LONDON -- Physicists at the University of Luxembourg have developed a new method to improve the electrical conductivity of polymeric composites which can be used to make flat-panel displays and solar cells more efficient.
The researchers in Luxembourg, in cooperation with scientists from the Netherlands, have studied the electrical percolation of carbon nanotubes in a polymer matrix and shown the percolation threshold - the point at which the polymer composite becomes conductive - can be considerably lowered if small quantities of a conductive polymer latex are added. The simulations were done in Luxembourg, while the experiments took place at Eindhoven University.
"In this project, the idea is to use as little as possible carbon nanotubes and still benefit from their favourable properties", explained the project leader at the University of Luxembourg, Prof. Tania Schilling, "we have discovered that, by adding a second component, we could make use of the resulting interactions to reach our goal." By mixing colloidal particles of differing shapes and sizes in the medium, system-spanning networks form which is the prerequisite for electrically conductive composites.
The recent finding of the materials scientists of the University of Luxembourg was published in the peer-reviewed, scientific journal ‘Nature Nanotechnology’. This finding is a result of a cooperation of scientists at the University of Luxembourg, the Technische Universiteit Eindhoven and the Dutch Polymer Institute. This article first appeared in EE Times Europe.
Thanks EE Times for the interesting topic. Controlling the electrical percolation threshold can also be done biologically by "binding of antigens to the antibodies, disrupt the network continuity causing increased resistance of the network," here is the link:
What would be neat (either in biologic or non-biologic versions) is to further control the conductivity dynamically either thru voltage or temperature bias.
Peter, programs for 2011 and 2012 have been posted (www.cmoset.com). We would be delighted if you can come to Whistler in 2011 or Vancouver in 2012, I will arrange registration waiver ($500 value)...Kris
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.