The high charge fraction of flame-generated particles in the size range below 3 nm measured by enhanced particle detectors

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http://hdl.handle.net/10138/307935

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Wang , Y , Kangasluoma , J , Attoui , M , Fang , J , Junninen , H , Kulmala , M , Petäjä , T & Biswas , P 2017 , ' The high charge fraction of flame-generated particles in the size range below 3 nm measured by enhanced particle detectors ' , Combustion and Flame , vol. 176 , pp. 72-80 . https://doi.org/10.1016/j.combustflame.2016.10.003

Title: The high charge fraction of flame-generated particles in the size range below 3 nm measured by enhanced particle detectors
Author: Wang, Yang; Kangasluoma, Juha; Attoui, Michel; Fang, Jiaxi; Junninen, Heikki; Kulmala, Markku; Petäjä, Tuukka; Biswas, Pratim
Contributor organization: Department of Physics
Date: 2017-02
Language: eng
Number of pages: 9
Belongs to series: Combustion and Flame
ISSN: 0010-2180
DOI: https://doi.org/10.1016/j.combustflame.2016.10.003
URI: http://hdl.handle.net/10138/307935
Abstract: Charging in flames significantly affects the properties of the resultant particles produced because of its influence in almost all stages of particle formation. The charging characteristics of flame-generated sub 3 nm particles were investigated with three enhanced particle detectors including a high resolution differential mobility analyzer (DMA) coupled with an electrometer, a particle size magnifier coupled with a butanol-based condensation particle counter (PSM-bCPC), and an atmospheric pressure interface time-of-flight mass spectrometer (APi-TOF). Up to 95% of the flame-generated sub-3 nm particles were charged at a sampling height of 5 mm above the burner, indicating the existence of a strong ionization process in the investigated flame. This high fraction of charged particles contradicts the classical charging theories, which predict
Subject: Flame synthesis
Charge fraction
Sub-3 nm particle
Titanium dioxide
Differential mobility analyzer
Mass spectrometry
ATMOSPHERIC AEROSOL NUCLEATION
DIFFERENTIAL MOBILITY ANALYSIS
HIGH-RESOLUTION MOBILITY
DETAILED ION CHEMISTRY
METHANE-OXYGEN FLAMES
NEGATIVE-IONS
SULFURIC-ACID
SOOT PARTICLES
MASS-SPECTROMETER
PREMIXED FLAMES
114 Physical sciences
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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