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Negative Phototaxis Behaviour of Organic Droplets in Channels

Authors: 

Larisa Florea, Klaudia Wagner, Pawel Wagner, Gordon W. Wallace, David L. Officer, Fernando Benito-Lopez, Dermot Diamond

Publication Type: 
Refereed Conference Meeting Proceeding
Abstract: 
Along the evolutionary path from single cells to multicellular organisms with a central nervous system, there are species of intermediate complexity that possess many autonomous cells programmed to respond to environmental stimuli. One of the more striking responses is phototaxis[1], in which motile organisms adjust their locomotory path according to the incident light in a finely controlled manner, either towards or against the light source (positive or negative phototaxis). Inspired by them we developed an inanimate/chemical system in which an organic droplet is self-propelled in response to a photo-stimulus. The centimetre-scale directional movement of the organic droplet on the aqueous solution is powered by the combination of photo-induced pH change and surface tension effects.
Conference Name: 
The 17th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS)
Proceedings: 
The 17th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS)
Digital Object Identifer (DOI): 
10.NA
Publication Date: 
27/10/2013
Conference Location: 
Germany
Research Group: 
Institution: 
Dublin City University (DCU)
Open access repository: 
Yes