Author : Raja Shahbaz Ahmed, Dr. M. Moazam Baloch and Mudassir Ali Memon

Superhydrophobic surfaces having water contact angle greater than 150° are very interesting and can be very useful for applications such as anti-fouling, de-icing, anti-corrosion, water proofing and anti-fog in many use cases such as transport, daily uses around homes. hydrophobic surfaces which are present naturally fascinated scientists and engineers for many years, researchers found out that the hydrophobicity can be replicated by having micro or nano surface roughness, the problem then for many years was that it was not cost effective to achieve superhydrophobic surfaces. Present study focuses on a cost effective method for achieving superhydrophobic surfaces using SiO2 nano particles which are extracted from agricultural waste i-e Rice Husk, the contact angle was calculated using photos taken with a smartphone and using image analysis software, average static contact angles of water drops were found to be in the range of 151°

Keywords: Superhydrophobic, Nano surface roughness, Rice Husk, SiO2