The goal of continuous ambient participate monitoring has been accomplished by the use of terahertz （THz） wave. The fre- quency-dependent spectrum and absorbance of the particulate matter （PM2.5） were measured in ...The goal of continuous ambient participate monitoring has been accomplished by the use of terahertz （THz） wave. The fre- quency-dependent spectrum and absorbance of the particulate matter （PM2.5） were measured in the range of 0-10 THz. The PM2.5 concentration ,o was calculated according to the sampling time and air flow. With the increase of ,o, the THz wave am- plitude gradually decreased and the absorbance A of PM2.5 increased. The relationship between p and A can be described mathematically through p∝ A0.5. Our results demonstrate that the terahertz wave could be a valuable tool to monitor and in- spect the PM2.5 concentration.展开更多
基金supported by the Specially Funded Program on National Key Scientific Instruments and Equipment Development(Grant No.2012YQ140005)the National Key Basic Research Program of China(Grant No.2014CB744302)the Beijing National Science Foundation(Grant No.4122064)
文摘The goal of continuous ambient participate monitoring has been accomplished by the use of terahertz （THz） wave. The fre- quency-dependent spectrum and absorbance of the particulate matter （PM2.5） were measured in the range of 0-10 THz. The PM2.5 concentration ,o was calculated according to the sampling time and air flow. With the increase of ,o, the THz wave am- plitude gradually decreased and the absorbance A of PM2.5 increased. The relationship between p and A can be described mathematically through p∝ A0.5. Our results demonstrate that the terahertz wave could be a valuable tool to monitor and in- spect the PM2.5 concentration.
