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Resonance light scattering determination of uranyl based on labeled DNAzyme-gold nanoparticle system

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成果类型:
期刊论文
作者:
Zhou, Bin;Shi, Lin-Fei;Wang, Yong-Sheng;Yang, Hui-Xian;Xue, Jin-Hua;...
通讯作者:
Wang, Yong-Song
作者机构:
[Zhou, Bin; Wang, Yong-Song; Yang, Hui-Xian; Yin, Ji-Cheng; Shi, Lin-Fei; Xue, Jin-Hua; Wang, Yong-Sheng; Liu, Lu; Wang, Jia-Cheng] Univ South China, Coll Publ Hlth, Hengyang 427001, Peoples R China.
通讯机构:
[Wang, Yong-Song] U
Univ South China, Coll Publ Hlth, Hengyang 427001, Peoples R China.
语种:
英文
关键词:
DNAzyme/Gold nanoparticles;Resonance light scattering;Uranyl
期刊:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
ISSN:
1386-1425
年:
2013
卷:
110
页码:
419-424
基金类别:
National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21177052]; Science and Technology Program of Hunan Province in China [2010SK3039]; Construct Program of the Key Discipline (Public Health and Preventive Medicine) in Hunan Province
机构署名:
本校为第一且通讯机构
院系归属:
公共卫生学院
摘要:
A resonance light scattering (RLS) method has been developed using a uranyl (UO22+) specific DNAzyme and gold nanoparticles (AuNPs). In this strategy, the cleavage of the substrate strand (SDNA) of DNAzyme results in releasing a shorter duplex in the presence of UO22+, leading to the aggregation of AuNPs and the increase of RLS intensity. The response signals linearly correlated with the concentration of UO22+ over the range of 1.36 ×10-8-1.50 ×10-7 mol L-1. The limit of detection (LOD) is 4.09 ×10-9 mol L-1. The method has excellent selectivity and higher sensitivity. It cou...

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