DMSA-Functionalized Gold Nanorod on Paper for Colorimetric Detection and Estimation of Arsenic (III and V) Contamination in Groundwater
| Autor: | Peuli Nath, Nivedita Priyadarshni, Nripen Chanda, Nagahanumaiah |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Detection limit
Renewable Energy Sustainability and the Environment General Chemical Engineering Metal ions in aqueous solution 010401 analytical chemistry Arsenate chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Arsenic contamination of groundwater chemistry.chemical_compound chemistry Environmental Chemistry Nanorod 0210 nano-technology Ethylene glycol Arsenic Arsenite Nuclear chemistry |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 6:6264-6272 |
| ISSN: | 2168-0485 |
| Popis: | 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: AsIII (arsenite) and AsV (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 AsIII and AsV ions with a detection limit of ∼1.0 ppb. In addition, the GNR-PEG-DMSA exhibits excellent potential for quantitative estimation of total arsenic in groundwater samples. The paper-based sensi... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|