A research team at Columbia University in the United States has developed a new technology that successfully created the first single-molecule diode with a rectification ratio of 250 and a performance 50 times higher than all previous designs. It is expected to be practically applied in the field of nanodevices.
Single-molecule devices are the ultimate in miniaturization of electronic devices. It is not easy to design a single molecular circuit using chemical and physics concepts and to make it functional. The research team is currently working hard to understand the physical basis behind this achievement, trying to further improve the rectification ratio with new molecular systems.
Foreign media selection
Your next move can be predicted
A paper published by the Norwegian University of Science and Technology researchers in Nature found that by observing the neural activity signals in the brain, you can determine where you are going next. In the experiment, they ran the rats in a staggered way in a continuous labyrinth, and the researchers performed electrophysiological recordings of the prefrontal cortex, thalamus, and hippocampus, and analyzed the neuronal activity of the rats when they decided to route. It was finally found that information on the next step of the experiment object can be obtained based on the intensity of the discharge.
Controversy this week
For artificial intelligence weapons, this statement!
The British "Nature" magazine commentary said that experts in artificial intelligence (AI) and robotics must decide whether they support or oppose the deadly autonomous weapon system (LAWS), just as physicists expressed their views on nuclear weapons, because "this The risk in a field is high." The article stated: "The deadly autonomous weapon system is described as the third revolution of war, while the first two are gunpowder and nuclear weapons." If nothing is done, it is equivalent to support the continued development and use.
Frontier exploration
The size of time and space foam far exceeds prediction
American scientists have recently used X-ray and gamma ray observation techniques to study the most distant matter in the universe, and found that the diameter of space-time foam is about one-thousandth of the hydrogen nucleus, not one billion, which is more than before prediction. It’s much bigger. Their findings set the bottom line for the quantum nature of time and space or "foaminess."
Scientists discover new "pain genes"
A research team led by the University of Cambridge recently identified a new gene, PRDM12, which is essential for the production and formation of pain nerves and can be used as a drug target to help develop new ways to relieve pain. To date, the PRDM12 gene is the fifth gene found to be associated with analgesia, and the two genes previously discovered have brought new painkillers.
NASA will conduct a second round of testing on the new spaceship
NASA will launch a second round of test launches on the Low Density Supersonic Reducer (LDSD) spacecraft on June 2, at the US Navy's Pacific Missile Range in Hawaii, which will simulate the spacecraft's deceleration into the Martian atmosphere in the Earth's atmosphere. . The LDSD mission is led by NASA's Jet Propulsion Laboratory and is part of NASA's plan to send humans to asteroids in 2025 and humans to Mars in 2030.
"most" case scene
Probably the most environmentally friendly computer chip
Electronic products are usually made of non-renewable, non-biodegradable and potentially toxic substances, and their speed of replacement is increasing, resulting in an increasingly heavy environmental burden. American scientists have confirmed the feasibility of using cellulose nanofibers (CNF), a flexible biodegradable material made of wood, as a computer chip substrate. Its performance is comparable to existing chips, but the manufacturing process is super environmentally friendly.
One week technical refresh
New technology for hydrogen production from solar electrolysis water
Scientists at the Helmitz Solar Fuel Research Institute in Germany have used special nanomaterials to invent a new process for efficient use of solar hydrogen. This is not an easy task, because the hydrogen production process of electrolyzed water is best carried out in an acidic environment, but such an environment easily rusts the solar cell and consumes a large amount of electrical energy, and the new nanomaterial is well evaded. With this problem, the efficiency of converting solar energy into electrical energy can reach 80%.
Photogenetic technology helps memory loss in memoryless mice
For many years, neuroscientists have been arguing about the causes of degenerative amnesia, and using light to activate brain cells, to retrieve "missing" memories or to help answer this question. Recently, researchers at the Massachusetts Institute of Technology in the United States have used optogenetic tools to recapture memories in mice that have lost memory due to a lack of memory consolidation. This outcome may explain the real cause of degenerative amnesia.
Wonderful scandal
Will you fix your own robot?
“You don’t need to set it up in advance and people can control it. After damage, you can adapt to the new situation and change the way of moving until the task is completed.†This is a new machine learning algorithm that can make the damaged robot in a short time. Adapt to new situations and restore the ability to perform tasks. The technology has been proven to work in a six-legged robot and a robotic arm, and is expected to help scientists develop more robust, efficient and autonomous robots in the future.
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