{"title":"Solvent-based dual detection of Hg2+ and Cr3+ ions by polyvinylpyrrolidone stabilized silver nanoparticles as colorimetric sensor","authors":"A. Koushalya, K. Anitha","doi":"10.1016/j.optmat.2024.116330","DOIUrl":null,"url":null,"abstract":"<div><div>Polyvinylpyrrolidone (PVP)-stabilized silver nanoparticles (PVP–Ag) are utilized for the detection of Hg<sup>2+</sup> and Cr<sup>3+</sup> ions by varying the diluting solvents, which alters the material's local surface plasmon resonance (LSPR) absorption band, forming yellow and colorless nanoparticles. Yellow PVP-Ag nanoparticles exhibit an absorption peak at 410 nm. This probe interacts with the Hg<sup>2+</sup> ions, as a result, the intensity of the absorption peak drops, and the color changes noticeably from yellow to colorless. The colorless transparent PVP-Ag exhibits no absorption peak; however, adding Cr<sup>3+</sup> ions causes a peak at 440 nm, thus producing a yellow color after the interaction. The TEM, DLS, and FTIR results show the interaction of materials with Hg<sup>2+</sup> and Cr<sup>3+</sup>, which results in the change of inter-particle distance, leading to the detection of Hg<sup>2+</sup> and Cr<sup>3+</sup>. The limits of detection (LOD) for Hg<sup>2+</sup> and Cr<sup>3+</sup> were determined to be 2.2 nM and 50.9 nM, respectively.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116330"},"PeriodicalIF":3.8000,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925346724015131","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Polyvinylpyrrolidone (PVP)-stabilized silver nanoparticles (PVP–Ag) are utilized for the detection of Hg2+ and Cr3+ ions by varying the diluting solvents, which alters the material's local surface plasmon resonance (LSPR) absorption band, forming yellow and colorless nanoparticles. Yellow PVP-Ag nanoparticles exhibit an absorption peak at 410 nm. This probe interacts with the Hg2+ ions, as a result, the intensity of the absorption peak drops, and the color changes noticeably from yellow to colorless. The colorless transparent PVP-Ag exhibits no absorption peak; however, adding Cr3+ ions causes a peak at 440 nm, thus producing a yellow color after the interaction. The TEM, DLS, and FTIR results show the interaction of materials with Hg2+ and Cr3+, which results in the change of inter-particle distance, leading to the detection of Hg2+ and Cr3+. The limits of detection (LOD) for Hg2+ and Cr3+ were determined to be 2.2 nM and 50.9 nM, respectively.
期刊介绍:
Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials.
OPTICAL MATERIALS focuses on:
• Optical Properties of Material Systems;
• The Materials Aspects of Optical Phenomena;
• The Materials Aspects of Devices and Applications.
Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.