Category Technology/Electronics

Artificial Materials for more Efficient Electronics

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Scanning transmission electron micrscopy image of superlattice consisting of an alternating sequence of 5 atomic unit cells of neodymium nickelate (blue) and 5 atomic unit cells of samarium nickelate (yellow). © Bernard Mundet / EPFL

The discovery of an unprecedented physical effect in a new artificial material marks a significant milestone in the lengthy process of developing ‘made-to-order’ materials and more energy-efficient electronics.

We are surrounded by electronic devices. Transistors are used to power telephones, computers, televisions, hi-fi systems and game consoles as well as cars, airplanes and the like. Today’s silicon-based electronics, however, consume a substantial and ever-increasing share of the world’s energy.

A number of researchers are exploring the propert...

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This ‘Cold Tube’ can Beat the Summer Heat without relying on Air Conditioning

Exterior of Cold Tube demonstration pavilion. Credit: Lea Ruefenacht

Chilled panels use half the energy of conventional air conditioners and can be used outdoors or indoors. AC’s guzzle power and spew out millions of tons of carbon dioxide daily. They’re also not always good for your health – constant exposure to central A/C can increase risks of recirculating germs and causing breathing problems.

There’s a better alternative, say a team of researchers from the University of British Columbia, Princeton University, the University of California, Berkeley and the Singapore-ETH Centre.

They call it the Cold Tube, and they have shown it works.
“Air conditioners work by cooling down and dehumidifying the air around us – an expensive and not particularly environmentally friendly proposit...

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A Light Bright and Tiny: Scientists build a better Nanoscale LED

A glowing purple bar representing the LED is attached to a green surface by a yellow metal contact.
Credit: B. Nikoobakht, N. Hanacek/NIST
The fin LED pixel design includes the glowing zinc oxide fin (purple), isolating dielectric material (green), and metal contact (yellow atop green). The microscopic fins, which the research team arranged into comb-like arrays, show an increase in brightness of 100 to 1,000 times over conventional submicron-sized LED designs. 

New design overcomes long-standing LED efficiency problem – and can transform into a laser to boot. A new design for light-emitting diodes (LEDs) developed by a team including scientists at the National Institute of Standards and Technology (NIST) may hold the key to overcoming a long-standing limitation in the light sources’ efficiency...

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Quantum Materials quest could benefit from Graphene that buckles

Graphene buckling
Simulated mountain and valley landscape created by buckling in graphene. The bright linked dots are electrons that have slowed down and interact strongly. Image: Yuhang Jiang

Cooled graphene mimics effect of enormous magnetic fields that would benefit electronics. Graphene, an extremely thin two-dimensional layer of the graphite used in pencils, buckles when cooled while attached to a flat surface, resulting in beautiful pucker patterns that could benefit the search for novel quantum materials and superconductors, according to Rutgers-led research in the journal Nature.

Quantum materials host strongly interacting electrons with special properties, such as entangled trajectories, that could provide building blocks for super-fast quantum computers...

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