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Differential diffusion analyzer

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)1429-1437
JournalAerosol Science and Technology
Issue number12
Early online date7 Sep 2017
Publication statusPublished - 2017
Publication typeA1 Journal article-refereed


In this article, a proof of concept of a new measurement instrument, differential diffusion analyzer (DDA), is established. The DDA enables the measurement of the size distribution of sub-10 nm aerosol particles, and it can also be used as a size classifier to separate a certain particle size from a size distribution for subsequent analysis. The developed technique is based on the diffusion separation of different size particles. Thus, the main advantage of the DDA compared to other methods is that particle charging is not required. Simulated and experimentally measured transmission efficiencies show that the diffusion-based differential size classification is a feasible concept, and moreover, shows that particle size is inversely proportional to the square root of the total flow rate.

Publication forum classification

Field of science, Statistics Finland