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Eco-friendly 'pre-fab nanoparticles' could revolutionize nano manufacturing
Date:8/13/2014

carbon footprint a lot."

Doctoral student and first author Tim Gehan says that organic solar cells made in this way can be semi-transparent, as well, "so you could replace tinted windows in a skyscraper and have them all producing electricity during the day when it's needed. And processing is much cheaper and cleaner with our cells than in traditional methods."

Venkataraman credits organic materials chemist Gehan, with postdoctoral fellow and device physicist Monojit Bag, with making "crucial observations" and using "persistent detective work" to get past various roadblocks in the experiments. "These two were outstanding in helping this story move ahead," he notes. For their part, Gehan and Bag say they got critical help from the Amherst Fire Department, which loaned them an infrared camera to pinpoint some problem hot spots on a device.

It was Bag who put similar sized and charged nanoparticles together to form a building block, then used an artist's airbrush to spray layers of electrical circuits atop each other to create a solar-powered device. He says, "Here we pre-formed structures at nanoscale so they will form a known structure assembled at the meso scale, from which you can make a device. Before, you just hoped your two components in solution would form the right mesostructure, but with this technique we can direct it to that end."


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Contact: Janet Lathrop
jlathrop@admin.umass.edu
413-545-0444
University of Massachusetts at Amherst
Source:Eurekalert  

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