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Title:Cleansing for Life
Author(s):Hoque, Muhammad Jahidul
Contributor(s):Yan, Xiao
Subject(s):Fruit Flies
Surface Science
Abstract:If you have been seeing small flies or gnats in your kitchen, they're probably fruit flies. Fruit flies are primarily nuisance pests and have the potential to contaminate food with bacteria and other disease-producing organisms. However, fruit flies itself have extreme self-cleaning and bactericidal behavior; good news for the surface science! Their body parts, especially the wings have a unique combination of micro/nano-architecture and surface chemistry that cause extreme water repellency (superhydrophobicity), which prevents wings contamination with debris and microorganisms by enabling good self-cleaning activity in dusty and humid environment. In order to study this phenomena, we developed a dual dust-droplet dispensing and visualization system. A coal particle (~500µm length) resembling a dust on the wing surface, jumps off the surface by converting the surface free energy into kinetic energy when coalesced with a microscopic water droplet (~140µm radius). The chronophotograph demonstrates the previously unidentified single droplet jumping that occurs during the coalescence of a water droplet with a coal/dust particle.
Issue Date:2021
Description:Dr. Nenad Miljkovic
Rights Information:Copyright 2021 Muhammad Jahidul Hoque
Date Available in IDEALS:2021-04-12

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