Synthesis of atomically thin WO3 sheets from hydrated tungsten trioxide

Kalantar Zadeh, K, Vijayaraghavan, A, Ham, M, Zheng, H, Breedon, M and Strano, M 2010, 'Synthesis of atomically thin WO3 sheets from hydrated tungsten trioxide', Chemistry of Materials, vol. 22, pp. 5660-5666.


Document type: Journal Article
Collection: Journal Articles

Title Synthesis of atomically thin WO3 sheets from hydrated tungsten trioxide
Author(s) Kalantar Zadeh, K
Vijayaraghavan, A
Ham, M
Zheng, H
Breedon, M
Strano, M
Year 2010
Journal name Chemistry of Materials
Volume number 22
Start page 5660
End page 5666
Total pages 7
Publisher American Chemical Society
Abstract Atomically thin WO3 is fabricated using a three-step process, involving wet-chemical synthesis of hydrated-WO3, mechanical exfoliation of fundamental layers and dehydration by annealing at 300 ºC. Atomic force microscopy reveals that the minimum resolvable thickness of the hydrated flakes to be ~1.4 nm, which corresponds to the unit-cell height. The subsequent annealing temperature determines the degree of dehydration and thereby the crystallographic structure of the resultant WO3. The hydrated and dehydrated flakes are characterized by Raman spectroscopy to reveal spectroscopic fingerprints of flake thickness. Thin flakes are also shown to have higher propensity for lithium intercalation, which is also evidenced in Raman planar peak intensity.
Keyword(s) Annealing temperatures
Crystallographic structure
Lithium Intercalation
Mechanical exfoliation
Peak intensity
Spectroscopic fingerprints
Three-step process
Tungsten trioxide
Unit cells
Wet chemical synthesis
DOI - identifier 10.1021/cm1019603
Copyright notice © 2010 American Chemical Society
ISSN 0897-4756
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