کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7232772 | 1470964 | 2015 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrasensitive SERS detection of mercury based on the assembled gold nanochains
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Mercuric ions (Hg2+) mediate the transformation of single-stranded DNA to form double helical DNA by T-Hg2+-T interaction between base pairs. With this strategy, DNA modified gold nanoparticles (Au NPs) were assembled into chains which were displayed remarkable surface-enhanced Raman scattering (SERS) signal. Under optimized conditions, the length of gold nanochains was directly proportional to the mercuric ions concentrations over 0.001-0.5 ng mLâ1 and the limit of detection (LOD) in drinking water was as low as 0.45 pg mLâ1. With ultrasensitivity and excellent selectivity, this feasible and simple method is potentially as a promising tool for monitoring of mercury ions in food safety and environmental applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 67, 15 May 2015, Pages 472-476
Journal: Biosensors and Bioelectronics - Volume 67, 15 May 2015, Pages 472-476
نویسندگان
Liguang Xu, Honghong Yin, Wei Ma, Hua Kuang, Libing Wang, Chuanlai Xu,