NMP 2008
 |
CHONGAI KUANG |
ADVISOR:
Alon McCormick |
Recent Progress in the Detection of Gas-Borne Nanoparticles
Methods
for measuring sizes and concentrations of gas-borne particles larger than
3 nm are now well established. Measurements of nanoparticles and molecular
clusters smaller than this are needed to better understand rates and mechanisms
of particle nucleation from the gas phase. Such nucleation processes are
important in the synthesis of novel materials in aerosol reactors. Nucleation
from the gas phase also occurs in the atmosphere and is a significant source
of particles that serve as cloud condensation nuclei. This talk will describe
new approaches for "bridging the gap" in measurements from molecules,
to neutral molecular clusters, nanoparticles and beyond. Chemical ionization
mass spectrometry is being used to measure molecular clusters with masses
up to about 1000 amu. Condensation under controlled conditions is being used
to detect nanoparticles smaller than that.
Read Chongai Kuang's current CV.