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1 IntroductionThe history of electron backscatter diffraction (EBSD) should be traced back to the band-shaped diffraction pattern seen by Kikuchi in a transmission electron microscope in 1928, the Kikuchi line, although this Kikuchi line is transmitted electronically. Until 1954, Alam,…

introductionSteel is quenched by heating the steel to a temperature above the critical temperature Ac3 (hypo-eutectoid steel) or Ac1 (hypereutectoid steel), holding it for a period of time so as to be austenitized in whole or in part, and then…

First, the molecular beam epitaxial profileIn the ultra-high vacuum environment, with a certain thermal energy of one or more molecules (atoms) beam jet to the crystal substrate, the substrate surface reaction processMolecules in the “flight” process almost no collision with…

1, Review of Organic Halide Perovskite – related Photoelectric PropertiesFigure 1 Spectral position and PL peakOrganic halide perovskites are widely used in optoelectronics research. Methyl ammonium and formamidine lead iodide as photovoltaics show excellent photoelectric properties and stimulate researchers’ enthusiasm…

First, the development of a brief historyThe first stage: 1945 to 1951, the invention of nuclear magnetic resonance and lay the theoretical and experimental basis of the period: Bloch (Stanford University, observed in the water proton signal) and Purcell (Harvard…

First, the basic concept of particle size analysis(1) particles: with a certain size and shape of small objects, is the basic unit of the composition of the powder. It is very small, but microscopic but contains a lot of molecules…

【introduction】The construction of flexible electronic devices with certain functions and structures provides a variety of possibilities for human life in the future, such as wearable electronic products, implantable chips, sensing skin, flexible robots, and so on. With the deepening of…

1 IntroductionCorrosion to metal materials caused by the huge loss of huge. Some people count the annual corrosion of scrap metal around 100 million tons, accounting for 20% to 40% of annual production. And with the process of industrialization, corrosion…

1, Nature Materials Cover: The use of “phagocytosis” synthesis of functional colloidal particlesUniversity of Bristol Stephen Mann (author) and other people inspired by cell phagocytosis, the preparation of self-driven magnetic Pickering emulsion (MPE), can be selective intake of silica gel…

【introduction】Most of the metal, ceramic and semiconductor materials are made of polycrystalline. In contrast, although the performance of single crystal is often more excellent, but due to cost constraints, its scope of application is still very limited, can not achieve…

[Overview] A group of engineers developed a stretchable fuel cell that extracts energy from sweat and can power electronic devices such as LEDs and Bluetooth radios. Biofuel cells have 10 times more power per surface area than any existing wearable…

Now with the popularity of smart phones, our choice of smart phones has become more and more, and we choose the standard has become diversified. The first few years, especially a coarse grain phone, the most favorite benchmark. Then again,…

Principle of friction stir weldingFriction stir welding refers to the use of high-speed rotation of the welding tool and the workpiece friction heat to make the welding material local plastic, when the welding tool along the welding interface forward, the…

What exactly is limiting the battery capacity?For this problem, we can see this: battery capacity = energy density x battery volume. The battery size naturally want to do on how to do, energy density is the key.So the question can…

1.laser weldingLaser welding: laser radiation to be processed surface, the surface heat through the heat conduction to the internal diffusion, by controlling the laser pulse width, energy, peak power and repetition frequency and other laser parameters, so that the workpiece…