YIC-IR  > 中科院海岸带环境过程与生态修复重点实验室
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
Source PublicationLANGMUIR
ISSN0743-7463
2015-01-13
Volume31Issue:1Pages:643-650
KeywordColorimetric Detection Superoxide-dismutase Hydrogen-peroxide Fluorescent-probe Aqueous-solution Quantum Dots Cobalt Ion Nanoparticles Copper Mechanism
DOI10.1021/la504256c
Contribution Rank[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
Department中科院海岸带环境过程与生态修复重点实验室
AbstractWe 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.
Subtype期刊论文
Indexed BySCI
Language英语
WOS KeywordCOLORIMETRIC DETECTION ; SUPEROXIDE-DISMUTASE ; HYDROGEN-PEROXIDE ; FLUORESCENT-PROBE ; AQUEOUS-SOLUTION ; QUANTUM DOTS ; COBALT ION ; NANOPARTICLES ; COPPER ; MECHANISM
WOS Research AreaDepartment of Science and Technology of Shandong Province [BS2009DX006] ; NSFC [21275158] ; SRF for ROCS ; 100 Talents Program of the CAS
WOS IDWOS:000348085900080
Citation statistics
Cited Times:50[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/8665
Collection中科院海岸带环境过程与生态修复重点实验室
Corresponding AuthorChen, Zhaopeng; Chen, Lingxin
Affiliation1.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
Recommended Citation
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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