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相关概念视频

Pressure Gauges01:20

Pressure Gauges

Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...

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高灵敏度石墨烯MOEMS共振压力传感器

Yujian Liu1, Cheng Li1,2, Xiaodong Shi3

  • 1School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China.

ACS applied materials & interfaces
|June 12, 2023
PubMed
概括

这项研究引入了一种新的石墨烯共振压力传感器,可显著减少能量损失并防止气体泄漏. 新设计为先进的压力传感应用提供了更高的灵敏度和稳定性.

关键词:
莫姆斯 (MOEMS) 是一个词.石墨烯是一种石墨烯.压力传感器 压力传感器响应器 响应器 响应器真空密封的密封方式

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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
  • 传感器技术 传感器技术

背景情况:

  • 石墨烯纳米机械共振器具有高压敏度,但在非真空环境中会遭受能量损失和气体泄漏.
  • 现有的设计面临空气和材料透的挑战,限制了长期的稳定性和性能.

研究的目的:

  • 开发一种新的石墨烯共振压力传感器,其稳定性提高,能耗降低.
  • 为了克服基于石墨烯的压力传感器中气体透和空气阻尼的局限性.

主要方法:

  • 使用微光电机械系统 (MOEMS) 技术,使用真空密封的多层石墨烯膜.
  • 采用间接敏感的方法,将石墨烯粘附在一个槽,压力敏感的膜上.
  • 集成了一个全光学封装腔结构.

主要成果:

  • 与传统设计相比,在大气条件下实现了60倍低的能量损失.
  • 显示高压灵敏度为1.7Hz/Pa,比同行高5倍.
  • 获得了高信号噪声比 (6.9 × 10−5 Pa−1) 和低温度漂移 (0.014%/°C).

结论:

  • 拟议的石墨烯共振压力传感器有效抑制能量损失,并防止气体透.
  • 这种创新方法为使用二维材料的稳定,高性能压力传感提供了有前途的解决方案.
  • 传感器的增强灵敏度和稳定性使其适用于苛刻的应用.