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Showing 1 to 12 of 23 entries
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The formation of highly oxidized multifunctional products in the ozonolysis of cyclohexene.

Journal of the American Chemical Society

Rissanen MP, Kurtén T, Sipilä M, Thornton JA, Kangasluoma J, Sarnela N, Junninen H, Jørgensen S, Schallhart S, Kajos MK, Taipale R, Springer M, Mentel TF, Ruuskanen T, Petäjä T, Worsnop DR, Kjaergaard HG, Ehn M.
PMID: 25283472
J Am Chem Soc. 2014 Nov 05;136(44):15596-606. doi: 10.1021/ja507146s. Epub 2014 Oct 21.

The prompt formation of highly oxidized organic compounds in the ozonolysis of cyclohexene (C6H10) was investigated by means of laboratory experiments together with quantum chemical calculations. The experiments were performed in borosilicate glass flow tube reactors coupled to a...

Solar eclipse demonstrating the importance of photochemistry in new particle formation.

Scientific reports

Jokinen T, Kontkanen J, Lehtipalo K, Manninen HE, Aalto J, Porcar-Castell A, Garmash O, Nieminen T, Ehn M, Kangasluoma J, Junninen H, Levula J, Duplissy J, Ahonen LR, Rantala P, Heikkinen L, Yan C, Sipilä M, Worsnop DR, Bäck J, Petäjä T, Kerminen VM, Kulmala M.
PMID: 28374761
Sci Rep. 2017 Apr 04;7:45707. doi: 10.1038/srep45707.

Solar eclipses provide unique possibilities to investigate atmospheric processes, such as new particle formation (NPF), important to the global aerosol load and radiative balance. The temporary absence of solar radiation gives particular insight into different oxidation and clustering processes...

Multicomponent new particle formation from sulfuric acid, ammonia, and biogenic vapors.

Science advances

Lehtipalo K, Yan C, Dada L, Bianchi F, Xiao M, Wagner R, Stolzenburg D, Ahonen LR, Amorim A, Baccarini A, Bauer PS, Baumgartner B, Bergen A, Bernhammer AK, Breitenlechner M, Brilke S, Buchholz A, Mazon SB, Chen D, Chen X, Dias A, Dommen J, Draper DC, Duplissy J, Ehn M, Finkenzeller H, Fischer L, Frege C, Fuchs C, Garmash O, Gordon H, Hakala J, He X, Heikkinen L, Heinritzi M, Helm JC, Hofbauer V, Hoyle CR, Jokinen T, Kangasluoma J, Kerminen VM, Kim C, Kirkby J, Kontkanen J, Kürten A, Lawler MJ, Mai H, Mathot S, Mauldin RL, Molteni U, Nichman L, Nie W, Nieminen T, Ojdanic A, Onnela A, Passananti M, Petäjä T, Piel F, Pospisilova V, Quéléver LLJ, Rissanen MP, Rose C, Sarnela N, Schallhart S, Schuchmann S, Sengupta K, Simon M, Sipilä M, Tauber C, Tomé A, Tröstl J, Väisänen O, Vogel AL, Volkamer R, Wagner AC, Wang M, Weitz L, Wimmer D, Ye P, Ylisirniö A, Zha Q, Carslaw KS, Curtius J, Donahue NM, Flagan RC, Hansel A, Riipinen I, Virtanen A, Winkler PM, Baltensperger U, Kulmala M, Worsnop DR.
PMID: 30547087
Sci Adv. 2018 Dec 12;4(12):eaau5363. doi: 10.1126/sciadv.aau5363. eCollection 2018 Dec.

A major fraction of atmospheric aerosol particles, which affect both air quality and climate, form from gaseous precursors in the atmosphere. Highly oxygenated organic molecules (HOMs), formed by oxidation of biogenic volatile organic compounds, are known to participate in...

Seed-Adsorbate Interactions as the Key of Heterogeneous Butanol and Diethylene Glycol Nucleation on Ammonium Bisulfate and Tetramethylammonium Bromide.

