The High Charge Fraction of Flame-Generated Particles in the Size Range below 3 nm Measured by Enhanced Particle Detectors
Yang Wang,Juha Kangasluoma,Michel Attoui,Michel Attoui,Jiaxi Fang,Heikki Junninen,Markku Kulmala,Tuukka Petäjä,Pratim Biswas +8 more
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TLDR
In this article, 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).About:
This article is published in Combustion and Flame.The article was published on 2017-02-01 and is currently open access. It has received 32 citations till now. The article focuses on the topics: Particle & Particle size.read more
Citations
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Journal ArticleDOI
Soot inception: Carbonaceous nanoparticle formation in flames
TL;DR: In this paper, the authors reviewed the route by which gas-phase molecules in hydrocarbon flames form condensed-phase carbonaceous nanoparticles (incipient soot) and highlighted the physically stabilised soot inception as a possible "middle way".
Journal ArticleDOI
Soot inception: Carbonaceous nanoparticle formation in flames
TL;DR: In this paper , the authors reviewed the route by which gas-phase molecules in hydrocarbon flames form condensed-phase carbonaceous nanoparticles (incipient soot) and highlighted the physically stabilised soot inception as a possible "middle way".
Journal ArticleDOI
Overview of measurements and current instrumentation for 1–10 nm aerosol particle number size distributions
Juha Kangasluoma,Juha Kangasluoma,Runlong Cai,Runlong Cai,Jingkun Jiang,Chenjuan Deng,Dominik Stolzenburg,Dominik Stolzenburg,Lauri Ahonen,Tommy Chan,Yueyun Fu,Changhyuk Kim,Changhyuk Kim,Tiia Laurila,Ying Zhou,Lubna Dada,Juha Sulo,Richard C. Flagan,Markku Kulmala,Markku Kulmala,Tuukka Petäjä,Katrianne Lehtipalo,Katrianne Lehtipalo +22 more
TL;DR: In this article, the authors present a comprehensive uncertainty analysis for these methods that suggests that their present understanding on the sources of uncertainties quite well captures the observed deviations between different instruments in the size distribution measurements, and suggest guidelines for selecting suitable instruments for various applications.
Journal ArticleDOI
On the sources of uncertainty in the sub-3 nm particle concentration measurement
Juha Kangasluoma,Jenni Kontkanen +1 more
TL;DR: In this paper, the state-of-the-art DMA-CPC particle sizing system is examined with respect to counting statistics and the results highlight the importance of knowing the CPC d50 accurately to narrow down the particle concentration uncertainty.
Journal ArticleDOI
Influence of flame-generated ions on the simultaneous charging and coagulation of nanoparticles during combustion
TL;DR: In this paper, Fuchs' charging theory was coupled with a monodisperse particle growth model to study the simultaneous charging and coagulation of nanoparticles during combustion, and a high-resolution DMA was used to measure the mobilities of ions generated from a premixed flat flame operated at various conditions.
References
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Journal ArticleDOI
Aerosol classification by electric mobility: apparatus, theory, and applications
E.O. Knutson,Kenneth T. Whitby +1 more
TL;DR: An improved version of the Hewitt (differential) electric mobility analyzer was developed and its classifying characteristics were determined theoretically in this article, where the central mobility of the classified aerosol was found to be (qc + qm)/4πΛV, where qc and qm are the clean air and main outlet flows, respectively, and Λ is a geometric factor, and the center rod voltage.
Journal ArticleDOI
Role of sulphuric acid, ammonia and galactic cosmic rays in atmospheric aerosol nucleation
Jasper Kirkby,Joachim Curtius,Joao Almeida,Joao Almeida,Eimear M. Dunne,Jonathan Duplissy,Jonathan Duplissy,Jonathan Duplissy,Sebastian Ehrhart,Alessandro Franchin,Stephanie Gagne,Stephanie Gagne,Luisa Ickes,Andreas Kürten,Agnieszka Kupc,A. Metzger,Francesco Riccobono,Linda Rondo,Siegfried Schobesberger,Georgios Tsagkogeorgas,Daniela Wimmer,António Amorim,F. Bianchi,F. Bianchi,Martin Breitenlechner,A. David,Josef Dommen,Andrew J. Downard,Mikael Ehn,Richard C. Flagan,S. Haider,Armin Hansel,Daniel Hauser,Werner Jud,Heikki Junninen,Fabian Kreissl,Alexander N. Kvashin,Ari Laaksonen,Katrianne Lehtipalo,Jorge Lima,Edward R. Lovejoy,Vladimir Makhmutov,Serge Mathot,Jyri Mikkilä,Pierre Minginette,S. Mogo,Tuomo Nieminen,Antti Onnela,Paulo J. Pereira,Tuukka Petäjä,R. Schnitzhofer,John H. Seinfeld,Mikko Sipilä,Mikko Sipilä,Yuri Stozhkov,Frank Stratmann,António Tomé,Joonas Vanhanen,Yrjö Viisanen,Aron Vrtala,Paul E. Wagner,Hansueli Walther,Ernest Weingartner,Heike Wex,Paul M. Winkler,Kenneth S. Carslaw,Douglas R. Worsnop,Urs Baltensperger,Markku Kulmala +68 more
TL;DR: First results from the CLOUD experiment at CERN are presented, finding that atmospherically relevant ammonia mixing ratios of 100 parts per trillion by volume, or less, increase the nucleation rate of sulphuric acid particles more than 100–1,000-fold and ion-induced binary nucleation of H2SO4–H2O can occur in the mid-troposphere but is negligible in the boundary layer.
Journal ArticleDOI
Direct observations of atmospheric aerosol nucleation.
Markku Kulmala,Jenni Kontkanen,Heikki Junninen,Katrianne Lehtipalo,Hanna E. Manninen,Tuomo Nieminen,Tuomo Nieminen,Tuukka Petäjä,Mikko Sipilä,Siegfried Schobesberger,Pekka Rantala,Alessandro Franchin,Tuija Jokinen,Emma Järvinen,Mikko Äijälä,Juha Kangasluoma,Jani Hakala,P. P. Aalto,Pauli Paasonen,Jyri Mikkilä,Joonas Vanhanen,Juho Aalto,Hannele Hakola,Ulla Makkonen,Taina Ruuskanen,Roy L. Mauldin,Roy L. Mauldin,Jonathan Duplissy,Hanna Vehkamäki,Jaana Bäck,Aki Kortelainen,Ilona Riipinen,Theo Kurtén,Murray V. Johnston,James N. Smith,James N. Smith,Mikael Ehn,Mikael Ehn,Thomas F. Mentel,Kari E. J. Lehtinen,Kari E. J. Lehtinen,Ari Laaksonen,Ari Laaksonen,Veli-Matti Kerminen,Douglas R. Worsnop +44 more
TL;DR: Three separate size regimes below 2-nm diameter are identified that build up a physically, chemically, and dynamically consistent framework on atmospheric nucleation—more specifically, aerosol formation via neutral pathways.
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