A portable multi-channel sensing device using Au nano-urchins as probes for melamine detection in milk

被引：22

作者：

Chen, Lin ^{[1
]}

Huang, Ying ^{[1
]}

Xing, Tian Tian ^{[2
]}

Ge, LingPu ^{[1
]}

Yang, Tong ^{[2
]}

Chen, Bin ^{[1
]}

Huang, Cheng Zhi ^{[2
]}

机构：

[1] Southwest Univ, Coll Elect & Informat Engn, Chongqing Key Lab Nonlinear Circuit & Intelligent, Key Lab Luminescent & Real Time Analyt Chem,Minis, Chongqing 400715, Peoples R China

[2] Southwest Univ, Coll Pharmaceut Sci, Chongqing 400715, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2017年 / 5卷 / 31期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

CHROMATOGRAPHY/TANDEM MASS-SPECTROMETRY; RESONANCE ENERGY-TRANSFER; BARE GOLD NANOPARTICLES; VISUAL DETECTION; RAW-MILK; COLORIMETRIC PROBE; INFANT FORMULA; SURFACE; SPECTROSCOPY; CHEMISTRY;

D O I：

10.1039/c7tc01384a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Facile detection of melamine in milk was realized through a portable multi-channel sensing device using Au nanoparticles with urchin-like structures as sensing probes. The detection mechanism was based on the aggregation of Au nano-urchins, induced by the formation of Au-N bonding with melamine. The Au nano-urchins were synthesized by a seed-mediated growth method in the presence of hydroquinone, which has the localized surface plasmon absorption at about 680 nm. The results showed that the melamine detection was environment pH dependent. The optimal melamine detection condition occurred when the pH of the BR buffer was 5.72. A better selectivity to melamine was fulfilled when compared with its structurally similar compounds: cytosine, uracil, and thymine. The multi-channel sensing device has a detection limit of 18 nM for melamine in milk, which could meet the requirement for monitoring the melamine amount in milk.

引用

页码：7806 / 7812

页数：7

共 45 条

[1] Hydrogen-Bonding Recognition-Induced Color Change of Gold Nanoparticles for Visual Detection of Melamine in Raw Milk and Infant Formula [J].