机械专业英语阅读教程(第二版)课件
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Unit 12 Nanomaterial and micro-machine纳米材料与微型机械Nanomaterial [纳米材料]Nanomaterials represent today’s frontier in the development of novel advanced materials and present great promises and opportunities for a new generation of materials with improved and tailorable properties for applications in sensors, optoelectronics, energy storage, separation and catalysis.Applications of NanomaterialsThe first technological uses of these materials were as catalysts [催化剂] and pigments [颜料].In microelectronics, It would be ideal if the switching occurred with the motion of a single electron.In addition to technology, nanomaterials are also interesting systems for basic scientific investigations.Micro-machine1. IntroductionMany people may think that the smaller machines are easier to make. However, it is actually difficult to invent a small machine that will be significant to human beings. Here gives a possible reason.In addition to micro-machining, the development of micro-machines requires a number of technologies including materials, instrumentation, control, energy, information processing, and design.2. Micro-machine as Gentle MachinesThe most unique feature of a micro-machine is its small size. Micro-machines do not affect the object or the environment as much as conventional machines do. They perform their tasks gently.3. Micro-electronics and Mechatronics [机电一体化]The concept of micro-machines and related technologies is still not adequately unified , as these are still at the development stage .The micro-machines and related technologies are currently referred to by a variety of different terms.4. The Evolution of Machines and MicromachinesEver since the Industrial Revolution, machine systems have grown larger and larger in the course of their evolution.Only very recently has evolution in the opposite direction begun, with the appearance of mechatronics.The next target in miniaturization [微型化] of machine systems is miniaturization of the structural parts left untouched by present mechatronics.Notes1. Nanomaterials and nanotechnology have become a magic word in modernsociety. Nanomaterials repres ent today’s frontier in the development of novel advanced materials and present great promises and opportunities for a newgeneration of materials with improved and tailorable properties for applications in sensors, optoelectronics, energy storage, separation and catalysis.纳米材料和纳米技术已成为现代社会一个具有魔幻色彩的词汇。