کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7140639 | 1462027 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Green synthesis of reduced graphene oxide-Ag nanoparticles as a dual-responsive colorimetric platform for detection of dopamine and Cu2+
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Green synthesis of reduced graphene oxide-Ag nanoparticles as a dual-responsive colorimetric platform for detection of dopamine and Cu2+ Green synthesis of reduced graphene oxide-Ag nanoparticles as a dual-responsive colorimetric platform for detection of dopamine and Cu2+](/preview/png/7140639.png)
چکیده انگلیسی
A one pot rapid and green synthesis approach using pine (Pinus densiflora) leaf extracts was developed to prepare AgNPs decorated with graphene nanocomposites (rGO@AgNPs). The rGO@AgNPs was used for an innovative, facile and reliable dual functional assay of dopamine (DA) and copper ions (Cu2+). Synergistic interactions of DA with rGO@AgNPs through Ï-Ï interactions and hydrogen bindings could induce aggregation of the rGO@AgNPs and color changing of the solution from yellow to brown. The UV-vis absorption ratio (A515/A405), corresponded to the color changes, was monitored for quantitative determination of DA. The sensor was also utilized to detect Cu2+ through an anti-aggregation mechanism. Cu2+ ions could prevent aggregation of rGO@AgNPs through formation of a complex with DA, and DA acted as a selective chelating agent for Cu2+. In the presence of a certain amount of DA, the aggregation of rGO@AgNPs decreased by increasing the concentration of Cu2+ ions in the solution. It accompanies with a color change from brown to yellow and increasing the absorption ratio of A405/A515. The limit of detection (LOD) for DA and Cu2+ were estimated as 16 and 9.8â¯nM, respectively. The green synthesized rGO@AgNPs were used for selective detection of DA and Cu2+ in human urine and tomato samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 262, 1 June 2018, Pages 499-507
Journal: Sensors and Actuators B: Chemical - Volume 262, 1 June 2018, Pages 499-507
نویسندگان
Sedigheh Basiri, Ali Mehdinia, Ali Jabbari,