1. Thin Film Interference of Colloidal Thin Films
- Author
-
Weixiao Cao and Hailin Cong
- Subjects
Materials science ,genetic structures ,Silicon ,Surface Properties ,chemistry.chemical_element ,Substrate (electronics) ,Sensitivity and Specificity ,complex mixtures ,Colloid ,Optics ,Electrochemistry ,Perpendicular ,Polymethyl Methacrylate ,General Materials Science ,Colloids ,Irradiation ,Particle Size ,Thin film ,Spectroscopy ,business.industry ,Membranes, Artificial ,Surfaces and Interfaces ,Colloidal crystal ,Condensed Matter Physics ,Acrylates ,chemistry ,Thin-film interference ,Microscopy, Electron, Scanning ,Polystyrenes ,Optoelectronics ,business - Abstract
A stairlike colloidal crystal thin film composed of poly(styrene-methyl methacrylate-acrylic acid) (P(St-MMA-AA)) monodispersed colloids was fabricated on an inclined silicon substrate. Different bright colors were observed on the various parts of the film with different layers as white light irradiated perpendicularly on it. The relationship between the colors and layers of the film was investigated and discussed according to the principle of thin film interference. On the basis of the phenomenon of thin film interference, a one-layer colloidal film having uniform color was researched and it would display diverse colors before and after swollen by styrene (St). A circular stairlike colloidal film was achieved to mimic the colors of the peacock tail feather.
- Published
- 2004