Related Experiment Video
Updated: Jul 17, 2026

Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals
Published on: December 11, 2013
Rapid formation of sulfuric acid particles at near-atmospheric conditions
Torsten Berndt1, Olaf Böge, Frank Stratmann
1Leibniz-Institut für Troposphärenforschung e.V., Permoserstrasse 15, 04318 Leipzig, Germany. berndt@tropos.de
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.
Related Concept Videos
Formation of Complex Ions
Precipitate Formation and Particle Size Control
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
Precipitation Processes
Colloidal precipitates
Atomic Absorption Spectroscopy: Atomization Methods
The Colloidal State

