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Vapor–Solid Growth of Molybdenum Oxide Nanowhiskers: Wettability Studies and Growth Process

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MoO2 coatings were grown on silicon substrates using vapor–solid mechanism at different filament temperatures, durations and oxygen flow rates. The coating deposited at a filament temperature of 1500 °C with oxygen flow rate in the range of 4–8 sccm exhibited nanowhisker microstructure. The wettability studies indicated that the as-prepared MoO2 coating is hydrophilic in nature whereas, MoO2 coating treated with silane showed a high contact angle of 156°. The nanoscale protrusions combined with low surface free energy silane coating resulted in superhydrophobicity. The growth sequence of MoO2 nanowhiskers was studied in detail using field emission scanning electron microscopy. X-ray photoelectron spectroscopy and micro-Raman spectroscopy studies confirmed the presence of MoO2 in the as-deposited coating. The changes in the structures of the MoO2 coatings with respect to the growth conditions were studied using X-ray diffraction.
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Keywords: MOLYBDENUM OXIDE; NANOWHISKERS; PERFLUOROOCTYL SILANE; SUPERHYDROPHOBICITY; VAPOR–SOLID MECHANISM; WETTABILITY

Document Type: Research Article

Publication date: August 1, 2013

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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