Optical Characterization of Coated Soot Aerosols or "Flames and Laser"
- Sandia National Laboratories
- 2005 – 2006
The optical properties of coated soot aerosols produce the greatest uncertainty in climate change models. This project aims to measure the scattering and absorption of light by sub-micron-sized soot particles similar to those produced in diesel exhaust. Total absorption and scattering cross sections of 635 nm laser light are measured using cavity-ringdown and angle-resolved scattering techniques. Soot particles are created in situ by partially combusting ethylene and coated with a volatile organic compound.