Journal
LANGMUIR
Volume 30, Issue 34, Pages 10487-10492Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la5025907
Keywords
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Funding
- FP7-PEOPLE-IRSES [247544]
- Capes
- CNPq
- FAPESP
- ANR P3N Project nanoPDT [ANR-09-NANO-027]
- Swedish Research Council (VR)
- Knut and Alice Wallenberg (KAW) Foundation
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WO3 nanorods and wires were obtained via hydrothermal synthesis using sodium tungstate as a precursor and either oxalic acid, citric acid, or poly(methacrylic add) as a stabilizing agent. Transmission electron microscopy images showed that the organic acids with different numbers of carboxylic groups per molecule influence the final sizes and stacking nanostructures of WO3 wires. Three-dimensional electron diffraction tomography of a single nanocrystal revealed a hexagonal WO3 structure with preferential growth along the c-axis, which was confirmed by high-resolution transmission electron microscopy. WO3 nanowires were also spin-coated onto an indium tin oxide/glass conducting substrate, resulting in the formation of a film that was characterized by scanning electron microscopy. Finally, cyclic voltammetry measurements performed on the WO3 thin film showed voltammograms typical for the WO3 redox process.
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