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Engineers have developed cheap, scalable methods to make metamaterials that can manipulate microwave energy

Engineers at Tufts University have developed new methods to more efficiently manufacture materials that exhibit abnormal behavior when interacting with microwave energy, which has potential effects on telecommunications, GPS, radar, mobile devices, and medical equipment. They are called metamaterials, sometimes referred to as "impossible materials" because in theory they can bend the energy around objects to make them appear invisible, concentrate energy transfer into a focused beam, or have chameleon-like capabilities To reconfigure their absorption or transmission in different frequency ranges.
02 2021/07

The composite mechanical super-friction material realizes multifunctional applications in energy harvesting and intelligent monitoring and perception

Mechanical metamaterials are different from other functional materials from the material point of view. Their superior mechanical properties are mainly derived from local microstructure cells. In recent years, with the development of mechanical metamaterials, triboelectric materials with both energy harvesting and monitoring and sensing functions have brought new directions for the intelligent development of multifunctional mechanical metamaterials.
02 2021/07

Researchers develop deployable systems that are light, compact, inexpensive, and easy to manufacture

Expandable structure: objects that transition from a compact state to an expanded state, from the backyard to Mars everywhere. However, it is sometimes a challenge to convert a two-dimensional form into a three-dimensional structure. Now, researchers at Harvard University's John A. Paulson School of Engineering and Applied Sciences (SEAS) and Harvard Graduate School of Design have developed a deployable system that is light, compact, inexpensive, easy to manufacture, and most importantly The thing is, easy to deploy. By taking advantage of the mechanical instability in the curved beam, the system can transform objects into detailed and customizable 3D configurations of all sizes, from large furniture to small medical equipment.
02 2021/07

New research is expected to help the development of new energy storage methods and higher purity materials

Scientists at Osaka University, Panasonic Corporation, and Waseda University used scanning electron microscopy (SEM) and X-ray absorption spectroscopy to determine which additives cause crystallization in supercooled aqueous solutions. This work may help the development of new energy storage materials based on latent heat.
02 2021/07

Modern micro-nano technology methods open a new chapter in the functionalization of semiconductor materials

One vision currently driving materials scientists is to combine organic molecules (and their diverse functions) with the technological possibilities offered by extremely complex semiconductor electronics. Thanks to modern micro-nano technology methods, the latter has designed more efficient electronic components for various applications. However, it is also getting closer and closer to its physical limits: methods using traditional techniques cannot produce smaller structures for functionalized semiconductor materials such as silicon.
02 2021/07

The nanocomposite catalyst obtained by using quasicrystals is better than most industrial catalysts

As an ideal chemical fuel, energy carrier and energy storage tool, hydrogen can help resolve energy crises and improve environmental protection. Hydrogen production by catalytic reforming of methanol steam is an important industrial hydrogen production method, which can be applied to fuel cells and has great potential in the transportation field. Seeking a simple process, no precious metals, green, non-toxic, low-temperature and high-efficiency catalyst is the research hotspot of methanol steam reforming to produce hydrogen. Quasicrystals are a new form of matter discovered in the 1980s. They have long-range quasi-periodic order and rotational symmetry that traditional crystals do not possess. Quasicrystals have excellent properties such as wear resistance, corrosion resistance, and high hardness, but they also have great brittleness. Due to the brittleness of quasicrystals, the industrial applications of quasicrystals are limited, especially as structural materials.
21 2021/01
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