February 21, 2017,
Technology/Electronics, Chemistry/Nanotechnology
![We report the exfoliation of graphite in aqueous solutions under high shear rate [∼ 108 s–1] turbulent flow conditions, with a 100% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L using carboxymethylcellulose sodium salt to formulate conductive printable inks. The sheet resistance of blade coated films is below ∼2Ω/□. This is a simple and scalable production route for conductive inks for large-area printing in flexible electronics.](https://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/0/ancac3.ahead-of-print/acsnano.6b07735/20170220/images/medium/nn-2016-07735d_0014.gif)
We report the exfoliation of graphite in aqueous solutions under high shear rate [∼ 108 s–1] turbulent flow conditions, with a 100% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L using carboxymethylcellulose sodium salt to formulate conductive printable inks. The sheet resistance of blade coated films is below ∼2Ω/□. This is a simple and scalable production route for conductive inks for large-area printing in flexible electronics.
February 20, 2017,
Physics, Technology/Electronics, Chemistry/Nanotechnology
Predictive materials discovery framework.
A novel workflow combining machine learning and density functional theory calculations has been developed by Northwestern Engineering and Los Alamos National Laboratory to create design guidelines for new materials that exhibit useful electronic properties, such as ferroelectricity and piezoelectricity. Few layered materials have these qualities in certain geometries – crucial for developing solutions to electronics, communication, and energy problems – ie there was very little data from which to formulate the guidelines using traditional research approaches.
“When others look for new materials, typically they look in places where they have a lot of data from similar materials...
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February 20, 2017,
Technology/Electronics, Chemistry/Nanotechnology
1. Simplified electrical grid with energy storage. Inset: Hydronium ion figures
A new type of battery developed by Oregon State University shows promise for sustainable, high-power energy storage. It’s the world’s first battery to use only hydronium ions as the charge carrier. The new battery provides an additional option for researchers, particularly in the area of stationary storage. Stationary storage refers to batteries in a permanent location that store grid power – including power generated from alternative energy sources such as wind turbines or solar cells – for use on a standby or emergency basis.
Hydronium, H3O+, is a positively charged ion produced when a proton is added to a water molecule...
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February 18, 2017,
Physics, Technology/Electronics, Chemistry/Nanotechnology
Lithium-sulfur battery with Mixed Conduction Membrane barrier to stop polysulfide shuttling. Credit: Sri Narayan and Derek Moy
USC researchers may have just found a solution for one of the biggest stumbling blocks to the next wave of rechargeable batteries—small enough for cellphones and powerful enough for cars. In a paper published in the January issue of the Journal of the Electrochemical Society, Sri Narayan and Derek Moy of the USC Loker Hydrocarbon Research Institute outline how they developed an alteration to the lithium-sulfur battery that could make it more than competitive with the industry standard lithium-ion battery.
The lithium-sulfur battery, long thought to be better at energy storage capacity than its more popular lithium-ion counterpart, was hampered by its short cycle ...
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