کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5008884 | 1462040 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A sensitive Galvanic replacement reaction-SERS method for Au(III) with Victoria blue B molecular probes in silver nanosol substrate
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A sensitive Galvanic replacement reaction-SERS method for Au(III) with Victoria blue B molecular probes in silver nanosol substrate A sensitive Galvanic replacement reaction-SERS method for Au(III) with Victoria blue B molecular probes in silver nanosol substrate](/preview/png/5008884.png)
چکیده انگلیسی
Stable silver nanosol (AgNP) was prepared by the light-wave procedure. Based on the Galvanic replacement reaction (GRR) of Au(III) on AgNP surface and using Victoria blue B (VBB) as molecular probes, a surface-enhanced Raman scattering (SERS) quantitative analysis of trace Au(III) was developed. VBB has no SERS signal in the dispersed AgNP sol substrate. Addition of NaCl, the VBB produced strong surface-enhanced Raman signals at 1381Â cmâ1 in the aggregated AgNP sol substrate. When Au(III) is present in the system, the surface Ag atoms interact with Au(III) to form Ag+ and Au due to the potential difference, and the Au atom and AgCl deposited on the AgNP surface to reduce the SERS activity significantly and result in SERS signal quenching. The quenched SERS signal is linear to Au(III) concentration in the range of 25-625Â nmol/L, with a detection limit of 8Â nmol/L. The GRR system can be also monitored by resonance Rayleigh scattering (RRS) spectroscopy, Au can be detected by SERS and RRS methods, and the former is more sensitive.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 251, November 2017, Pages 404-409
Journal: Sensors and Actuators B: Chemical - Volume 251, November 2017, Pages 404-409
نویسندگان
Zhiliang Jiang, Chongning Li, Yuyao Liu, Qi Jing, Aihui Liang,