The laboratory synthesizes silica nanoparticles and composite materials with various sizes, compositions, and functional applications. The surfaces of these nanoparticles are coated using methods such as cold spraying and dipping. These surfaces are then activated using oxygen plasma and rendered hydrophobic through the deposition of silane polymers using chemical vapor deposition (CVD) technology.
Surface Wettability Characterization
The fabricated surfaces are tested for their liquid-repelling ability using an optical contact angle measurement device. We measure the contact angles of water and oils on the surfaces in static, dynamic, and transitional states. The coating is adjusted to ensure optimal liquid repellency, and the stability and durability of the coated surfaces are also evaluated.
Nonlinear Thermo-Optical Properties
A Z-scan device is used to study the nonlinear thermal response of the synthesized nanoparticles, which are stimulated by a continuous laser system. The nonlinear optical constants of the nanoparticles are determined, covering a range of chemical compositions, core-shell sizes, and structures throughout the process. The report outlines the nonlinear mechanism governing these nanoparticles.
These studies are driven by the practical applications of the fabricated systems, including surface material enhancement, the development of responsive materials, saturation absorber applications, and drug delivery uses.