Detection of Bioaerosols using Single Particle Thermal Emission Spectroscopy
Abstract
This report documents current finding for an ongoing study designed to assess the ability to measure in situ the absorption spectra from a single bio-aerosol particle. In particular, we describe experimental method(s) and techniques capable of detecting the single particle thermal emission in the infrared (IR) spectral range from 3 to 12 microns. We report current findings to accurately measure the graybody spectral emission from a 1-20 micron-size bioparticle when heated to temperatures in excess of a 100 deg C. Prevailing theory suggests a strong link between thermal emission and absorption spectra for bulk materials held at elevated temperatures. This study (1) establishes whether it is possible to measure and spectrally resolve the thermal emission from a small optically heated aerosol-type particle, and (2) determines the functional relationship(s) that couple the measured thermal emission with actual absorption.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2013
- Accession Number
- ADA579500
Entities
People
- Kristan P. Gurton
- Melvin Felton
- Pan Yongle
Organizations
- United States Army Research Laboratory