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Researchers at Japan advanced institute of science and technology (JAIST) have successfully fabrication the suspended graphene nanomesh in a large area by the helium ion beam microscopy. 6nm diameter nanopores were pattern on the 1.2 um long and 500 nm wide suspended graphene uniformly. By systematically controlling the pitch (nanopore’s center to nanopore’s center) from 15 nm to 50 nm, a series of stable graphene nanomesh devices were achieved. This provides a practical way to investigate the intrinsic properties of graphene nanomesh towards the application for gas sensing, phonon engineering, and quantum technology.

Graphene, with its excellent electrical, thermal and optical properties, is promising for many applications in the next decade. It is also a potential candidate instead of silicon to build the next generation of electrical circuits. However, without a bandgap, it is not straightforward to use graphene as field-effect transistors (FETs). Researchers tried to cut the graphene sheet into a small piece of graphene nanoribbon and observed the bandgap opening successfully. However, the current of graphene nanoribbons is too low to drive the integrated circuit. In this case, the graphene nanomesh is pointed out by introducing periodical nanopores on the graphene, which is also considered as very small graphene nanoribbon array.

A research team led by Dr Fayong Liu and Professor Hiroshi MIZUTA has demonstrated in collaboration with researchers at the National Institute of Advanced Industrial Science and Technology (AIST) that large area suspended graphene nanomesh is quickly achievable by the helium ion beam microscopy with sub-10 nm nanopore diameter and well-controlled pitches. Comparing to slow speed TEM patterning, the helium ion beam milling technique overcomes the speed limitation, and meanwhile, provides a high imaging resolution. With the initial electrical measurements, it has found that the thermal activation energy of the graphene nanomesh increased exponentially by increasing the porosity of the graphene nanomesh. This immediately provides a new method for bandgap engineering beyond the conventional nanoribbon method. The team plans to continue exploring graphene nanomesh towards the application of phonon engineering.

In a study published on May 7, 2020, in Current Biology, researchers from University of Sydney have identified the single gene that determines how Cape honey bees reproduce without ever having sex. One gene, GB45239 on chromosome 11, is responsible for virgin births.

“It is extremely exciting,” said Professor Benjamin Oldroyd in the School of Life and Environmental Sciences. “Scientists have been looking for this gene for the last 30 years. Now that we know it’s on chromosome 11, we have solved a mystery.”

Behavioral geneticist Professor Oldroyd said: “Sex is a weird way to reproduce and yet it is the most common form of reproduction for animals and plants on the planet. It’s a major biological mystery why there is so much sex going on and it doesn’t make evolutionary sense. Asexuality is a much more efficient way to reproduce, and every now and then we see a species revert to it.”

In a preprint paper, DeepMind researchers propose a paradigm for comparing the exploration behaviors of children and AI models.

A few years after Li Jinxing graduated from college, he returned to his rural hometown to become a flower farmer. The days were long but the routine familiar: rise early and tend to the blossoms in the morning; trim and package those in bloom during the afternoon; deliver the parcels, delicately stacked in trucks, to customers by late evening.

Where the flowers ended up, Li was never quite sure. From his fields in Yunnan province, China, he sold them to national distributors who sold them to flower shops who sold them to end consumers. He imagined the beautiful fruits of his labor brightening up homes around the country. This had been the life work of his family for generations. It all threatened to come to an end with covid-19.

Li, 27, remembers the exact moment he heard about the viral outbreak: it was past midnight on January 20, 2020. The Chinese New Year was only five days away, and he had spent the day harvesting flowers in preparation for the expected holiday bump in sales. As he swiped through Douyin, China’s version of TikTok, he saw a fleeting mention of the disease. Li wasn’t sure what to think. Wuhan was nearly 1,200 miles away—the problem felt distant and intangible. Days later, it snowed on New Year’s Eve, he remembers. He took it as an auspicious sign.

Also could do a magnonic fusion reactor.

Magnetic Islands

But there may be a way to force the plasma into doing what we want more predictably and efficiently, as detailed in a new theoretical paper published in the journal Physics of Plasmas.

Continue reading “Physicists Discover New Trick to Stabilize Fusion Reactors” »

Hospitals Lose Money During Pandemic; Healthcare Workers Face Layoffs, Cut Hours Faced with lost revenue from canceled elective procedures, hospitals laid off 1.4 million health care workers in April, including nearly 135,000 from hospitals.

More than 12,000 Catholic churches have now applied for the government’s small business loans – and 75% of those applications have been approved.

“In the 1960s, Italian media uncovered evidence that the Vatican had invested in entities that conflict directly with the church’s holy mission, including Istituto Farmacologico Serono, a pharmaceutical company that made birth control pills, and Udine, a military weapons manufacturer. There have also been unconfirmed rumor of church money in firearms manufacturer Beretta and companies with activities in gambling and pornography. It has been linked to dealings with Nazi gold during World War II as well.”

How much real estate does the Catholic Church own? What are its equity holdings? These questions, and more, not answered.

Author: Emily StewartPublish date:

Continue reading “How Rich Is the Catholic Church? It’s Impossible to Tell” »

A group of scientists led by Teruki Honma of the RIKEN Center for Biosystems Dynamics Research and including collaborators from Hoshi University and Mizuho Information & Research Institute have released key data on the proteins associated with the novel coronavirus that causes COVID-19. As a means to facilitate the development of anti-COVID-19 therapeutics, crystal structures of dozens of drug targets including the virus’s main protease, RNA dependent RNA polymerase, and S protein have been published by Protein Data Bank (PDB). The research group has performed ab initio quantum chemical calculations based on the crystal structures using the fragment molecule orbital method, and published the data at FMODB as a database for data acquired using that method. According Honma, “We hope that this data will help scientists quickly develop therapies for this devastating virus. We will continue to perform FMO calculations on newly released protein structures and update our data. This data will be important by allowing an understanding of the precise energy data for interactions between drug candidates and virus proteins.”

The data is available at FMODB: The database of quantum mechanical data based on the FMO method.