Archive for the ‘energy’ category: Page 11

Feb 24, 2023

Physicists give the first law of thermodynamics a makeover

Posted by in categories: energy, physics, space

West Virginia University physicists have made a breakthrough on an age-old limitation of the first law of thermodynamics.

Paul Cassak, professor and associate director of the Center for KINETIC Plasma Physics, and graduate research assistant Hasan Barbhuiya, both in the Department of Physics and Astronomy, are studying how energy gets converted in superheated plasmas in .

Their findings, published in Physical Review Letters, will revamp scientists’ understanding of how plasmas in space and laboratories get heated up, and may have a wide variety of further applications across and other sciences.

Feb 22, 2023

3D printed smart contact lenses for augmented reality in-eye navigation demonstrated

Posted by in categories: 3D printing, augmented reality, energy

Researchers from the Korea Electrotechnology Research Institute (KERI) and the Ulsan National Institute of Science and Technology (UNIST) have created “core technology” for 3D printed smart contact lenses building on low-power monochrome displays and demonstrated its functionalities for augmented reality tools such as live navigation. The team’s research has been published in Advanced Science.

“Our achievement is a development of 3D printing technology that can print functional micro-patterns on a non-(planar) substrate that can commercialize advanced smart contact lenses to implement AR (Augmented Reality),” said Seol Seung-Kwon, Ph.D., of the team’s work. “It will greatly contribute to the miniaturization and versatility of AR devices.”

Feb 22, 2023

‘Metasurfaces’ could spark next generation of significantly thinner and cheaper flat screens

Posted by in categories: energy, nanotechnology

Researchers have developed a proof of concept technology that could pave the way for next-generation displays beyond current LCDs and LEDs, enabling screens and electronic devices to become thinner, offer higher resolution and be much more energy efficient.

A team at Nottingham Trent University, the Australian National University and the University of New South Wales Canberra in Australia has engineered electrically tunable arrays of nanoparticles called “metasurfaces,” which can offer significant benefits over current liquid crystal displays.

Today’s display market offers a large range of choices, each with its pros and cons. However factors including production costs, lifespan and energy consumption have kept liquid crystal technology the most dominant and popular technology for screens such as TV sets and monitors.

Feb 21, 2023

This startup uses grass to build energy-efficient building panels

Posted by in categories: energy, sustainability

This innovative startup is revolutionizing architecture — with building panels made out of fastest-growing perennial grass on Earth.

With housing shortages in need of quick fixes, the manufacturing industry is facing a conundrum: how to source materials and build structures while cutting down on emissions. The answer lies with sustainable construction — not only could it help reduce our environmental impact, but it also keeps costs low during implementation.

Recently, a new startup named Plantd achieved a milestone of building ultra-strong building panels out of the fastest-growing perennial grass on Earth — the best sustainable alternative to construction.

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Feb 20, 2023

Stretching-insensitive stretchable and biocompatible triboelectric nanogenerators

Posted by in categories: energy, engineering, nanotechnology, wearables

Professor Juhyuk Lee of the Department of Energy Engineering has developed an elastic triboelectric generator that can be used in the daily lives of frequent movers. The cause of the output reduction of the elastic triboelectric sensor was identified during joint research with Professor Joohun Lee of Hanyang University’s (ERICA campus) Department of Bio-Nanotechnology. Additionally, the professor used graphene to develop a touch sensor with stable output and expand the application of the triboelectric generator. The study is published in the journal Nano Energy.

Along with the rapid growth of various biosensors and due to the continuous development of semiconductors and small electronic components, there has been a growing interest in triboelectric generators for use as sensors or . To use the triboelectric generator in a wearable device, the material that comes into contact with the body must be safe, and the output must be constant despite any deformations caused by movement.

However, the output of conventional elastic triboelectric generators is affected by its change in form. The reason for this relationship was not clearly understood. Similar to previously existing products, there are limitations to precise detection if the output changes along with the change in form, such as stretching.

Feb 20, 2023

Facile and scalable production of a fuel-cell nanocatalyst for the hydrogen economy

Posted by in categories: economics, energy, nanotechnology, transportation

A fuel cell is an electric power generator that is capable of producing electricity from hydrogen gas while discharging only water as a waste product. It is hoped that this highly efficient clean energy system will play a key role in the adoption of the hydrogen economy, replacing the combustion engines and batteries in automobiles and trucks, as well as power plants.

However, the cost of platinum, which can be up to ~30,000 USD per kg, has been a major limitation, making catalysts prohibitively expensive. The production methods of highly-performing catalysts have also been complicated and largely limited. Accordingly, the development of a facile and scalable production method for platinum-based fuel cell catalysts is an urgent challenge, together with enhancing catalytic performance and stability while using a minimum amount of platinum.

To tackle this issue, a research team led by Prof. Sung Yung-Eun and Prof. Hyeon Taeghwan at the Center for Nanoparticle Research (CNR) within the Institute for Basic Science (IBS), South Korea has discovered a novel method for the production of nanocatalysts.

Feb 20, 2023

Supramolecular assembly assists the synthesis of highly active carbon-nitrogen-based photo/electrocatalysts

Posted by in categories: chemistry, energy

In a paper published in the journal National Science Open, the morphology and structure regulation methods of supramolecular assembly are summarized. Then, recent progresses of supramolecular assembly derived carbon-nitrogen-based materials for photo/electrocatalysis are discussed. Furthermore, the developments and challenges in future are prospected.

The sustainable energy storage and conversion technologies based on redox reactions are promising pathway to solve . However, there is still lack of low-cost, ecofriendly and highly active photo/electrocatalysts, which play a crucial role in the .

In this review, the author first summarized the effects of temperature, solvent type, pH value and monomer on the morphology and structure of the supramolecular assembly. Then, the effects of morphology and structure regulation on the physicochemical properties of supramolecular assembly-derived carbon-nitrogen-based materials were discussed, which determined the essential properties of catalysts for a specific photo/electrocatalytic reaction.

Feb 20, 2023

Hidden lights on the sun could help crack solar atmosphere mystery

Posted by in categories: energy, space

NASA’s NuSTAR telescope has spotted patches of high-energy X-rays radiation across the sun’s surface that could explain why the star’s atmosphere is mysteriously hot.

Feb 20, 2023

3 Independent Proofs That Quantum Fields Carry Energy

Posted by in categories: energy, quantum physics

Are quantum fields real, or are they simply calculational tools? These 3 experiments show that if energy is real, so are quantum fields.

Feb 18, 2023

This Arkansas school turned solar savings into better teacher pay

Posted by in categories: education, energy

The project that resulted has helped slash the district’s annual energy consumption by 1.6 million kilowatts and in three years generated enough savings to transform the district’s $250,000 budget deficit into a $1.8 million surplus.

Just as Hester envisioned at the outset, a major chunk of the money is going toward teachers’ salaries — fueling pay raises that average between $2,000 and $3,000 per educator per month.

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