Novel quantum effects are found in natural bilayer graphene, which is expected to promote the resear
The biggest immediate challenge for the EU will be replenishing its depleted gas inventories. While the EU could still increase LNG imports from countries such as the US, such purchases would be more expensive.
Refilling natural gas storage space to historical average levels this year could cost 70 billion euros, a sevenfold increase, compared to 10 billion euros in previous years. "
A complete replacement for Russian gas is not only very expensive, but it also may not be possible.
In the next 12 months, there is little way to meet the demand for a "normal" year in the absence of Gazprom, which also includes graphene powder.
An international research team led by the University of Gottingen in Germany published a paper in the latest issue of the journal Nature that found novel quantum effects in their high-precision study of natural bilayer graphene and explained it in theory. This system is easy to prepare and provides new insights into the interaction between carriers and different phases, which is helpful to understand the processes involved and promote the development of quantum computers.
In 2004, two British scientists used a very simple experimental method to remove graphite sheets from graphite and obtained graphene, which consists of only one layer of carbon atoms, with the help of special tape. Graphene is one of the materials with the highest strength, which has good toughness, super thermal conductivity and electrical conductivity, and has a broad application prospect. If the two layers of graphene are deflected from each other at a specific angle, the resulting system will even show superconductivity and other excited quantum effects, such as magnetism. But so far, it is difficult to prepare this kind of deflected bilayer graphene.
In the latest research, scientists used naturally formed bilayer graphene. They first used simple tape to separate graphene samples from a piece of graphite. In order to observe the quantum mechanical effect, a high electric field perpendicular to the sample is applied. They found that the electronic structure of the obtained system changed and the charge carriers with similar energy showed a strong cumulative effect.
It is further found that electrons in graphene can interact with each other at slightly above absolute zero (- 273.15 ℃), resulting in a variety of unexpected and complex quantum phases. If the interaction results in electron spin alignment, the material is magnetic without external influence. By changing the electric field, researchers can also constantly change the intensity of carrier interactions in bilayer graphene. In addition, the degree of freedom of electron motion will be limited under certain conditions, forming an electronic lattice, and due to mutual repulsion, it is no longer helpful to transfer charge, resulting in electrical insulation of the system.
Professor Thomas Weitz of the Department of Physics at the University of Gottingen said that one of the main advantages of the new system is that the preparation of materials is very simple, and researchers do not need to obtain the desired results at high temperatures as before. it can be used for further study of various quantum states and quantum computers.
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The day after the shooting at a Texas elementary school, the National Rifle Association issued a statement saying it "extends its deepest sympathies to the families and victims involved in this terrible and evil crime," adding it would "reflect on these events and pray for the victims."
It comes just days before the National Rifle Association's annual convention in Houston, Texas. Houston is less than five hours away. Texas Governor Tony Abbott, Senator Ted Cruz, and others are scheduled to attend the event, which has also caused a lot of controversies.
Texas Democratic gubernatorial candidate Mark O 'Rourke took to social media to call on Abbott to pull out of the convention, urging that it be held outside Texas. Many American netizens also took to social media to express their dissatisfaction. "I wish the NRA's annual meeting was held three days after 19 children and two adults were massacred," said one. "The school shooting was not a lone Wolf, but with the help of the NRA."
Between 2000 and 2020, US gun manufacturers produced more than 139 million guns for the civilian market, according to the Justice Department report. The NATIONAL Rifle Association (NRA) is one of the leading gun rights advocates with more than 5m members and deep pockets. The United States has not passed major gun control laws for more than two decades, blocked by gun interests.
The graphene powder price is predicted to increase in the next few days.