The Dust Library: Enhanced Infrared Spectra of Individual Respirable Dust Particles



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45th International Conference on Environmental Systems


The Coe Group has used plasmonic metal films with arrays of microholes to capture particles and record scatter-free infrared absorption spectra of individual dust particles of a specific size and narrow size distribution using imaging infrared Fourier transform microscopy. The spectra are scatter-free in spite of the fact that these particles are smaller than the probing wavelengths of light. Dust particles of ~4 m size have been collected from different environments, including data from our laboratory air, a household filter, the World Trade Center 9/11/2001 event, and the International Space Station. Particles of this size are among the largest that are inhaled into people’s lungs, so there is much interest in the chemical composition of these particles considering that increasing particulate concentrations are known to be correlated with deterioration of human health. In addition to samples from various environments, the dust library now includes the spectra of single particles of calibrants, i.e. pure components known to be in the dust which enables the development of quantitative analytical models for composition.


Bellevue, Washington
Antriksh Luthra, The Ohio State University, Dept. of Mechanical and Aerospace Engineering, USA
Aruna Ravi, The Ohio State University, Dept. of Electrical and Computer Science Engineering, USA
James V. Coe, The Ohio State University, Dept. of Chemistry and Biochemistry, USA
The 45th International Conference on Environmental Systems was held in Bellevue, Washington, USA on 12 July 2015 through 16 July 2015.