Patent · US Active

Method and system for significantly improving charge probabilities of nanometer aerosol particles

US9863862B2 · kind B2 · utility

0Cited by
6References
16Claims
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Key dates

Filing dateMar 13, 2014
Grant dateJan 9, 2018
Priority date—
Expiry dateDec 10, 2034

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N2015/0046
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

The various embodiments described herein significantly increase charge probabilities of nanoparticles by first growing them to larger droplets using a diethylene glycol-based preconditioner, neutralizing the droplets with a bipolar charger, and then removing the condensed liquid to recover the original aerosol particles. The small droplet size is an important element in reducing the amount of aerosol particles with more than one charge. The high single-charge particle probability significantly enhances the monodisperse aerosol throughput of a DMA, while the reduced multiple charge probabilities ensure high monodispersity of DMA-classified aerosols and good data quality of SMPS measurements.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.