{"title":"Gold Nanoparticle-based Colorimetric Sensor for pH Sensing","authors":"Lin ZHU , Dong-hua XUE , Zhen-xin WANG","doi":"10.1016/S1005-9040(08)60113-0","DOIUrl":null,"url":null,"abstract":"<div><p>We present a newly designed colorimetric sensor sensitive to pH value based on a gold nanocomposite composed of gold nanoparticles and pH-sensitive polymer{dodecylthioether end functionalized poly[2-(diethylamino) ethyl methacrylate], poly(DEAEMA)-DDT}. We have shown that this design can produce stable GNP precipitate under weakly basic condition(pH=7.5) and this precipitate can be dispersed in acidic solution(pH=4.0), due to the 2-(diethylamino) ethyl methacrylate protonated by H<sup>+</sup>. The precipitation-dispersion process is reversible and accompanied by distinct color change that are clearly visible to the naked eye. This development may have application in the controlled fabrication of reversible pH-sensitive nanostructures and/or devices.</p></div>","PeriodicalId":9785,"journal":{"name":"Chemical Research in Chinese Universities","volume":"24 5","pages":"Pages 537-540"},"PeriodicalIF":3.0000,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-9040(08)60113-0","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Research in Chinese Universities","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1005904008601130","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 6
Abstract
We present a newly designed colorimetric sensor sensitive to pH value based on a gold nanocomposite composed of gold nanoparticles and pH-sensitive polymer{dodecylthioether end functionalized poly[2-(diethylamino) ethyl methacrylate], poly(DEAEMA)-DDT}. We have shown that this design can produce stable GNP precipitate under weakly basic condition(pH=7.5) and this precipitate can be dispersed in acidic solution(pH=4.0), due to the 2-(diethylamino) ethyl methacrylate protonated by H+. The precipitation-dispersion process is reversible and accompanied by distinct color change that are clearly visible to the naked eye. This development may have application in the controlled fabrication of reversible pH-sensitive nanostructures and/or devices.
期刊介绍：
The journal publishes research articles, letters/communications and reviews written by faculty members, researchers and postgraduates in universities, colleges and research institutes all over China and overseas. It reports the latest and most creative results of important fundamental research in all aspects of chemistry and of developments with significant consequences across subdisciplines.
Main research areas include (but are not limited to):
Organic chemistry (synthesis, characterization, and application);
Inorganic chemistry (bio-inorganic chemistry, inorganic material chemistry);
Analytical chemistry (especially chemometrics and the application of instrumental analysis and spectroscopy);
Physical chemistry (mechanisms, catalysis, thermodynamics and dynamics);
Polymer chemistry and polymer physics (mechanisms, material, catalysis, thermodynamics and dynamics);
Quantum chemistry (quantum mechanical theory, quantum partition function, quantum statistical mechanics);
Biochemistry;
Biochemical engineering;
Medicinal chemistry;
Nanoscience (nanochemistry, nanomaterials).
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