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

Abstract

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.

Aluminum Based Nanosensors for Ultrasensitive Bio-Detection

“…The commonly used methods to fabricate are wet-chemical synthesis [7], lithography techniques [3][9], mechanical attrition [7], vapour condensation [15], self assembled thin films [16], [17] and pulsed laser ablation in the nanosecond range under various media [18]. The lithographic techniques have several types namely, electron beam lithography, colloidal lithography, interference lithography and nanoimprint lithography.…”

Aluminum Based Nanosensors for Ultrasensitive Bio-Detection

“…The commonly used methods to fabricate are wet-chemical synthesis [7], lithography techniques [3][9], mechanical attrition [7], vapour condensation [15], self assembled thin films [16], [17] and pulsed laser ablation in the nanosecond range under various media [18]. The lithographic techniques have several types namely, electron beam lithography, colloidal lithography, interference lithography and nanoimprint lithography.…”