Investigation of chemical agitations on single chemical and biological aerosol particles in air using optical trapping-Raman spectroscopy (Atmospheric Sciences)
Abstract
The objective of the proposed work is to investigate single aerosol and bio-aerosol particle gas-phase heterogeneous chemistry using Optical Trapping Raman Spectroscopy (OT-RS). The investigators will use photophoretic force (PPF) or/and radiation pressure force (RPF) to trap single particles. The particle models to be used are non-absorbing solid oxides and light-absorbing bioaerosol particles. Once trapped the particles will be subject to external agitations of molecular gas or droplets. Raman Spectroscopy will be used to characterize the aerosols and the subsequent reaction progress in time. While some of the external agitation molecular gases and the aerosol chemistry is thought to be well understood, the main objective is to follow how the single particle morphology drives the chemistry and reactivity at the aerosol surface. This type of information is critical in understanding atmospheric mechanisms that involve aerosol and gas-phase heterogeneous chemistry.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 27, 2017
- Source ID
- W911NF1610483
Entities
People
- Chuji Wang
Organizations
- Army Contracting Command
- Mississippi State University
- United States Army