C
Chao Yan
Researcher at University of Helsinki
Publications - 150
Citations - 5612
Chao Yan is an academic researcher from University of Helsinki. The author has contributed to research in topics: Aerosol & Chemistry. The author has an hindex of 31, co-authored 107 publications receiving 3322 citations. Previous affiliations of Chao Yan include Carnegie Mellon University & Helsinki Institute of Physics.
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Journal ArticleDOI
Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation
Carla Frege,Ismael K. Ortega,Matti P. Rissanen,Arnaud P. Praplan,Gerhard Steiner,Gerhard Steiner,Gerhard Steiner,Martin Heinritzi,Lauri Ahonen,António Amorim,Anne-Kathrin Bernhammer,F. Bianchi,F. Bianchi,Sophia Brilke,Sophia Brilke,Sophia Brilke,Martin Breitenlechner,Martin Breitenlechner,Lubna Dada,A.A. Dias,Jonathan Duplissy,Jonathan Duplissy,Sebastian Ehrhart,Sebastian Ehrhart,Imad El-Haddad,Lukas Fischer,Claudia Fuchs,Olga Garmash,Marc Gonin,Armin Hansel,Christopher R. Hoyle,Tuija Jokinen,Heikki Junninen,Heikki Junninen,Jasper Kirkby,Jasper Kirkby,Andreas Kürten,Katrianne Lehtipalo,Katrianne Lehtipalo,Markus Leiminger,Markus Leiminger,Roy L. Mauldin,Roy L. Mauldin,Ugo Molteni,Leonid Nichman,Tuukka Petäjä,Nina Sarnela,Siegfried Schobesberger,Siegfried Schobesberger,Mario Simon,Mikko Sipilä,Dominik Stolzenburg,António Tomé,Alexander L. Vogel,Alexander L. Vogel,Andrea Christine Wagner,Robert Wagner,Mao Xiao,Chao Yan,Penglin Ye,Joachim Curtius,Neil M. Donahue,Richard C. Flagan,Markku Kulmala,Douglas R. Worsnop,Douglas R. Worsnop,Paul M. Winkler,Josef Dommen,Urs Baltensperger +68 more
TL;DR: In this article, the authors compared the molecular composition of positive and negative HOM clusters measured with atmospheric pressure interface time-of-flight mass spectrometers at three different temperatures (25, 5, and − 25) ∘ C).
Journal ArticleDOI
Formation and growth of sub-3-nm aerosol particles in experimental chambers
Lubna Dada,Katrianne Lehtipalo,Katrianne Lehtipalo,Jenni Kontkanen,Tuomo Nieminen,Rima Baalbaki,Lauri Ahonen,Jonathan Duplissy,Jonathan Duplissy,Chao Yan,Chao Yan,Biwu Chu,Tuukka Petäjä,Tuukka Petäjä,Kari E. J. Lehtinen,Kari E. J. Lehtinen,Veli-Matti Kerminen,Markku Kulmala,Markku Kulmala,Juha Kangasluoma,Juha Kangasluoma +20 more
TL;DR: This protocol describes the instrumentation and analysis methods needed to quantify particles dynamics during new particle formation of sub-3-nm aerosol particles in chamber experiments and outlines methods to directly quantify particle dynamics for cluster sizes.
Journal ArticleDOI
Secondary organic aerosol formed by condensing anthropogenic vapours over China’s megacities
Wei Ni,Chao Yan,Dandan Huang,Zhe Wang,Yuliang Liu,Xiaohui Qiao,Yishuo Guo,Linhui Tian,Penggang Zheng,Yuanyuan Li,Zheng Xu,Ximeng Qi,Peng Sun,Jiaping Wang,Feixue Zheng,Xiaoxiao Li,Rujing Yin,Kaspar R. Dallenbach,Tuukka Petäjä,Yanjun Zhang,Mingyi Wang,Meredith Schervish,Sainan Wang,Liping Qiao,Qian Wang,Min Zhou,Hong Wang,Chuan Yu,Dawen Yao,Hai Guo,Penglin Ye,Shuncheng Lee,Yong Jie Li,Yongchun Liu,Xuguang Chi,Veli-Matti Kerminen,Mikael Ehn,Neil M. Donahue,Tao Wang,Cheng Huang,Markku Kulmala,Douglas R. Worsnop,Jingkun Jiang,Aijun Ding +43 more
TL;DR: In this paper , the authors present coordinated measurements of oxygenated organic molecules in the three most urbanized regions of China and determine their likely precursors, enabling them to connect secondary organic aerosol formation to various volatile organic compounds.
Journal ArticleDOI
Formation of Highly Oxygenated Organic Molecules from α-Pinene Ozonolysis: Chemical Characteristics, Mechanism, and Kinetic Model Development
Ugo Molteni,Mario Simon,Martin Heinritzi,Christopher R. Hoyle,Anne-Kathrin Bernhammer,F. Bianchi,Martin Breitenlechner,Sophia Brilke,A.A. Dias,Jonathan Duplissy,Jonathan Duplissy,Carla Frege,Hamish Gordon,Claudia Heyn,Tuija Jokinen,Andreas Kürten,Katrianne Lehtipalo,Katrianne Lehtipalo,Vladimir Makhmutov,Tuukka Petäjä,Simone M. Pieber,Arnaud P. Praplan,Siegfried Schobesberger,Siegfried Schobesberger,Gerhard Steiner,Yuri Stozhkov,António Tomé,Jasmin Tröstl,Andrea Christine Wagner,Robert Wagner,Christina Williamson,Chao Yan,Urs Baltensperger,Joachim Curtius,Neil M. Donahue,Armin Hansel,Jasper Kirkby,Jasper Kirkby,Markku Kulmala,Markku Kulmala,Markku Kulmala,Douglas R. Worsnop,Josef Dommen +42 more
TL;DR: In this paper, a part of this oxidation can proceed through an autoxidation process, which is an important source of secondary organic aerosol (SOA) in the atmosphere.
Journal ArticleDOI
Aqueous phase oxidation of sulphur dioxide by ozone in cloud droplets
Christopher R. Hoyle,Claudia Fuchs,Emma Järvinen,Harald Saathoff,Antonio Dias,I. El Haddad,Martin Gysel,Sean Coburn,Jasmin Tröstl,Anne-Kathrin Bernhammer,F. Bianchi,Martin Breitenlechner,Joel C. Corbin,J. Craven,J. Craven,Neil M. Donahue,Jonathan Duplissy,Sebastian Ehrhart,Carla Frege,Hamish Gordon,Niko Florian Höppel,Martin Heinritzi,Thomas Bjerring Kristensen,Ugo Molteni,Leonid Nichman,Tamara Pinterich,André S. H. Prévôt,Mario Simon,Jay G. Slowik,Gerhard Steiner,Gerhard Steiner,Gerhard Steiner,António Tomé,Alexander L. Vogel,Rainer Volkamer,Andrea Christine Wagner,Robert Wagner,Anthony S. Wexler,Christina Williamson,Christina Williamson,Christina Williamson,Paul M. Winkler,Chao Yan,António Amorim,Josef Dommen,Joachim Curtius,Martin Gallagher,Richard C. Flagan,Armin Hansel,Jasper Kirkby,Jasper Kirkby,Markku Kulmala,Ottmar Möhler,F. Stratmann,Douglas R. Worsnop,Urs Baltensperger +55 more
TL;DR: In this paper, the growth of aerosol due to the aqueous phase oxidation of sulfur dioxide by ozone was measured in laboratory-generated clouds created in the Cosmics Leaving OUtdoor Droplets (CLOUD) chamber at the European Organization for Nuclear Research (CERN).