A colorimetric sensor based on catechol-terminated mixed self-assembled monolayers modified gold nanoparticles for ultrasensitive detections of copper ions
Siqiu Ye, Xinhao Shi, Wei Gu, Yixuan Zhang and Yuezhong Xian
{"title":"A colorimetric sensor based on catechol-terminated mixed self-assembled monolayers modified gold nanoparticles for ultrasensitive detections of copper ions","authors":"Siqiu Ye, Xinhao Shi, Wei Gu, Yixuan Zhang and Yuezhong Xian","doi":"10.1039/C2AN35311C","DOIUrl":null,"url":null,"abstract":"<p >A colorimetric sensor for Cu(<small>II</small>) ions has been developed based on mixed self-assembled monolayers (SAMs) modified <annref>gold nanoparticles</annref> (AuNPs). The AuNPs were modified with mixed SAMs consisting of <compname>mercaptosuccinic acid</compname> and the product of electrochemically triggered Michael addition reaction of <compname>4-thiouracil</compname> and <compname>catechol</compname>. In the presence of Cu(<small>II</small>) ions, the coordination of Cu<small><sup>2+</sup></small> to <annref>catechol</annref>-terminated AuNPs leads to aggregation-induced changes of <annref>surface plasmon resonance</annref>. The cost-effective chemical sensor allows rapid, sensitive and selective detection of Cu<small><sup>2+</sup></small> ions, indicating its potential application in environmental field.</p>","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 14","pages":" 3365-3371"},"PeriodicalIF":3.3000,"publicationDate":"2012-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/C2AN35311C","citationCount":"23","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analyst","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2012/an/c2an35311c","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 23
Abstract
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.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
