TY - T1 - Quantum Chemical Studies on Tropospheric Nucleation Mechanisms Involving Sulfuric Acid SN - / UR - URN:ISBN:978-952-5027-83-9; http://hdl.handle.net/10138/23260 T3 - A1 - Kurtén, Theo A2 - PB - Helsingin yliopisto Y1 - 2007 LA - eng AB - Nucleation is the first step of the process by which gas molecules in the atmosphere condense to form liquid or solid particles. Despite the importance of atmospheric new-particle formation for both climate and health-related issues, little information exists on its precise molecular-level mechanisms. In this thesis, potential nucleation mechanisms involving sulfuric acid together with either water and ammonia or reactive biogenic molecules are studied using quantum chemical methods. Quantum che... VO - IS - SP - OP - KW - fysiikka N1 - PP - ER -