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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium 2016 Functional Nanomaterials: Emerging Nanomaterials and Techniques for 3D Architectures
Presentation Title Morphological, Structural and Optical Characterization of Bottom up Growth of Ag-WO3 Core Shell Nano-cube Heterostructures
Author(s) Muhammad A Imam, William Benton, Nitin Chopra
On-Site Speaker (Planned) Muhammad A Imam
Abstract Scope Physical vapor deposition was used to produce WO3 based nano heterostructures. Wet toxic chemical process was avoided to make the process simple and contaminant free. Sputtering of WO3 and subsequent thermal annealing process was done to create nano-cubes of WO3. After that, sputtering of Ag was performed to create the Ag-WO3 core shell nano heterostructures (CSNH). The CSNHs were characterized using field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), X-ray diffraction analysis (XRD) and UV-vis spectroscopy. The morphologies, elemental analysis, interfaces, crystallinity, phases, and chemical compositions were analyzed. Bottom up growth of WO3 nano cubes was studied using different time periods at 900C. Ag coating was also studied before and after annealing. Finally, optical property (band gap) was also analyzed using Tauc plot derive from absorption spectra. The tailoring the band gap of WO3 from ~2.9eV to ~ 2.45 eV was observed while Ag-WO3 CSNH formed.
Proceedings Inclusion? Undecided


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