Electrostatic assembly of gold nanoparticles on black phosphorus nanosheets for electrochemical aptasensing of patulin

被引：80
|
作者：
Xu, Jinqiong [1 ]
Qiao, Xiujuan [1 ]
Wang, Yuan [2 ]
Sheng, Qinglin [2 ,3 ]
Yue, Tianli [2 ]
Zheng, Jianbin [1 ]
Zhou, Ming [4 ,5 ]
机构：
[1] Northwest Univ, Shaanxi Prov Key Lab Electroanalyt Chem, Key Lab Synthet & Nat Funct Mol Chem, Coll Chem & Mat Sci,Minist Educ, Xian 710069, Shaanxi, Peoples R China
[2] Northwest Univ, Coll Food Sci & Engn, Xian 710069, Shaanxi, Peoples R China
[3] Nanjing Univ, State Key Lab Analyt Chem Life Sci, Nanjing 210023, Jiangsu, Peoples R China
[4] Northeast Normal Univ, Key Lab Polyoxometalate Sci, Fac Chem, Minist Educ, Changchun 130024, Jilin, Peoples R China
[5] Northeast Normal Univ, Natl & Local United Engn Lab Power Batteries, Changchun 130024, Jilin, Peoples R China
来源：
MICROCHIMICA ACTA | 2019年 / 186卷 / 04期
基金：
美国国家科学基金会;
关键词：
Electrochemical sensor; Impedimetric; Electron transfer; Two-dimensional nanomaterials; Aptamer; MOLECULARLY IMPRINTED POLYMER; ENERGY-TRANSFER; APPLE; IONIZATION; DOTS; FOOD;
D O I：
10.1007/s00604-019-3339-3
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An aptamer based impedimetric assay for the mycotoxin patulin (PAT) is described. A glassy carbon electrode (GCE) was modified with black phosphorus nanosheets (BP NSs) and modified with PAT aptamer by electrostatic attraction. Detection is based on the variations of electron transfer resistance at the modified electrode surface. This assay can detect PAT over a linear range that extends from 1.0nM to 1.0M with a 0.3nM detection limit. To improve the performance of the sensor, the BP NS-GCE was further modified with gold nanoparticles and then with thiolated PAT aptamer. This modified electrode, operated at an applied potential of 0.18V (vs. Ag/AgCl), has a wider linear range (0.1nM to 10.0M) and a lower detection limits (0.03nM). Both assays were successfully applied to the analysis of (spiked) genuine food samples.
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页数：8
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