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Title: Detection near 1-nm with a laminar-flow, water-based condensation particle counter

Abstract

Presented is a laminar-flow, water-based condensation particle counter capable of particle detection near 1 nm. This instrument employs a three-stage, laminar-flow growth tube with a “moderator” stage that reduces the temperature and water content of the output flow without reducing the peak supersaturation, and makes feasible operation at the large temperature differences necessary for achieving high supersaturations. The instrument has an aerosol flow of 0.3 L/min, and does not use a filtered sheath flow. It is referred to as a “versatile” water condensation particle counter, or vWCPC, as operating temperatures can be adjusted in accordance with the cut-point desired. When operated with wall temperatures of ~2°C, >90°C, and ~22°C for the three stages, respectively, the vWCPC detects particles generated from a heated nichrome wire with a 50% efficiency cut-point near 1.6 nm mobility diameter. At these operating temperatures, it also detects 10–20% of large molecular ions formed from passing filtered ambient air through a bipolar ion source. Decreasing the temperature difference between the first two stages, with the first and second stages operated at 10 and 90°C, respectively, essentially eliminates the response to charger ions, and raises the 50% efficiency cut-point for the nichrome wire particles to 1.9 nm mobilitymore » diameter. Here, the time response, as measured by rapid removal of an inlet filter, yields a characteristic time constant of 195 ms.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [3]
  1. Aerosol Dynamics Inc., Berkeley, CA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Lisa Univ. Paris Est Creteil, Paris (France)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1350916
Report Number(s):
BNL-113749-2017-JA
Journal ID: ISSN 0278-6826; R&D Project: 2016-BNL-EE630EECA-Budg; KP1701000
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Aerosol Science and Technology
Additional Journal Information:
Journal Volume: 51; Journal Issue: 3; Journal ID: ISSN 0278-6826
Publisher:
American Association for Aerosol Research
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; nanoparticles; condensation particle counting; growth tube

Citation Formats

Hering, Susanne V., Lewis, Gregory S., Spielman, Steven R., Eiguren-Fernandez, Arantzazu, Kreisberg, Nathan M., Kuang, Chongai, and Attoui, Michel. Detection near 1-nm with a laminar-flow, water-based condensation particle counter. United States: N. p., 2016. Web. doi:10.1080/02786826.2016.1262531.
Hering, Susanne V., Lewis, Gregory S., Spielman, Steven R., Eiguren-Fernandez, Arantzazu, Kreisberg, Nathan M., Kuang, Chongai, & Attoui, Michel. Detection near 1-nm with a laminar-flow, water-based condensation particle counter. United States. doi:10.1080/02786826.2016.1262531.
Hering, Susanne V., Lewis, Gregory S., Spielman, Steven R., Eiguren-Fernandez, Arantzazu, Kreisberg, Nathan M., Kuang, Chongai, and Attoui, Michel. Fri . "Detection near 1-nm with a laminar-flow, water-based condensation particle counter". United States. doi:10.1080/02786826.2016.1262531. https://www.osti.gov/servlets/purl/1350916.
@article{osti_1350916,
title = {Detection near 1-nm with a laminar-flow, water-based condensation particle counter},
author = {Hering, Susanne V. and Lewis, Gregory S. and Spielman, Steven R. and Eiguren-Fernandez, Arantzazu and Kreisberg, Nathan M. and Kuang, Chongai and Attoui, Michel},
abstractNote = {Presented is a laminar-flow, water-based condensation particle counter capable of particle detection near 1 nm. This instrument employs a three-stage, laminar-flow growth tube with a “moderator” stage that reduces the temperature and water content of the output flow without reducing the peak supersaturation, and makes feasible operation at the large temperature differences necessary for achieving high supersaturations. The instrument has an aerosol flow of 0.3 L/min, and does not use a filtered sheath flow. It is referred to as a “versatile” water condensation particle counter, or vWCPC, as operating temperatures can be adjusted in accordance with the cut-point desired. When operated with wall temperatures of ~2°C, >90°C, and ~22°C for the three stages, respectively, the vWCPC detects particles generated from a heated nichrome wire with a 50% efficiency cut-point near 1.6 nm mobility diameter. At these operating temperatures, it also detects 10–20% of large molecular ions formed from passing filtered ambient air through a bipolar ion source. Decreasing the temperature difference between the first two stages, with the first and second stages operated at 10 and 90°C, respectively, essentially eliminates the response to charger ions, and raises the 50% efficiency cut-point for the nichrome wire particles to 1.9 nm mobility diameter. Here, the time response, as measured by rapid removal of an inlet filter, yields a characteristic time constant of 195 ms.},
doi = {10.1080/02786826.2016.1262531},
journal = {Aerosol Science and Technology},
number = 3,
volume = 51,
place = {United States},
year = {2016},
month = {11}
}

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Works referenced in this record:

A Method for Particle Size Amplification by Water Condensation in a Laminar, Thermally Diffusive Flow
journal, May 2005

  • Hering, Susanne; Stolzenburg, Mark
  • Aerosol Science and Technology, Vol. 39, Issue 5, p. 428-436
  • DOI: 10.1080/027868290953416

An Ultrafine Aerosol Condensation Nucleus Counter
journal, January 1991

  • Stolzenburg, Mark; McMurry, Peter
  • Aerosol Science and Technology, Vol. 14, Issue 1, p. 48-65
  • DOI: 10.1080/02786829108959470