Synthesis of crystalline and amorphous, particle-agglomerated 3-D nanostructures of Al and Si oxides by femtosecond laser and the prediction of these particle sizes
| Autor: | Krishnan Venkatakrishnan, Bo Tan, Mugunthan Sivayoganathan |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
81.16.-c methods of micro- and nanofabrication and processing
Materials science Characterization 81 Materials science Oxide Nanochemistry Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Synthesis chemistry.chemical_compound Materials Science(all) Plume properties General Materials Science Ceramic Agglomerated particle size 81.07.-b nanoscale materials and structures: fabrication and characterization 3-D nanostructures Nano Express Crystalline 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Amorphous solid Chemical engineering chemistry visual_art Al and Si oxides Amorphous Femtosecond visual_art.visual_art_medium Particle Particle size Prediction 0210 nano-technology |
| Zdroj: | Nanoscale Research Letters |
| ISSN: | 1556-276X |
| DOI: | 10.1186/1556-276x-7-619 |
| Popis: | We report a single step technique of synthesizing particle-agglomerated, amorphous 3-D nanostructures of Al and Si oxides on powder-fused aluminosilicate ceramic plates and a simple novel method of wafer-foil ablation to fabricate crystalline nanostructures of Al and Si oxides at ambient conditions. We also propose a particle size prediction mechanism to regulate the size of vapor-condensed agglomerated nanoparticles in these structures. Size characterization studies performed on the agglomerated nanoparticles of fabricated 3-D structures showed that the size distributions vary with the fluence-to-threshold ratio. The variation in laser parameters leads to varying plume temperature, pressure, amount of supersaturation, nucleation rate, and the growth rate of particles in the plume. The novel wafer-foil ablation technique could promote the possibilities of fabricating oxide nanostructures with varying Al/Si ratio, and the crystallinity of these structures enhances possible applications. The fabricated nanostructures of Al and Si oxides could have great potentials to be used in the fabrication of low power-consuming complementary metal-oxide-semiconductor circuits and in Mn catalysts to enhance the efficiency of oxidation on ethylbenzene to acetophenone in the super-critical carbon dioxide. |
| Databáze: | OpenAIRE |
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