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Crystallite size induced bandgap tuning in WO3 derived from nanocrystalline tungsten
Shaik Adil
Published in Acta Materialia Inc
2020
Volume: 176
   
Pages: 47 - 52
Abstract
In this work, nanocrystalline tungsten oxide (WO3) powder was obtained by high energy ball milling (HEBM) followed by heat treatment of tungsten (W) powder. HEBM significantly influenced the oxidation behavior by reducing the crystallite size and inducing lattice strain in W powder. The resultant nanocrystalline WO3 shows variation in the optical bandgap with respect to the bulk counterparts. The alteration in the bandgap of WO3 is ascribed to the changes in crystallite size and the unit cell volume. In the end, a thorough correlation between fundamental interactions of these changes was succinctly highlighted. © 2019 Acta Materialia Inc.
About the journal
JournalScripta Materialia
PublisherActa Materialia Inc
ISSN13596462
Open AccessNo
Concepts (19)
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    Ball milling
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    Chromium compounds
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    Energy gap
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    Mechanical alloying
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    Milling (machining)
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    Nanocrystalline materials
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    Nanocrystalline powders
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    Nanocrystals
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    Tungsten compounds
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    X ray diffraction
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    BAND-GAP TUNING
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    BULK COUNTERPART
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    CRYSTALLINE OXIDES
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    HIGH-ENERGY BALL MILLING
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    MECHANICAL MILLING
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    Nanocrystallines
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    Oxidation behaviors
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    UNIT-CELL VOLUME
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    Crystallite size