The journal of physical chemistry. A

Keshavarz F, Kurtén T, Vehkamäki H, Kangasluoma J.
PMID: 33267578
J Phys Chem A. 2020 Dec 17;124(50):10527-10539. doi: 10.1021/acs.jpca.0c08373. Epub 2020 Dec 02.

Condensation particle counter (CPC) instruments are commonly used to detect atmospheric nanoparticles. They operate on the basis of condensing an organic working fluid on the nanoparticle seeds to grow the particles to a detectable size, and at the size...

Global atmospheric particle formation from CERN CLOUD measurements.

Science (New York, N.Y.)

Dunne EM, Gordon H, Kürten A, Almeida J, Duplissy J, Williamson C, Ortega IK, Pringle KJ, Adamov A, Baltensperger U, Barmet P, Benduhn F, Bianchi F, Breitenlechner M, Clarke A, Curtius J, Dommen J, Donahue NM, Ehrhart S, Flagan RC, Franchin A, Guida R, Hakala J, Hansel A, Heinritzi M, Jokinen T, Kangasluoma J, Kirkby J, Kulmala M, Kupc A, Lawler MJ, Lehtipalo K, Makhmutov V, Mann G, Mathot S, Merikanto J, Miettinen P, Nenes A, Onnela A, Rap A, Reddington CL, Riccobono F, Richards NA, Rissanen MP, Rondo L, Sarnela N, Schobesberger S, Sengupta K, Simon M, Sipilä M, Smith JN, Stozkhov Y, Tomé A, Tröstl J, Wagner PE, Wimmer D, Winkler PM, Worsnop DR, Carslaw KS.
PMID: 27789796
Science. 2016 Dec 02;354(6316):1119-1124. doi: 10.1126/science.aaf2649. Epub 2016 Oct 27.

Fundamental questions remain about the origin of newly formed atmospheric aerosol particles because data from laboratory measurements have been insufficient to build global models. In contrast, gas-phase chemistry models have been based on laboratory kinetics measurements for decades. We...

Molecular-scale evidence of aerosol particle formation via sequential addition of HIO.

Nature

Sipilä M, Sarnela N, Jokinen T, Henschel H, Junninen H, Kontkanen J, Richters S, Kangasluoma J, Franchin A, Peräkylä O, Rissanen MP, Ehn M, Vehkamäki H, Kurten T, Berndt T, Petäjä T, Worsnop D, Ceburnis D, Kerminen VM, Kulmala M, O'Dowd C.
PMID: 27580030
Nature. 2016 Sep 22;537(7621):532-534. doi: 10.1038/nature19314. Epub 2016 Aug 31.

Homogeneous nucleation and subsequent cluster growth leads to the formation of new aerosol particles in the atmosphere. The nucleation of sulfuric acid and organic vapours is thought to be responsible for the formation of new particles over continents, whereas...

Direct observations of atmospheric aerosol nucleation.

Science (New York, N.Y.)

Kulmala M, Kontkanen J, Junninen H, Lehtipalo K, Manninen HE, Nieminen T, Petäjä T, Sipilä M, Schobesberger S, Rantala P, Franchin A, Jokinen T, Järvinen E, Äijälä M, Kangasluoma J, Hakala J, Aalto PP, Paasonen P, Mikkilä J, Vanhanen J, Aalto J, Hakola H, Makkonen U, Ruuskanen T, Mauldin RL, Duplissy J, Vehkamäki H, Bäck J, Kortelainen A, Riipinen I, Kurtén T, Johnston MV, Smith JN, Ehn M, Mentel TF, Lehtinen KE, Laaksonen A, Kerminen VM, Worsnop DR.
PMID: 23430652
Science. 2013 Feb 22;339(6122):943-6. doi: 10.1126/science.1227385.

Atmospheric nucleation is the dominant source of aerosol particles in the global atmosphere and an important player in aerosol climatic effects. The key steps of this process occur in the sub-2-nanometer (nm) size range, in which direct size-segregated observations...

