The condensation particle counter battery (CPCB): a new tool to investigate the activation properties of nanoparticles

Markku Kulmala, Genrik Mordas, Tuukka Petäjä, Tiia Grönholm, Pasi P Aalto, Hanna Vehkamäki, Anca I Hienola, Erik Herrmann, Mikko Juhani Sipilä, Ilona Riipinen, Hanna E Manninen, Kaarle Hämeri, Frank Stratmann, Merete Bilde, Paul M Winkler, Wolfram Birmili, Paul E Wagner

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    "The formation and growth of fresh atmospheric aerosol particles was investigated using a condensation particle counter battery (CPCB). This instrument is a matrix Of four separate CPCs, which differ in the combination of both cut-off size and working liquid (water; n-butanol). In a first step, the CPC counting efficiencies and cut-off sizes were carefully characterised under laboratory conditions for different condensing vapours, temperature differences between condenser and saturator, and test aerosol types. In addition, the activation process wits described theoretically, and modelled numerically for the given CPC configurations. These results confirmed that water-soluble and water-insoluble as well as butanol-soluble and butanol-insoluble aerosol particles may be discriminated in the CPCB through different activation diameters. Therefore, the CPCB represents a novel tool to infer information on the chemical composition of aerosol particles between 2 and 20 nm. To test the applicability of the CPCB tinder field conditions, the CPCB was operated at a rural background station in Finland (Hyytiata) in April and May 2005. The results indicate that growing nucleation mode particles were water-soluble both at 3 and 11 nm. (c) 2006 Elsevier Ltd. All rights reserved."
    Original languageEnglish
    JournalJournal of Aerosol Science
    Volume38
    Issue number3
    Pages (from-to)289-304
    Number of pages16
    ISSN0021-8502
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

    Fields of Science

    • 114 Physical sciences

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