AuPt Alloy Nanostructures with Tunable Composition and Enzyme-like Activities for Colorimetric Detection of Bisulfide

被引:121
作者
He, Weiwei [1 ]
Han, Xiangna [1 ]
Jia, Huimin [1 ]
Cai, Junhui [1 ]
Zhou, Yunlong [2 ,3 ]
Zheng, Zhi [1 ]
机构
[1] Xuchang Univ, Key Lab Micronano Mat Energy Storage & Convers He, Coll Adv Mat & Energy, Inst Surface Micro & Nano Mat, Xuchang 461000, Henan, Peoples R China
[2] Chinese Acad Sci, CNITECH, Wenzhou Inst Biomat & Engn, Wenzhou 325001, Zhejiang, Peoples R China
[3] Wenzhou Med Univ, Inst Biomat & Engn, Wenzhou 325001, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
AT-PT NANOSTRUCTURES; CATALYTIC-ACTIVITY; PLATINUM NANOPARTICLES; PEROXIDASE MIMETICS; HYDROGEN-PEROXIDE; OXIDASE; GOLD; SUPEROXIDE; PALLADIUM; DECOMPOSITION;
D O I
10.1038/srep40103
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Tuning the enzyme-like activity and studying the interaction between biologically relevant species and nano-enzymes may facilitate the applications of nanostructures in mimicking natural enzymes. In this work, AuPt alloy nanoparticles (NPs) with varying compositions were prepared through a facile method by co-reduction of Au3+ and Pt2+ in aqueous solutions. The composition could be tuned easily by adjusting the molar ratios of added Pt2+ to Au3+. It was found that both peroxidase-like and oxidase-like activity of AuPt alloy NPs were highly dependent on the alloy compositions, which thus suggesting an effective way to tailor their catalytic properties. By investigating the inhibitory effects of HS-on the enzyme-like activity of AuPt alloy NPs and natural enzyme, we have developed a method for colorimetric detection of HS-and evaluation of the inhibiting effects of inhibitors on natural and artificial enzymes. In addition, the responsive ability of this method was influenced largely by the composition: AuPt alloy NPs show much lower limit of detection for HS-than Pt NPs while Pt NPs show wider linear range than AuPt alloy NPs. This study suggests the facile way not only for synthesis of alloy nanostructures, but also for tuning their catalytic activities and for use in bioanalysis.
引用
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页数:10
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