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Author Kaviya, S. ♦ Kabila, S. ♦ Jayasree, K. V.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ AQUEOUS SOLUTIONS ♦ BIOSYNTHESIS ♦ CHROMIUM IONS ♦ DETECTION ♦ FLUORESCENCE ♦ INERT ATMOSPHERE ♦ QUANTUM DOTS ♦ REDUCING AGENTS ♦ TEMPERATURE RANGE 0273-0400 K ♦ TEMPERATURE RANGE 0400-1000 K ♦ ZINC OXIDES
Abstract Graphical abstract: Biosynthesized fluorescent ZnO quantum dots are extremely stable and are able to sense up to 2 nM of Cr3+ ions in aqueous solution. - Highlights: • ZnO quantum dotes (QDs) are rapidly synthesized from the bio waste at room temperature. • The capping and reducing agent is from natural source hence biodegradable. • The water soluble fluorescent ZnO quantum dots are highly stable. • The QDs are able to sense 2 nM of Cr{sup 3+} ions in aqueous solution. - Abstract: Synthesis of extremely stable and water soluble quantum dots (QDs) would be smart if the method is rapid and eco-friendly. Here in, we have employed a simple strategy for the preparation of well dispersed, luminescent ZnO quantum dots by using pomegranate peel extract at room temperature. This method excludes the use of strong commercial stabilizing agents, different pH conditions, higher temperature and inert atmosphere during the synthesis. The microscopic study has revealed the ZnO QDs to be of a narrow size with an average size distribution of about 4 nm. The water soluble QDs exhibited a strong emission peak at 490 nm and were stable for twelve months. The emission from ZnO QDs are selectively quenched upon addition of Cr{sup 3+} ions. The interaction between the Cr{sup 3+} and the biomolecules on the exterior of ZnO QDs, enables the system to detect up to 2 nM Cr{sup 3+} ions in aqueous solution.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-11-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 95


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