Physical and chemical study of single aerosol particles using optical trapping cavity ringdown spectroscopy
Technical Report,01 Sep 2013,31 Aug 2016
Mississippi State University Mississippi State United States
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We report a new single-aerosol particle scope using an optical trapping-cavity ringdown spectroscopy OT-CRDS technique. The scope can not only view physical parameters such as size, motion, restoring force constant of a single aerosol particle trapped in air, but also display time-, particle-, or wavelength-resolved chemical properties such as single aerosol particle extinction. We demonstrate the scope by trapping and walking single carbon-nanotube particles of approx.50 micrometers m in size and viewing those properties via changes of ringdown time. This single-aerosol particle scope offers a new, powerful tool to study both physical and chemical properties as well as their evolving dynamics.
- Atomic and Molecular Physics and Spectroscopy
- Physical Chemistry