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Surface-Initiated Atom Transfer Radical Polymerization Induced Transformation of Selenium Nanowires into Copper Selenide@Polystyrene Core-Shell Nanowires

Resource type
Date created
2013-09-02
Authors/Contributors
Abstract
This Article reports the first preparation of cuprous and cupric selenide nanowires coated with a ∼5 nm thick sheath of polystyrene (copper selenide@polystyrene). These hybrid nanostructures are prepared by the transformation of selenium nanowires in a one-pot reaction, which is performed under ambient conditions. The composition, purity, and crystallinity of the copper selenide@polystyrene products were assessed by scanning transmission electron microscopy, electron energy-loss spectroscopy, X-ray powder diffraction, and X-ray photoelectron spectroscopy techniques. We determined that the single crystalline selenium nanowires are converted into polycrystalline copper selenide@polystyrene nanowires containing both cuprous selenide and cupric selenide. The product is purified through the selective removal of residual, non-transformed selenium nanowires by performing thermal evaporation below the decomposition temperature of these copper selenides. Powder X-ray diffraction of the purified copper selenide nanowires@polystyrene identified the presence of hexagonal, cubic, and orthorhombic phases of copper selenide. These purified cuprous and cupric selenide@polystyrene nanowires have an indirect bandgap of 1.44 eV, as determined by UV–vis absorption spectroscopy. This new synthesis of polymer-encapsulated nanoscale materials may provide a method for preparing other complex hybrid nanostructures.
Document
Published as
"Template Assisted Preparation of High Surface Area Macroporous Supports with Uniform and Tunable Nanocrystal Loadings," Paul, M. T. Y.; Yee, B. B.; Zhang, X.; Alford, E. H.; Pilapil, B. K.; Gates, B. D., Nanoscale, 2019, 11, 1937-1948. DOI: 10.1021/am4023785.
Publication title
Nanoscale
Document title
Template Assisted Preparation of High Surface Area Macroporous Supports with Uniform and Tunable Nanocrystal Loadings
Date
2019
Volume
2019
Issue
11
First page
1937
Last page
1948
Publisher DOI
10.1021/am4023785.
Copyright statement
Copyright is held by the author(s).
Scholarly level
Peer reviewed?
Yes
Language
English
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