Application of a multistep condensation nuclei counter as a detector for particle surface composition

R. Niessner, C. Helsper

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

To obtain information on the chemical nature and physical properties of particle surface, a method has been developed, which is based on the influence of particle surface on the condensation process. An electrostatic classifier is used to generate a monodisperse aerosol of known electrical mobility diameter. The Kelvin-equivalent diameter of this aerosol is then determined using a simple Nolan-Pollak-type condensation nuclei counter which has been modified to run automatically through a series of different water vapour supersaturations. First applications on coated and uncoated particles (e.g. H2SO4 n-HD vs H2SO4 of the same electrical mobility diameter show that the water condensation process reacts rather sensitive to the changed surface composition.

Original languageEnglish
Pages (from-to)201-209
Number of pages9
JournalJournal of Aerosol Science
Volume16
Issue number3
DOIs
StatePublished - 1985
Externally publishedYes

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