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Archive for the ‘chemistry’ category: Page 4

Sep 5, 2022

Inside ‘lost city’ hidden in deep ocean with ‘unusual’ terrain — and it’s baffling scientists

Posted by in category: chemistry

AN UNDERWATER city of unique, upward-reaching rocks and chemical reactions has scientists wondering if they’ve found the answer to how life begins.

The Lost City Hydrothermal Field is situated in the depths of the Atlantic Ocean near the Mid-Atlantic Ridge.

The Lost City is affixed on top of an underwater mountain and spreads out over 5,000 square feet.

Continue reading “Inside ‘lost city’ hidden in deep ocean with ‘unusual’ terrain — and it’s baffling scientists” »

Sep 5, 2022

A new laser-based chlorination process to create high doping patterns in graphene

Posted by in categories: chemistry, nanotechnology

In recent years, electronics and chemical engineers have devised different chemical doping techniques to control the sign and concentration of charge carriers in different material samples. Chemical doping methods essentially entail introducing impurities into materials or substances to change their electrical properties.

These promising methods have been successfully applied on several materials including van der Waals (vdW) materials. VdW materials are structures characterized by strongly bonded 2D layers, which are bound in the third dimension through weaker dispersion forces.

Researchers at University of California, Berkeley (UC Berkeley), the Kavli Energy Nanosciences Institute, Beijing Institute of Technology, Shenzhen University, Tsinghua University recently introduced a new tunable and reversible approach to chemically dope graphene. Their approach, introduced in a paper published in Nature Electronics, is based on laser-assisted chlorination.

Sep 5, 2022

‘Impossible’ chemistry may reveal origins of life on Earth

Posted by in category: chemistry

Experiments suggest that metabolism could have begun spontaneously on our primordial planet—and that scientists may need to rethink how we define life.

Sep 4, 2022

Simulation #409 Dr. Joscha Bach — Conscious Machines

Posted by in categories: alien life, chemistry, cybercrime/malcode, internet, mathematics, quantum physics, robotics/AI

Dr. Joscha Bach is VP of Research at AI Foundation and Author of Principles of Synthetic Intelligence, focused on how our minds work, and how to build machines that can perceive, think, and learn.

http://bach.ai.
Twitter ►
https://twitter.com/Plinz.

Continue reading “Simulation #409 Dr. Joscha Bach — Conscious Machines” »

Sep 4, 2022

Was the universe made for us?

Posted by in categories: alien life, chemistry, physics

Check out the physics courses that I mentioned (many of which are free!) and support this channel by going to https://brilliant.org/Sabine/ where you can create your Brilliant account. The first 200 will get 20% off the annual premium subscription.

In this video I explain how the argument that the universe is finetuned for life works, why it’s wrong, how the mistake happens, and what that means for the existence of god and the multiverse.

Continue reading “Was the universe made for us?” »

Sep 3, 2022

Chaotic circuit exhibits unprecedented equilibrium properties

Posted by in categories: biological, chemistry, economics, internet, mathematics, robotics/AI

Mathematical derivations have unveiled a chaotic, memristor-based circuit in which different oscillating phases can co-exist along six possible lines.

Unlike ordinary electronic circuits, chaotic circuits can produce oscillating that never repeat over time—but nonetheless, display underlying mathematical patterns. To expand the potential applications of these circuits, previous studies have designed systems in which multiple oscillating phases can co-exist along mathematically-defined “lines of .” In new research published in The European Physical Journal Special Topics, a team led by Janarthanan Ramadoss at the Chennai Institute of Technology, India, designed a chaotic circuit with six distinct lines of equilibrium—more than have ever been demonstrated previously.

Chaotic systems are now widely studied across a broad range of fields: from biology and chemistry, to engineering and economics. If the team’s circuit is realized experimentally, it could provide researchers with unprecedented opportunities to study these systems experimentally. More practically, their design could be used for applications including robotic motion control, secure password generation, and new developments in the Internet of Things—through which networks of everyday objects can gather and share data.

