Detection of Bioaerosols using Single Particle Thermal Emission Spectroscopy

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 in...

Full description

Saved in:
Bibliographic Details
Main Authors: Gurton, Kristan P, Felton, Melvin, Yongle, Pan
Format: Report
Language:English
Subjects:
ABSORPTION
ABSORPTION SPECTRA
ANTHRAX
Atomic and Molecular Physics and Spectroscopy
BIOLOGICAL AEROSOLS
BIOLOGICAL WARFARE AGENTS
BIOLOGICAL WEAPONS
CHEMICAL WARFARE AGENTS
CHEMICAL WEAPONS
Chemical, Biological and Radiological Warfare
DRI(DIRECTORS RESEARCH INITIATIVE)
EMISSION
PARTICLES
SINGLE PARTICLE
SPECTRAL EMITTANCE
SPECTROSCOPY
THERMAL EMISSION
THERMAL RADIATION
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. The original document contains color images.