888 1505874 2017 7 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
L-cysteine and 3-mercaptopropionic acid capped cadmium selenide quantum dots based metal ion probes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
L-cysteine and 3-mercaptopropionic acid capped cadmium selenide quantum dots based metal ion probes
چکیده انگلیسی
Herein, a report on the synthesis of 3-mercaptopropionic acid (MPA) and L cysteine (Cyst) capped luminescent cadmium selenide (CdSe) quantum dots (QDs) was studied. The MPA-CdSe and Cyst-CdSe QDs were conducted with different physiologically important metal ions such as Cu2+, Fe2+, Zn2+, Co2+, Pb2+, Mg2+, Ni2+ and Ag+ ions in aqueous solution using fluorescence spectroscopic technique. It was found that the MPA-CdSe QDs, categorically sensitive to only Cu2+ ions only. However, other metal ions such as Zn2+, Co2+, Pb2+, Mg2+, Ni2+ and Ag+, did not exhibit measurable quenching. On the other hand, Cyst-CdSe QDs were very selective and sensitive to Zn2+ ions only, which showed fluorescence enhancement while for other ions no such behavior was noticed. Thus, MPA-CdSe and Cyst-CdSe QDs have successfully detected Cu2+ and Zn2+ ions in the linearity range from 4 to 160 µM, respectively. The effect of fluorescence response of QDs towards metals ions were described by Langmuir-type binding model or Stern-Volmer-type equation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 187, July 2017, Pages 126-132
نویسندگان
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