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Displaying 1 - 8 of 8 stories.
March 1, 2013
Making graphene oxide in ‘a microwave’
Microwave irradiation of graphite has been shown to produce graphene oxide with 90% yield by the research group of professor Yuta Nishina, Research Core for...
http://www.che.com/chementator/electronics_chemicals/Making-graphene-oxide-in-a-microwave_10242.html
March 1, 2013
Making cork-like monoliths from graphene
A team from Monash University (Melbourne, Australia; www.monash.edu.au) has prepared graphene monoliths with a cork-like hierarchical structure, exhibiting ultra-low density, superelasticity, good electrical conductivity and high efficiency of energy absorption. The ability to maintain structural integrity upon large deformation is important for many emerging applications, such as flexible electronic...
http://www.che.com/chementator/electronics_chemicals/Making-cork-like-monoliths-from-graphene_10248.html
March 1, 2013
A continuous process to make graphene
An inexpensive and scalable process that uses supercritical (SC) liquids to make large quantities of graphene is being developed by the group of professor Itaru Honma at the Institute of Multidisciplinary Research for Advanced Materials, Tohoku University (Sendai; db.tagen.tohoku.ac.jp), in collaboration with Showa...
http://www.che.com/chementator/electronics_chemicals/A-continuous-process-to-make-graphene_10264.html
May 1, 2012
New polysilicon granule-drying system boosts processing yields and purity
A novel cold-dry process makes possible the utilization of fine form-factor silicon, such as granules and sand-like fines, in the production of high-purity polysilicon for solar photovoltaic cells and semiconductors, where such fine-grained material would normally have to be sent back up the supply chain rather than into the crucible. The patent-pending drying system, known as FlashDry, was developed by...
http://www.che.com/chementator/electronics_chemicals/New-polysilicon-granule-drying-system-boosts-processing-yields-and-purity_9298.html
March 1, 2012
A fine filter
Last month, W. L. Gore & Associates (Gore; Elkton, Md.; www.gore.com) introduced what is claimed to be the worlds first 20-nm-rated polytetrafluoroethylene (PTFE) filter that is available in a...
http://www.che.com/chementator/electronics_chemicals/A-fine-filter_9041.html
November 1, 2011
A polarizable membrane for improved energy storage
The two basic energy-storage devices — dielectric and double-layer capacitors — entail serious limitations. Dielectric capacitors have low capacitance, on the order of 0.1 to 1.0 µF/cm2, while the double-layer capacitor has a high capacitance, on the order of 0.5 to 5.0 F/cm2, but suffers from difficulties in scaling up and high fabrication costs. Now researchers from the National...
http://www.che.com/chementator/electronics_chemicals/A-polarizable-membrane-for-improved-energy-storage_8623.html
September 1, 2011
A promising method for producing conductive graphene sheets
Since the isolation of graphene by the “Scotch tape” method, many researchers have tried to synthesize solution-dispersible graphene. The challenge has been to develop a high-yield method that can exfoliate graphite efficiently into solution-dispersible graphene sheets without collateral damage to the graphene due to oxidation, or due to the use of a strong acid. A nonoxidative electrochemical...
http://www.che.com/chementator/electronics_chemicals/A-promising-method-for-producing-conductive-graphene-sheets_8407.html
July 1, 2011
Magnetic-shape-memory alloy offers alternative to traditional actuators
A novel nickel-manganese-gallium alloy, introduced by Goodfellow Corp. (Oakdale, Pa.; www.goodfellowusa.com), elongates in a magnetic field, allowing the conversion of magnetic field energy into kinetic energy. The material offers an alternative to conventional actuators, and could find other uses in energy harvesting systems, breaker switches, sensors and others. Grown as a single crystal using a modified...
http://www.che.com/chementator/electronics_chemicals/Magnetic-shape-memory-alloy-offers-alternative-to-traditional-actuators_8213.html

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