Obținerea straturilor poroase de oxid de galiu prin tratamentul termic al straturilor poroase de GaP obținute în urma anodizării

Research Methodology

The transition from Gallium Phosphide (GaP) to Gallium Oxide ($\text{Ga}_2\text{O}_3$) is a delicate process that requires precise control over the thermal environment to preserve the porous architecture.

Optimization Process:

• Controlled Morphology: The initial porous structure of GaP, created via anodization, serves as a template for the resulting oxide.
• Crack Mitigation: By fine-tuning the heating rates and peak temperatures, the internal stress within the oxide layer was minimized, preventing the formation of macro-scale cracks.
• Chemical Consistency: EDS (Energy Dispersive Spectroscopy) was likely used to confirm the transition from phosphide to oxide throughout the layer’s depth.

Key Results:

1. Substrate Integration: Successfully maintained a high-quality interface between the porous oxide and the bulk GaP substrate.
2. Electrical Conductivity: The resulting layers retained favorable electrical properties, essential for sensor and optoelectronic applications.
3. Porous Network: The high surface-to-volume ratio of the porous $\text{Ga}_2\text{O}_3$ makes it an ideal candidate for gas sensing and photocatalysis.

Scientific Context

This work established the baseline for future experiments in wide-bandgap oxide synthesis at UTM, demonstrating the potential of thermal treatment as a reliable tool for material phase transformation.