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ELEMENTAL COMPOSITION OF FRESHLY NUCLEATED PARTICLES
Description:
The main objective of this work is to develop a method for real-time sampling and analysis of individual airborne nanoparticles in the 5 - 20 nm diameter range. The size range covered by this method is much smaller than existing single particle methods for chemical analysis. Since particles in this size range are close to their origin, chemical composition measurements should provide greater insight into particle formation mechanisms.
Record Details:
Record Type:PROJECT(
ABSTRACT
)
Start Date:01/01/2002
Completion Date:12/31/2004
Record ID:
54414
Keywords:
NANOPARTICLES, NUCLEATION, AMBIENT AIR, PARTICULATES, ANALYTICAL, MEASUREMENT METHODS,
Related Organizations:
Role
:OWNER
Organization Name
:UNIVERSITY OF DELAWARE
Citation
:Newark
State
:DE
Zip Code
:19716
Project Information:
Approach
:Nanoparticles will be classified by elemental composition using aerosol mass spectrometry. The aerosol will be drawn directly into a mass spectrometer where individual particles are analyzed in real time by laser ablation. To increase the sampling efficiency for particles in the 5 -20 nm diameter range, a quadrupole ion guide will be used to focus particles into the ablation laser beam path. Quantitative measurements of elemental composition will be achieved by complete atomization and ionization of individual particles using a high energy laser pulse to create a nano-plasma. This method will be used to study a variety of particle formation processes. While laboratory investigations are emphasized in this work, the instrumentation will be suitable for field experiments.
Cost
:$390,000.00
Research Component
:Nanotechnology
Project IDs:
ID Code
:R829622
Project type
:EPA Grant