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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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相关实验视频

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Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
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一个染料敏感的传感器用于在可见光下检测氧气.

Lionel Wettstein1, Julia Specht1, Vera Kesselring1

  • 1Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich, 8093, Switzerland.

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概括

这项研究介绍了一种新型的化学阻抗传感器,用于在室温下快速实时检测氧气. 该设备采用独特的混合材料,为各种应用提供高灵敏度和选择性.

关键词:
碳纳米管是如何使用的化学 阻力传感器氧气 氧气 氧气 氧气光敏化剂的光敏化剂.复合物是复合物的.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学传感器 化学传感器
  • 纳米技术 纳米技术

背景情况:

  • 准确的实时氧气 (O2) 监测对于健康,环境和工业应用至关重要.
  • 现有的传感器在灵敏度,响应时间或操作条件上往往面临限制.

研究的目的:

  • 为快速检测氧气开发一款高性能化学阻抗传感器.
  • 为了利用染料敏感太阳能电池的原理来设计传感器.
  • 为了在室温下实现灵敏和选择性的氧气传感.

主要方法:

  • 制造一个单壁碳纳米管-泰坦尼亚混合物 (SWCNT-TiO2) 材料.
  • 加入一个基于分子 (Re) 的光敏感剂.
  • 使用光诱导的电荷转移来检测氧气.

主要成果:

  • 该SWCNT-TiO2-Re复合体传感器表现出对每十亿分之一 (ppb) 的氧气水平的敏感性.
  • 实现了快速和可逆的化学抵抗反应.
  • 在干扰剂,耐湿度和稳定性上对O2具有很高的选择性.

结论:

  • 开发的传感器为氧气传感提供了强大,快速和低功耗的解决方案.
  • 将光采集概念转化为实际的传感技术.
  • 显示了需要精确氧气监测的各种应用的潜力.