Surface activity and effects as measured by contact angle
MetadataShow full item record
Studies of measurement of contact angles of liquids on solids have great technical importance particularly in the semiconductor, textile, cosmetic and pharmaceutical industries. Contact angle measurements are simple, highly efficient tools for obtaining insight into the properties and interactions of a surface. In this project, the thermodynamics of surface energy calculations is studied based on surface contact angles formed using specific test liquids. A home-made setup is built for contact angle and surface energy analysis. A dedicated software code written in MATLAB® enables computation of the contact angle of sessile droplets accurately, along with other defining parameters like Zisman's critical wetting tension (Z-CWT) and surface energy parameters (dispersive, acidic and basic). Applications of such techniques on supercritical CO2 processed nanoporous low-k dielectrics as well as bonding in PDMS are studied in detail. Furthermore, advancing and receding angle measurement techniques along with roughness studies are done with a view to improve system usability.