Colorimetric Sensor Array Based on Gold Nanoparticles and Amino Acids for Identification of Toxic Metal Ions in Water

被引：179

作者：

Sener, Gulsu ^{[1
,2
]}

Uzun, Lokman ^{[1
]}

Denizli, Adil ^{[1
]}

机构：

[1] Hacettepe Univ, Fac Sci, Dept Chem, Ankara, Turkey

[2] Hacettepe Univ, Inst Sci, Nanotechnol & Nanomed Div, Ankara, Turkey

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 21期

关键词：

toxic metal ions; gold nanoparticles; colorimetric assays; sensor array; environmental monitoring; HG2+; AGGREGATION; AG+;

D O I：

10.1021/am5071283

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A facile colorimetric sensor array for detection of multiple toxic heavy metal ions (Hg2+, Cd2+, Fe3+, Pb2+, Al3+, Cu2+, and Cr3+) in water is demonstrated using 11-mercaptoundecanoic acid (MUA)-capped gold nanoparticles (AuNPs) and five amino acids (lysine, cysteine, histidine, tyrosine, and arginine). The presence of amino acids (which have functional groups that can form complexes with metal ions and MUA) regulates the aggregation of MUA-capped particles; it can either enhance or diminish the particle aggregation. The combinatorial colorimetric response of all channels of the sensor array (i.e., color change in each of AuNP and amino acid couples) enables naked-eye discrimination of all of the metal ions tested in this study with excellent selectivity.

引用

页码：18395 / 18400

页数：6

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