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相关概念视频

Van de Graaff Generator01:15

Van de Graaff Generator

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Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...
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Double-barreled and Concentric Microelectrodes for Measurement of Extracellular Ion Signals in Brain Tissue
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用于发电机收集器实验的双桶碳纤维微电极

Paula C Falcoswki1, Douglas P M Saraiva1, Nicolas A Ishiki2

  • 1Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo 05508-900, Brazil.

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概括

研究人员为电化学研究开发了一种新的双碳纤维微电极. 这种廉价的装置采用双管毛细血管制造, 有望在发电机收集系统中进行定量分析.

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科学领域:

  • 电化学
  • 材料科学

背景情况:

  • 发电机收集器系统对于电化学研究至关重要,包括动力学和量化.
  • 微电极为精确测量提供了明确的扩散形状等优势.

研究的目的:

  • 描述一种用于制造双碳纤维微电极的新方案.
  • 在发电机-采集器和扫描电化学显微镜 (SECM) 配置中评估微电极的性能.
  • 证明微电极对于分析量化的实用性.

主要方法:

  • 使用双管毛细血管和廉价碳纤维制造双碳纤维微电极.
  • 微电极的电化学特征和扫描电子显微镜 (SEM) 成像.
  • 用氧化还原探针 ([Ru(NH3) 6 3+) 和SECM分析/系统的发生器采集器模式的应用.

主要成果:

  • 制造的微电极具有微光盘几何形状,具有明确的扩散.
  • 在接近SECM的绝缘基板时观察到收集效率的提高.
  • 通过将化物/系统中的硫酸盐度与收集效率相关联来获得分析信息.

结论:

  • 建立了一个具有成本效益和简单的方法来制造双碳纤维微电极.
  • 该微电极适用于发电机-采集器和SECM应用,证明了有效的氧化还原探针采集.
  • 该装置显示了电化学系统中的定量分析测量潜力.