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K-State Today

November 15, 2019

Scientist to present physics colloquium on Nov. 18

Submitted by Kim Coy

Yong-Le Pan, research physicist at Environmental Sensing Branch, CISD, CCDC-Army Research Laboratory, will present a physics colloquium highlighting real-time detection and characterization of biological and chemical aerosol particles at a trace level in the atmosphere. The lecture will be from 4:30-5:30 p.m. Monday, Nov. 18, in 102 Cardwell Hall.

Atmospheric aerosol particles play an important role in climate and health. Detection and characterization of aerosol particles, especially the particular particles such as these formed by biological and chemical agents, has become increasingly important for a wide variety of research communities and scientific questions in both outdoor and indoor environments.

This talk will focus on the development of real-time, in-situ aerosol detection and characterization systems at CCDC-ARL, mainly based on single micron-sized particle fluorescence spectra, two-dimensional angular optical scattering patterns, and Raman spectroscopy, including the recent work on laser-trapping system for airborne aerosol particles, and the new results from time- and position-resolved Raman spectroscopy of single laser-trapped airborne particles.