期刊
ACS APPLIED NANO MATERIALS
卷 4, 期 11, 页码 11674-11680出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c02245
关键词
nanostructures; growth process; nanosensor; nitrite detection; customizable setting
资金
- Applied Basic Research Project of Sichuan Province [2018JY0062]
- Chengdu Science and Technology Benefit to the People Research and Development Project [2015-HM01-00385-SF]
- Research Initiated Project of Chengdu University [2081921109]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB36000000]
- National Basic Research Program of China [2016YFA0200903]
- National Natural Science Foundation of China [22072032]
A method designed to detect nitrites through modulating silver growth on gold nanospheres with 4-ATP has been shown to have a low detection limit and a wide detection range. The method exhibits good selectivity and provides a universal design scheme for high-performance detection methods.
Nitrite(NO2-) in water and food is a potential threat to human health. The determination of nitrite content is very significant for people's life safety. Here, 4-aminothiophenol (4-ATP)-modulated silver growth on gold nanospheres (GNSs) was designed to detect nitrite. It was verified that the exposed amino groups of 4-ATP molecules on GNSs can accelerate Ag overgrowth. On the contrary, the deamination reaction of 4-ATP with nitrite can reduce the Ag overgrowth rates. 4-ATP modified on GNSs can not only increase the spectrophotometry response of nitrite with a low limit of detection (LOD = 36 nM) but also obtain a wide and flexible detection range (0-60 mu M). In addition, this method showed good selectivity to nitrite. The excellent optical response, the sharp contrast between the acceleration and deceleration of Ag growth, and the customizable basic setting of the sensing ligands can provide a universal design scheme for high-performance detection methods.
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