Project Overview
Layer by layer deposition, or LBL, is a method of applying thin films to various substrates. It typically requires two, oppositely charged aqueous solutions that are applied consecutively with wash steps in between. By layering the two solutions, a film slowly forms on the substrate and is built up to the required thickness.
The application of LBL thin films by spraying is a relatively new method. Existing research has shown promising results , proving its effectiveness as a method for applying LBL thin films. Professor Besser and his team are interested in pursuing spraying as a possible method for applying their LBL thin films. Alternative methods, including their advantages and disadvantages, are discussed in detail below.
Thin film applications include anti-reflective coatings, anti-microbial coatings on contact lenses, thin-film photovoltaics, computer memory, pharmaceuticals and ceramics. Research into thin film PV cells is currently underway in hopes of drastically reducing the cost to manufacture due to lower material and energy costs adherent to current manufacturing techniques. Additionally, precision manufactured optics, such as filters and mirrors, also feature thin film coatings, typically anti-reflective.
For the purposes of this particular project, a small scale unit is to be constructed to aid in the fundamental research of applying thin films via layer by layer deposition. The team is to design and build a unit capable of applying thin films by a spray system to relatively larger sized substrates. As with any research device, modularity is key and will be an important part of the design phase.