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Archive for the ‘materials’ category: Page 117

Aug 17, 2014

A graphene replacement made from plastic

Posted by in category: materials

Kurzweil AI

A team of Korean researchers has synthesized hexagonal carbon nanosheets similar to graphene, using a polymer. The new material is free of the defects and complexity involved in producing graphene, and can substitute for graphene as transparent electrodes for organic solar cells and in semiconductor chips, the researchers say.

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Aug 16, 2014

Professor of Chemistry Turns India’s Plastic Trash into Useable Roadways

Posted by in categories: chemistry, innovation, materials

Christina Sarich — Nation of Change
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Scenes from the movie Slumdog Millionaire accurately depict India’s latest consumer-influenced economy. Tree groves are littered with a rainbow color of plastic bags like some kind of ominous carnival wreckage. Plastic bottles, candy wrappers, and other ‘garbage’ liters the streets in a land where city officials have long forsaken their duties of providing a pristine infrastructure to its inhabitants, but a professor of chemistry in Madurai, India thinks that the trash lining his country’s roads and fields could be utilized as a ‘wonderful resource,” transforming common plastic liter, from thicker acrylics to bottles and grocery bags, into a substitute for bitumen in asphalt.

The ‘Plastic Man,’ as Rajagopalan Vasudevan is known in India, travels throughout the country instructing engineers how to apply his technology to recycle the trash copiously littering streets from Punjab to Tamil Nadu. To date, more than 3000 miles of plastic roads have been laid in at least 11 states.

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Aug 2, 2014

A transistor material intended to replace silicon by 2024

Posted by in categories: engineering, materials

Kuzweil AI

USC Viterbi School of Engineering researchers have developed a flexible, transparent, energy-efficient, lower-cost hybrid design that could replace silicon as the traditional transistor material used in electronic chips.

The new design, described in a paper recently published in Nature Communications, combines carbon nanotube thin-film transistors with thin-film transistors comprised of indium, gallium and zinc oxide (IGZO).

Electrical engineering professor Dr. Chongwu Zhou and USC Viterbi graduate students Haitian Chen, Yu Cao, and Jialu Zhang developed this energy-efficient circuit by integrating carbon nanotube (CNT) thin film transistors (TFT)

The inclusion of IGZO thin film transistors was necessary to provide power efficiency to increase battery life. If only carbon nanotubes had been used, the circuits would not be power-efficient.

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