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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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doi:10.5194/amt-2016-408
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
17 Jan 2017
Review status
A revision of this discussion paper was accepted for the journal Atmospheric Measurement Techniques (AMT) and is expected to appear here in due course.
Characterization of three new condensation particle counters for sub-3 nm particle detection: ADI versatile water CPC, TSI 3777 nano enhancer and boosted TSI 3010
Juha Kangasluoma1, Susanne Hering2, David Picard3, Gregory Lewis2, Joonas Enroth1, Frans Korhonen1, Markku Kulmala1, Karine Sellegri3, Michel Attoui1,4, and Tuukka Petäjä1 1Department of Physics, P.O. Box 64, 00014, University of Helsinki, Helsinki, Finland
2Aerosol Dynamics Inc., Berkeley, CA, USA
3Laboratoire de Météorologie Physique, UMR6016, Observatoire de Physique du Globe de Clermont - Ferrand, CNRS – Université Blaise Pascal, Clermont - Ferrand, France
4University Paris Est Creteil, University Paris - Diderot, LISA, UMR CNRS 7583, France
Abstract. The scientific need to understand nanoparticle dynamics at sizes below 3 nm has pushed companies to develop commercial solutions to measure particles down to 1 nm. In this study we characterize the performance of three new particle counters able to detect particles smaller than 3 nm: Aerosol Dynamics Inc versatile water condensation particle counter (v-WCPC, ADI, Berkeley, USA), TSI 3777 nano enhancer (TSI Inc., Shoreview, USA) and modified and boosted 3010 type CPC from Clermont Ferrand University called as B3010. The 3777 and v-WCPC were characterized using tungsten oxide test particles with all charging states: negative, positive and neutral, and with positively charged tetradodecylammonium bromide. The detection efficiencies of the particle counters were measured with two different temperature settings: low temperature difference settings so that the CPCs did not detect any ions from a radioactive source; and high temperature difference settings so that the supersaturation was at the onset of homogeneous nucleation for the 3777, or confined within the range of liquid water for the ADI v-WCPC. The measured 50 % detection diameters (d50) were in the range of 1.3–2.4 nm for the tungsten oxide particles depending on the particle charging state and CPC temperature settings, and between 2.5 and 3.3 nm for the organic test aerosol for the 3777 and v-WCPC. The d50s were measured for the B3010 with negatively charged tungsten oxide particles with four different inlet flow rates. The v-WCPC and 3777 were also compared side by side by measuring atmospheric aerosol, exhibiting an excellent agreement.

Citation: Kangasluoma, J., Hering, S., Picard, D., Lewis, G., Enroth, J., Korhonen, F., Kulmala, M., Sellegri, K., Attoui, M., and Petäjä, T.: Characterization of three new condensation particle counters for sub-3 nm particle detection: ADI versatile water CPC, TSI 3777 nano enhancer and boosted TSI 3010, Atmos. Meas. Tech. Discuss., doi:10.5194/amt-2016-408, in review, 2017.
Juha Kangasluoma et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'Reviewer comment', Anonymous Referee #1, 27 Jan 2017 Printer-friendly Version 
 
RC2: 'review', Anonymous Referee #3, 14 Feb 2017 Printer-friendly Version 
 
AC1: 'Response to review', Juha Kangasluoma, 10 Apr 2017 Printer-friendly Version Supplement 
Juha Kangasluoma et al.
Juha Kangasluoma et al.

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Short summary
The manuscript presents characterization of three new particle counters able to detect airborne nanoparticles smaller than three nanometers in diameter. We explored some of the parameters affecting the smallest detectable particle size, such as sample flow relative humidity, the particle chemical composition and electrical charging state. The characterization results help one to select a suitable particle counter for a given application.
The manuscript presents characterization of three new particle counters able to detect airborne...
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