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相关概念视频

Potentiometer01:30

Potentiometer

Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, which introduces uncertainties in the measurements. Null measurements balance the voltages so that no current flows through the measuring device and, therefore, no alterations occur in the measured circuit.
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...
PD Controller: Design01:26

PD Controller: Design

In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...

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相关实验视频

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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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基于石墨烯的可调节的双频特拉赫兹传感器

Maixia Fu1,2,3, Yuchao Ye1,2,3, Yingying Niu1,2,3

  • 1Key Laboratory of Grain Information Processing and Control, Ministry of Education, Henan University of Technology, Zhengzhou 450001, China.

Nanomaterials (Basel, Switzerland)
|February 23, 2024
PubMed
概括

这项研究介绍了一种可调节的双频段太赫兹传感器,使用石墨烯. 石墨烯传感器在两个不同的特拉赫兹频率实现了近乎完美的吸收,并证明了用于传感应用的动态调性.

关键词:
双频频道是双频的石墨烯是一种石墨烯.传感器 传感器 传感器太赫兹 (Terahertz) 是一个频率.可调的 可调的

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科学领域:

  • 太赫兹 (THz) 科学和技术
  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学

背景情况:

  • 太赫兹 (THz) 传感为非电离光谱和成像提供了独特的功能.
  • 石墨烯的可调节电子特性使其成为新型THz设备的有希望的材料.
  • 开发高效且可调节的THz传感器对于先进的应用至关重要.

研究的目的:

  • 提出和数值模拟基于图案单层石墨烯的可调节的双频段太赫兹传感器.
  • 调查拟议的传感器的吸收特性和质量因子.
  • 探索传感器响应的动态调整性及其分析物检测潜力.

主要方法:

  • 用数值模拟来设计和分析太赫兹传感器.
  • 传感器架构包括一个金属底层,一个介电层和图案的石墨烯条.
  • 石墨烯中的等离子体共振被用来解释传感机制.

主要成果:

  • 传感器显示了2.58 THz (~100%吸收) 和6.07 THz (~98%吸收) 的两个显著的吸收峰值.
  • 在各自的共振频率下,获得了11.8和29.6的质量因子.
  • 传感器显示了通过电场或化学兴奋剂的动态调制性,在分析物相互作用时可观察到的频率变化.

结论:

  • 拟议的基于石墨烯的传感器在太赫兹模式下提供高吸收和双频段操作.
  • 动态可调性允许对分析物的敏感检测和表征.
  • 该传感器在材料表征,医学诊断和环境监测等领域具有很大的应用潜力.