Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Spectroscopy, a toolbox for structural information on aerosol particles
Document related concepts
Transcript
Spectroscopy, a toolbox for structural information on aerosol particles Ruth Signorell Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, CH-8093 Zurich, Switzerland [email protected] It is well known that light interacts differently with small particles compared with bulk materials or gas phase molecules, producing spectral signatures that strongly depend on particle properties, such as size, shape, or architecture. Even nanosized aerosol particles held together by weak intermolecular interactions can exhibit such characteristic spectral signatures. This talk discusses absorption and scattering features in aerosol particle spectra from the infrared to the extreme ultraviolet spectral region, and explains their molecular origin and their use for aerosol characterization in planetary atmospheres. Various laboratory methods are discussed ranging from particle ensemble techniques to single-particle studies in optical traps. The role of small clusters as critical nuclei in the aerosol formation from the gas phase is briefly addressed.
