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Probing PM2.5 with terahertz wave

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Abstract

The goal of continuous ambient participate monitoring has been accomplished by the use of terahertz (THz) wave. The frequency-dependent spectrum and absorbance of the particulate matter (PM2.5) were measured in the range of 0–10 THz. The PM2.5 concentration ρ was calculated according to the sampling time and air flow. With the increase of ρ, the THz wave amplitude gradually decreased and the absorbance A of PM2.5 increased. The relationship between r and A can be described mathematically through ρ ∝ A 0.5. Our results demonstrate that the terahertz wave could be a valuable tool to monitor and inspect the PM2.5 concentration.

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Authors and Affiliations

  1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, 102249, China

    Qian Li & Kun Zhao

  2. Key Laboratory of Oil and Gas Terahertz Spectroscopy and Photoelectric Detection, China Petroleum and Chemical Industry Federation (CPCIF), Beijing, 100723, China

    Qian Li & Kun Zhao

  3. Beijing Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing, 102249, China

    Kun Zhao

  4. Department of Physics, Capital Normal University, Beijing, 100048, China

    LeiWei Zhang, ZhenWei Zhang & CunLin Zhang

  5. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China

    Chuan Liang & DongHai Han

Authors
  1. Qian Li
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  2. Kun Zhao
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  3. LeiWei Zhang
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  4. Chuan Liang
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  5. ZhenWei Zhang
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  6. CunLin Zhang
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  7. DongHai Han
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Corresponding author

Correspondence to Kun Zhao.

Additional information

Recommended by JIN KuiJuan (Associate Editor)

These authors contributed equally to this work

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Li, Q., Zhao, K., Zhang, L. et al. Probing PM2.5 with terahertz wave. Sci. China Phys. Mech. Astron. 57, 2354–2356 (2014). https://doi.org/10.1007/s11433-014-5569-z

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  • DOI: https://doi.org/10.1007/s11433-014-5569-z

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