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Synthesis of Very Thin 1D and 2D CdWO 4 Nanoparticles with Improved Fluorescence Behavior by Polymer‐Controlled Crystallization
Author(s) -
Yu ShuHong,
Antonietti Markus,
Cölfen Helmut,
Giersig Michael
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020703)41:13<2356::aid-anie2356>3.0.co;2-u
Subject(s) - nanorod , crystallization , hydrothermal circulation , copolymer , materials science , polymer , nanocrystal , fluorescence , aqueous solution , chemical engineering , nanoparticle , nanotechnology , chemistry , physics , optics , composite material , engineering
With double jets to nanobelts : Well‐defined very thin CdWO 4 nanorods/nanobelts can be easily synthesized by double‐jet crystallization in aqueous solution at room temperature in the absence of a polymeric crystallization modifier (see picture, left). Further hydrothermal ripening leads to the self‐assembly of the nanorods/nanobelts into raftlike bundles, whereas very thin 2D sheetlike nanocrystals (see picture, right) and 1D nanorods with diameter 2.5 nm are obtained in the presence of double‐hydrophilic block copolymers. Both the 1D and 2D polymer‐modified species show highly increased fluorescence efficiency.