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Category: sustainability – Page 598

Hold onto your butts solar aficionados, the next generation solar roof is coming, and it looks good. During a brief event Friday night, Elon Musk presented his plan to integrate solar roofs with Powerwall power packs. But that’s not all. On Saturday Musk expanded on his talk by explaining via Twitter that the new solar tiles would come with some pretty sweet features — more specifically, built-in defrosters.

Unlike the solar systems of the past, Tesla’s newly designed roofs will feature aesthetically pleasing, energy efficient glass solar tiles, that will replace a home’s roof rather than sit on top of it.

Harsh weather conditions — like snow and ice — are known for wreaking havoc on traditional asphalt shingles, but that’s not the case with Musk’s new design. The solar glass tiles are not only more durable, but are also packing specialized heating elements that work much like the rear defroster does on your car.

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Your Tesla can drive itself. Not just on the highway, not under strict guidance, but everywhere. Or at least, it will have all the necessary gadgets to do so soon.

We are excited to announce that, as of today, all Tesla vehicles produced in our factory – including Model 3 – will have the hardware needed for full self-driving capability at a safety level substantially greater than that of a human driver.

– Tesla Blog

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Researchers at the Indian Institute of Science Education and Research (IISER) in Kolkata, India, have for the first time implemented a bio-waste-derived electrode as cathode in a quantum-dot-sensitized solar cell.

“The materials to be used as cathode in quantum dot solar cells need to be highly catalytic and electrically conducting to facilitate the electron transfer processes,” explains Professor Sayan Bhattacharyya from the Department of Chemical Sciences at IISER. He adds that the lamellar structure of human hair is likely responsible for the graphene-like sheets in the transformed graphitic porous carbon. “Secondly,” he continues, “since hair contains keratin and other amino acids, carbonizing the acid-digested hair under inert conditions likely retains the nitrogen and sulphur hetero-atoms, which are useful to enhance the catalytic propensity of the produced carbon.”

As the professor explains, the idea behind this research project was to use a bio-waste resource like hair in future energy technologies to achieve a win-win situation — i.e., “A smart way to address environmental concerns and also to produce cheaper devices.”

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Patches of chain-like molecules placed across nanoscale particles can radically transform the optical, electronic, and magnetic properties of particle-based materials. Understanding why depends critically on the three-dimensional features of these “polymer nano-patches”—which are tantalizingly difficult to reveal at a scale spanning just billionths of a meter.

Now, scientists have used cutting-edge electron tomography techniques—a process of 3D reconstructive imaging —to pinpoint the structure and composition of the polymer nano-patches. The results, published earlier this month in the journal Nature, “lay the foundation for new nanoscale architectures that could potentially enhance technologies such as self-assembled solar cells and catalysts,” said lead author Eugenia Kumacheva of the University of Toronto.

The scientists tracked the patches formed by different synthetic polymers—versatile and common compounds used in everything from plastics to electronics —on the surface of gold nanospheres thousands of times smaller than the width of a single human hair. To visualize the elusive surface structures, Kumacheva and her team turned to cutting-edge facilities at the Center for Functional Nanomaterials (CFN), a U.S. Department of Energy (DOE) Office of Science User Facility at DOE’s Brookhaven National Laboratory.

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