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相关概念视频

Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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基于空洞波导的光感应热弹性光谱检测.

Weipeng Chen, Shunda Qiao, Ziting Lang

    Optics letters
    |August 1, 2023
    PubMed
    概括

    一个基于空洞波导 (HWG) 的新型光诱导热弹性光谱 (LITES) 传感器提供了灵敏的气体检测. 这种HWG-LITES系统实现了对乙和一氧化碳的最低检测极限.

    科学领域:

    • 频谱学是一种光谱学.
    • 光学工程是指光学工程.
    • 环境科学 环境科学

    背景情况:

    • 气体传感技术对于环境监测和工业安全至关重要.
    • 传统的方法,如多通道细胞 (MPC) 和空心反共振纤维 (HC-ARF),在尺寸,稳定性和光学合方面都有局限性.
    • 需要紧,稳定和高效的气体传感平台.

    研究的目的:

    • 提出和演示一种新型的气体传感系统,使用与光诱导热弹性光谱学 (LITES) 集成的空洞波导 (HWG).
    • 评估基于HWG的LITES传感器在近红外和中红外区域检测乙 (C2H2) 和一氧化碳 (CO) 的性能.
    • 为了比较HWG平台与传统气体传感细胞的优势.

    主要方法:

    • 长65厘米,内径4毫米的HWG被银膜覆盖,被用作气室和光传输介质.
    • 两个激光源,二极管激光器 (1.53微米) 和量子级联激光器 (4.58微米),用于激发.
    • 通过分析目标气体对激光吸收的热弹性反应来进行光诱导热弹性光谱学 (LITES).

    主要成果:

    • 基于HWG的LITES传感器对不同度的乙 (C2H2) 和一氧化碳 (CO) 呈现出极好的线性响应.
    • 达到的最小检测极限 (MDL) 为C2H2的6.07ppm,而CO的98.66ppb.

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  • 在MPC和HC-ARF相比,HWG平台展示了优势,包括更小的尺寸,更简单的结构,更快的填充,更容易的光学合,以及更高的系统稳定性.

    • 结论:

    • 空洞波导 (HWG) 是用于光诱导热弹性光谱 (LITES) 气体传感的高效平台.
    • 开发的HWG-LITES传感器为检测C2H2和CO等关键气体提供了高灵敏度和线性响应.
    • 由于其性能和实用优势,该技术为现有的气体传感方法提供了有希望的替代方案.