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. 2005 Feb 4;307(5710):698-700.
doi: 10.1126/science.1104054.

Rapid formation of sulfuric acid particles at near-atmospheric conditions

Torsten Berndt  1 , Olaf Böge, Frank Stratmann, Jost Heintzenberg, Markku Kulmala
Affiliations

Rapid formation of sulfuric acid particles at near-atmospheric conditions

Torsten Berndt et al. Science. .

Abstract

We investigated the formation of new particles in a laboratory study, starting from H2SO4 produced in situ through the reaction of OH radicals with SO2. Newly formed particles were observed for H2SO4 concentrations above 7 x 10(6) per cubic centimeter. At 293 kelvin, a rough estimate yielded a nucleation rate of 0.3 to 0.4 particles per cubic centimeter per second for approximately 10(7) particles per cubic centimeter of H2SO4 (particle size >/= 3 nanometers). These findings are in agreement with observations from the atmosphere. The results demonstrate that under laboratory conditions similar to the atmosphere, particle formation occurs at atmospheric H2SO4 concentration levels.

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