Magnetic nanomaterial to protect securities from counterfeiting. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Magnetic nanomaterial to protect securities from counterfeiting

04.03.2021

An international team of scientists has developed a new composite nanomaterial based on iron, cobalt and nickel with controlled magnetic properties. The resulting material can be used to protect money and securities from counterfeiting.

Counterfeiting a currency is becoming more and more difficult every year, thanks to modern science and new, complex composite materials.

Today, the development of technologies for the synthesis of new magnetic nanomaterials with improved and controlled functional properties are promising areas of research. Due to nanosize and, accordingly, special electrical and magnetic properties, such materials have the potential to be used from mobile electronic devices to space technologies, where special requirements are imposed on materials in terms of the quality and size of products made from them.

To obtain a magnetic nanomaterial based on the iron-cobalt-nickel ternary system, the technology of chemical deposition followed by hydrogen reduction was used.

The developed material is highly resistant to demagnetizing factors, which opens up prospects for its use as a filler for magnetic rubbers, for protecting money and securities from counterfeiting, as well as in devices using the principle of magnetic coupling.

<< Back: Huawei smart home 04.03.2021

>> Forward: The Gulf Stream slowed down due to global warming 03.03.2021

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

DNA electric wire 29.06.2016

Researchers at Arizona State University and Duke University have discovered that good electrical wiring can, in principle, be made from DNA.

It's not so much that the long, helical DNA itself resembles an electrical cord. Every molecule is an atom whose electrons can be free to some extent. Free electrons can run from place to place, provided, of course, that they have somewhere to run. DNA has such "potentially running" electrons, but for a long time it was not clear exactly how they can move around the molecule.

As you know, quantum-wave dualism is inherent in electrons, that is, they behave both as particles (quanta) and as waves. Previously, Nongjian Tao, David N. Beratan and their colleagues found that DNA electrons behave differently at different distances: if at a short distance the electrons propagate like a wave, then at a large distance they are larger. resemble particles jumping from place to place, as happens in semiconductors. If we talk about efficiency, then the first method is preferable: electrons "in the form of a wave" move more smoothly and faster than "in the form of a particle."

In their new experiments, the researchers wanted to see if it was possible to make the electrons in DNA "wave" over long distances, too. As we know, each DNA chain consists of many monomers: four nitrogenous bases (A, T, G, C) attached to the ribose sugar, encoding genetic information; in turn, riboses with bases are connected into a thread through phosphoric acid.

A double-stranded DNA strand is quite strong, but it can bend, change shape, the parameters of the helix can change towards more or less helicity, etc. - all this affects how electrons will travel in it. Finally, the very sequence of bases is also important here - it can be assumed that some complexes of genetic "letters" will turn out to be more conductive than others.

Indeed, with the help of computer simulations, it was possible to find out that the repeating guanine (G) blocks help electrons to run in waves not only for small, but also for long distances. And that such sections will help electrons cope with obstacles that arise due to the movement of different parts of the DNA chain, due to bends, curvatures, etc.

Experiments with short, only 6-16 genetic "letters" DNA fragments showed that everything is really like this: guanine complexes improve the conductivity of the molecule. Since the bases of the chains correspond to each other according to the principle of complementarity, that is, if one has A, then the other will have T, and if one has G, then the other has C, then the guanine blocks looked like alternating GC.

The sequence of DNA influences the behavior of electrons and the conductivity of the molecule itself. Obviously, one could try to synthesize such DNA in which electrons would provide good conductivity - such a molecule could possibly compete with those bacterial villi. On the other hand, conductivity must change due to mutations, that is, due to changes in the DNA sequence, which could somehow be used in medical genetics.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews