Category Technology/Electronics

‘Metallic Wood’ has the Strength of Titanium and the Density of Water

A microscopic sample of the researchers’ “metallic wood.” Its porous structure is responsible for its high strength-to-weight ratio, and makes it more akin to natural materials, like wood.

High-performance golf clubs and airplane wings are made out of titanium, which is as strong as steel but about twice as light. These properties depend on the way a metal’s atoms are stacked, but random defects that arise in the manufacturing process mean that these materials are only a fraction as strong as they could theoretically be. An architect, working on the scale of individual atoms, could design and build new materials that have even better strength-to-weight ratios.

In a new study published in Nature Scientific Reports, researchers at the University of Pennsylvania’s School of Enginee...

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Converting Wi-Fi signals to Electricity with new 2D materials

Researchers from MIT and elsewhere have designed the first fully flexible, battery-free “rectenna” – a device that converts energy from Wi-Fi signals into electricity – that could be used to power flexible and wearable electronics, medical devices, and sensors for the “internet of things.”
Credit: Christine Daniloff

Device made from flexible, inexpensive materials could power large-area electronics, wearables, medical devices, and more. Imagine a world where smartphones, laptops, wearables, and other electronics are powered without batteries. Researchers from MIT and elsewhere have taken a step in that direction, with the first fully flexible device that can convert energy from Wi-Fi signals into electricity that could power electronics.

Devices that convert AC electromagnetic wave...

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Self-Assembling Nanomaterial offers pathway to more Efficient, Affordable harnessing of Solar Power

Self-assembling nanomaterial offers pathway to more efficient, affordable harnessing of solar power

In this illustration, DPP and rylene dye molecules come together to create a self-assembled superstructure. Electrons within the structure absorb and become excited by light photons, and then couple with neighboring electrons to share energy and create additional excited electrons that can be harvested to create solar cells. Credit: Andrew Levine

Current methods of harvesting solar charges are expensive and inefficient—with a theoretical efficiency limit of 33%. New nanomaterials developed by researchers at the Advanced Science Research Center (ASRC) at The Graduate Center of The City University of New York (CUNY) could provide a pathway to more efficient and potentially affordable harvesting of solar energy.

The materials, created by scientists with the ASRC’s Nanoscience Initiative...

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‘GO Dough’ makes Graphene easy to Shape and Mold

Highly processable and versatile, GO dough can be readily reshaped by cutting, pinching, molding and carving.
Credit: Jiaxing Huang/Northwestern University

New form of graphene oxide is fun to play with – and solves manufacturing challenges. A Northwestern University team is reshaping the world of graphene – literally. The team has turned graphene oxide (GO) into a soft, moldable and kneadable play dough that can be shaped and reshaped into free-standing, three-dimensional structures.

Called “GO dough,” the product might be fun to play with it, but it’s more than a toy. The malleable material solves several long-standing – and sometimes explosive – problems in the graphene manufacturing industry.

“Currently graphene oxide is stored as dry solids or powders, which are prone to co...

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