A colorimetric sensor based on catechol-terminated mixed self-assembled monolayers modified gold nanoparticles for ultrasensitive detections of copper ions

作者：Ye, Siqiu; Shi, Xinhao; Gu, Wei; Zhang, Yixuan; Xian, Yuezhong^*

来源：Analyst, 2012, 137(14): 3365-3371.

DOI：10.1039/c2an35311c

• CDS QUANTUM DOTS
• ELECTROORGANIC SYNTHESIS
• AQUEOUS-MEDIA
• DERIVATIVES
• ELECTRODES
• PEPTIDE
• WATER
• ASSAY
• LEAD

A colorimetric sensor for Cu(II) ions has been developed based on mixed self-assembled monolayers (SAMs) modified gold nanoparticles (AuNPs). The AuNPs were modified with mixed SAMs consisting of mercaptosuccinic acid and the product of electrochemically triggered Michael addition reaction of 4-thiouracil and catechol. In the presence of Cu(II) ions, the coordination of Cu2+ to catechol-terminated AuNPs leads to aggregation-induced changes of surface plasmon resonance. The cost-effective chemical sensor allows rapid, sensitive and selective detection of Cu2+ ions, indicating its potential application in environmental field.

• 单位
  华东师范大学