Fenton-like Reaction-Mediated Etching of Gold Nanorods for Visual Detection of Co2+

doi:10.1021/la504256c

	Fenton-like Reaction-Mediated Etching of Gold Nanorods for Visual Detection of Co2+
	Zhang, Zhiyang1,2,3 ; Chen, Zhaopeng1,2 ; Pan, Dawei1,2 ; Chen, Lingxin1,2
发表期刊	LANGMUIR
ISSN	0743-7463
	2015-01-13
卷号	31 期号:1 页码:643-650
关键词	Colorimetric Detection Superoxide-dismutase Hydrogen-peroxide Fluorescent-probe Aqueous-solution Quantum Dots Cobalt Ion Nanoparticles Copper Mechanism
DOI	10.1021/la504256c
产权排序	[Zhang, Zhiyang; Chen, Zhaopeng; Pan, Dawei; Chen, Lingxin] Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China; [Zhang, Zhiyang; Chen, Zhaopeng; Pan, Dawei; Chen, Lingxin] YICCAS, Shandong Prov Key Lab Coastal Environm Proc, Yantai 264003, Shandong, Peoples R China; [Zhang, Zhiyang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
作者部门	中科院海岸带环境过程与生态修复重点实验室
英文摘要	We have proposed a Fenton-like reaction-mediated etching of gold nanorods and applied it to the sensitive visual detection of Co2+ ions. With the presence of bicarbonate (HCO3-) and hydrogen peroxide(H2O2), Co2+ ions trigger a Fenton-like reaction, resulting in the generation of superoxide radical (O-2(center dot-)). As a result, the gold nanorods are gradually etched by O-2(center dot-) in the presence of SCN-, accompanied by an obvious color change from green to red. The gold nanorods etching process preferentially occurs along the longitudinal direction, which is observed by transmission electron microscope. The etching mechanism is carefully proved by investigating the effects of different radical scavengers (e.g., dimethyl sulfoxide). The auto-oxidation of hydroxylamine assay further confirms the mechanism. Then, the main factors, including reactants concentrations, temperature, and incubation time, are specifically investigated. Under optimized conditions, we get an excellent sensing performance for Co2+ with a lower detection limit of 1.0 nM via a spectrophotometer and a visual detection limit of 40 nM. In addition, this principle may provide a new concept of intermediate-mediated etching of nanoparticles for sensing.
文章类型	期刊论文
收录类别	SCI
语种	英语
关键词[WOS]	COLORIMETRIC DETECTION ; SUPEROXIDE-DISMUTASE ; HYDROGEN-PEROXIDE ; FLUORESCENT-PROBE ; AQUEOUS-SOLUTION ; QUANTUM DOTS ; COBALT ION ; NANOPARTICLES ; COPPER ; MECHANISM
研究领域[WOS]	Department of Science and Technology of Shandong Province [BS2009DX006] ; NSFC [21275158] ; SRF for ROCS ; 100 Talents Program of the CAS
WOS记录号	WOS:000348085900080
引用统计	被引频次：74[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/8665
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
通讯作者	Chen, Zhaopeng; Chen, Lingxin
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China 2.YICCAS, Shandong Prov Key Lab Coastal Environm Proc, Yantai 264003, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhiyang,Chen, Zhaopeng,Pan, Dawei,et al. Fenton-like Reaction-Mediated Etching of Gold Nanorods for Visual Detection of Co2+[J]. LANGMUIR,2015,31(1):643-650.
APA	Zhang, Zhiyang,Chen, Zhaopeng,Pan, Dawei,&Chen, Lingxin.(2015).Fenton-like Reaction-Mediated Etching of Gold Nanorods for Visual Detection of Co2+.LANGMUIR,31(1),643-650.
MLA	Zhang, Zhiyang,et al."Fenton-like Reaction-Mediated Etching of Gold Nanorods for Visual Detection of Co2+".LANGMUIR 31.1(2015):643-650.

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