期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 5, 页码 6264-6272出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b00068
关键词
Gold nanorod; DMSA; Sensor; Arsenic; Detection; Estimation
资金
- DBT grant [GAP-101612]
- CSIR grant [ESC0112]
Functionalization of gold nanorod (GNR) with dimercaptosuccinic acid is reported as a way to develop a sensor, GNR-PEG-DMSA that can rapidly detect very low concentrations of arsenic contamination in water and using the paper strip. The sensor is developed by stepwise chemical conjugations of gold nanorods (GNR) with poly(ethylene glycol) methyl ether thiol (mPEG-SH) followed by meso-2,3-dimercaptosuccinic acid (DMSA). GNR-PEG-DMSA shows a visible color change in the presence of both inorganic forms of arsenic: As-III (arsenite) and As-V (arsenate) ions in solution and on a paper substrate, because of the ion-induced aggregation of nanorods through an arsenic complex formation strategy, which is relative to the arsenic concentrations. Colorimetric and spectroscopic analyses are very much selective for both As-III and As-V ions with a detection limit of similar to 1.0 ppb. In addition, the GNR-PEG-DMSA exhibits excellent potential for quantitative estimation of total arsenic in groundwater samples. The paper-based sensing method demonstrates the usefulness in arsenic level screening under field-test mode.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据