[Zurück]

J. Ofner, T. Deckert-Gaudig, K.A. Kamilli, A. Held, J. Lohninger, V. Deckert, B. Lendl:
"Tip-Enhanced Raman Spectroscopy of Atmospherically Relevant Aerosol Nanoparticles";
Analytical Chemistry, 88 (2016), S. 9766 - 9772.

Atmospheric aerosol nanoparticles play a major
role in many atmospheric processes and in particular in the
global climate system. Understanding their formation by
homogeneous or heterogeneous nucleation as well as their
photochemical aging and atmospheric transformation is of
utmost importance to evaluate their impact on atmospheric
phenomena. Single particle analysis like tip-enhanced Raman
spectroscopy (TERS) opens access to a deeper understanding
of these nanoparticles. Atmospherically relevant nanoparticles,
formed above a simulated salt lake inside an aerosol smogchamber,
were analyzed using TERS. TERS spectra of 11
nanoparticles were studied in detail. First results of TERS on atmospherically relevant aerosol nanoparticles reveal the presence
of inorganic seed particles, a chemical diversity of equally sized particles in the nucleation mode, and chemical transformation
during photochemical aging. Therefore, single particle analysis by optical near-field spectroscopy such as TERS of atmospheric
nanoparticles will significantly contribute to elucidate atmospheric nucleation, photochemical aging, and chemical transformation
processes by uncovering single particle based properties.

http://dx.doi.org/10.1021/acs.analchem.6b02760