Sep 3, 2022

Aluminum-gallium powder bubbles hydrogen out of dirty water

Posted by in categories: chemistry, energy, nanotechnology

“We don’t need any energy input, and it bubbles hydrogen like crazy. I’ve never seen anything like it,” said UCSC Professor Scott Oliver, describing a new aluminum-gallium nanoparticle powder that generates H2 when placed in water – even seawater.

Aluminum by itself rapidly oxidizes in water, stripping the O out of H2O and releasing hydrogen as a byproduct. This is a short-lived reaction though, because in most cases the metal quickly attains a microscopically thin coating of aluminum oxide that seals it off and puts an end to the fun.

But chemistry researchers at UC Santa Cruz say they’ve found a cost-effective way to keep the ball rolling. Gallium has long been known to remove the aluminum oxide coating and keep the aluminum in contact with water to continue the reaction, but previous research had found that aluminum-heavy combinations had a limited effect.

Sep 2, 2022

‘Diamond rain’ on giant icy planets could be more common than previously thought

Posted by in categories: chemistry, space

A new study has found that “diamond rain,” a long-hypothesized exotic type of precipitation on ice giant planets, could be more common than previously thought.

In an earlier experiment, researchers mimicked the and pressures found deep inside ice giants Neptune and Uranus and, for the first time, observed diamond rain as it formed.

Investigating this process in a that more closely resembles the chemical makeup of Neptune and Uranus, scientists from the Department of Energy’s SLAC National Accelerator Laboratory and their colleagues discovered that the presence of oxygen makes diamond formation more likely, allowing them to form and grow at a wider range of conditions and throughout more planets.

Sep 2, 2022

Revolutionizing Infrared Sensing Could Transform Imaging Applications

Posted by in categories: biotech/medical, chemistry, food, health, military, quantum physics

The infrared (IR) spectrum is a vast information landscape that modern IR detectors tap into for diverse applications such as night vision, biochemical spectroscopy, microelectronics design, and climate science. But modern sensors used in these practical areas lack spectral selectivity and must filter out noise, limiting their performance. Advanced IR sensors can achieve ultrasensitive, single-photon level detection, but these sensors must be cryogenically cooled to 4 K (−269 C) and require large, bulky power sources making them too expensive and impractical for everyday Department of Defense or commercial use.

DARPA’s Optomechanical Thermal Imaging (OpTIm) program aims to develop novel, compact, and room-temperature IR sensors with quantum-level performance – bridging the performance gap between limited capability uncooled thermal detectors and high-performance cryogenically cooled photodetectors.

“If researchers can meet the program’s metrics, we will enable IR detection with orders-of-magnitude improvements in sensitivity, spectral control, and response time over current room-temperature IR devices,” said Mukund Vengalattore, OpTIm program manager in DARPA’s Defense Sciences Office. “Achieving quantum-level sensitivity in room-temperature, compact IR sensors would transform battlefield surveillance, night vision, and terrestrial and space imaging. It would also enable a host of commercial applications including infrared spectroscopy for non-invasive cancer diagnosis, highly accurate and immediate pathogen detection from a person’s breath or in the air, and pre-disease detection of threats to agriculture and foliage health.”

Sep 2, 2022

Astrophysicist Says We May Have Already Observed Wormholes Created by Alien Civilization

Posted by in categories: alien life, chemistry

“Intrinsically unstable, a wormhole would need ‘stuff’ with repulsive gravity to hold open each mouth, and the energy equivalent to that emitted by an appreciable fraction of the stars in a galaxy,” reads Science Focus’ story. The idea would be that “if ETs have created a network of wormholes, it might be detectable by gravitational microlensing.”

That technique has been used in the past to detect thousands of distant exoplanets and stars by detecting how they bend light. Whether it could be used to detect wormholes, to be clear, is an open question.

Fortunately, spotting wormholes isn’t our only shot at detecting life elsewhere in the universe. Science Focus also pointed to the search for theoretical megastructures that harness the energy of a star by fully enclosing it, or atmospheric chemicals linked to human pollution, or extremely thin reflective spacecraft called light sails, any of which could theoretically lead us to discover an extraterrestrial civilization.

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