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相关概念视频

Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...

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Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures
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Published on: July 2, 2012

碳纳米管执行器的执行器

Baughman1, Cui, Zakhidov

  • 1Research and Technology, AlliedSignal, 101 Columbia Road, Morristown, NJ 07962-1021, USA. Intelligent Polymer Research Institute, University of Wollongong, New South Wales 2522, Australia. School of Engineering, University of Pisa, Centro E. Pia.

Science (New York, N.Y.)
|May 21, 1999
PubMed
概括

单壁碳纳米管板创建强大的机电驱动器,其性能优于自然肌肉和铁电. 这些新型执行器采用独特的机制,避免了其他技术对未来高性能应用的局限性.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 电子机械系统 电子机械系统

背景情况:

  • 传统的执行器经常面临压力,应变或操作寿命的限制.
  • 现有的技术,如铁电和导电聚合物有缺点,如低应变或依赖离子间隙.
  • 自然肌肉作为生物启动的基准,但很难通过人工复制.

研究的目的:

  • 调查单壁碳纳米管 (SWCNT) 板作为高性能电机械执行器的潜力.
  • 将SWCNT执行器的性能指标 (压力,应变) 与天然肌肉和传统人工执行器进行比较.
  • 阐明执行机制,并确定与现有技术相比的优势.

主要方法:

  • 使用单壁碳纳米管板制造机电执行器的制造.
  • 执行器性能的表征,包括压力产生和应变能力.
  • 调动机制的分析,重点是电化学双层充电.
  • 将性能数据与已建立的基准数据进行比较,例如天然肌肉和铁电材料.

主要成果:

  • SWCNT执行器表现出比自然肌肉更高的应力和比高模块铁电器更高的应力.
  • 执行机制依赖于通过电化学双层充电的基于量子化学的扩张,避免离子间隙.
  • 在低工作电压 (几伏) 时,实现了较大的执行器应变.
  • 执行器作为数十亿个纳米级执行器的宏观组合而起作用.

结论:

  • SWCNT板材是开发先进的机电驱动器的一个有前途的材料.
  • 这种新型的驱动机制比离子间隙聚合物驱动器和传统铁电器具有显著的优势.
  • 优化的SWCNT执行器在工作密度方面有可能超越当前技术.
  • 这些发现为下一代执行器铺平了道路,具有卓越的性能特征.