Anti-reflective Films Ultrasonic Spray

Anti-reflective Films Ultrasonic Spray. Uniform anti-reflective films fabricated by layer-by-layer ultrasonic spray method

Herein, a layer-by-layer ultrasonic spray method was developed and used to successfully fabricate anti-reflective multilayer thin films. For the chemical and physical deposition of the anti-reflective thin film, layers of poly(diallyldimethylammonium chloride) and SiO2 nanoparticles were alternately deposited, producing a film that exhibited a uniform surface, low roughness, and high transmittance.

The average thickness of each bilayer was determined as 10–15 nm, and the refractive index was n=1.28 at a wavelength of 628 nm, while exhibiting a 99% transmittance in the visible range. This layer-by-layer method using the ultrasonic spray technique is effective in controlling film characteristics such as structure, transmittance, refractive index, roughness, and film thickness. The ultrasonic spray layer-by-layer technique can be valuable for the medical industry and biomedical fields, which require uniformity in and precise control of thin films.