Particle growth with photochemical age from new particle formation to haze in the winter of Beijing, China.

The Science of the total environment

Chu B, Dada L, Liu Y, Yao L, Wang Y, Du W, Cai J, Dällenbach KR, Chen X, Simonen P, Zhou Y, Deng C, Fu Y, Yin R, Li H, He XC, Feng Z, Yan C, Kangasluoma J, Bianchi F, Jiang J, Kujansuu J, Kerminen VM, Petäjä T, He H, Kulmala M.
PMID: 33207435
Sci Total Environ. 2021 Jan 20;753:142207. doi: 10.1016/j.scitotenv.2020.142207. Epub 2020 Sep 14.

Secondary aerosol formation in the aging process of primary emission is the main reason for haze pollution in eastern China. Pollution evolution with photochemical age was studied for the first time at a comprehensive field observation station during winter...

Is reducing new particle formation a plausible solution to mitigate particulate air pollution in Beijing and other Chinese megacities?.

Faraday discussions

Kulmala M, Dada L, Daellenbach KR, Yan C, Stolzenburg D, Kontkanen J, Ezhova E, Hakala S, Tuovinen S, Kokkonen TV, Kurppa M, Cai R, Zhou Y, Yin R, Baalbaki R, Chan T, Chu B, Deng C, Fu Y, Ge M, He H, Heikkinen L, Junninen H, Liu Y, Lu Y, Nie W, Rusanen A, Vakkari V, Wang Y, Yang G, Yao L, Zheng J, Kujansuu J, Kangasluoma J, Petäjä T, Paasonen P, Järvi L, Worsnop D, Ding A, Liu Y, Wang L, Jiang J, Bianchi F, Kerminen VM.
PMID: 33290451
Faraday Discuss. 2021 Mar 01;226:334-347. doi: 10.1039/d0fd00078g. Epub 2020 Dec 08.

Atmospheric gas-to-particle conversion is a crucial or even dominant contributor to haze formation in Chinese megacities in terms of aerosol number, surface area and mass. Based on our comprehensive observations in Beijing during 15 January 2018-31 March 2019, we...

Molecular Composition of Oxygenated Organic Molecules and Their Contributions to Organic Aerosol in Beijing.

Environmental science & technology

Wang Y, Clusius P, Yan C, Dällenbach K, Yin R, Wang M, He XC, Chu B, Lu Y, Dada L, Kangasluoma J, Rantala P, Deng C, Lin Z, Wang W, Yao L, Fan X, Du W, Cai J, Heikkinen L, Tham YJ, Zha Q, Ling Z, Junninen H, Petäjä T, Ge M, Wang Y, He H, Worsnop DR, Kerminen VM, Bianchi F, Wang L, Jiang J, Liu Y, Boy M, Ehn M, Donahue NM, Kulmala M.
PMID: 34806377
Environ Sci Technol. 2021 Nov 22; doi: 10.1021/acs.est.1c05191. Epub 2021 Nov 22.

The understanding at a molecular level of ambient secondary organic aerosol (SOA) formation is hampered by poorly constrained formation mechanisms and insufficient analytical methods. Especially in developing countries, SOA related haze is a great concern due to its significant...

Heterogeneous Nucleation of Butanol on NaCl: A Computational Study of Temperature, Humidity, Seed Charge, and Seed Size Effects.

The journal of physical chemistry. A

Toropainen A, Kangasluoma J, Kurtén T, Vehkamäki H, Keshavarz F, Kubečka J.
PMID: 33788572
J Phys Chem A. 2021 Apr 15;125(14):3025-3036. doi: 10.1021/acs.jpca.0c10972. Epub 2021 Mar 31.

Using a combination of quantum chemistry and cluster size distribution dynamics, we study the heterogeneous nucleation of

Comparison of the SAWNUC model with CLOUD measurements of sulphuric acid-water nucleation.

Journal of geophysical research. Atmospheres : JGR

Ehrhart S, Ickes L, Almeida J, Amorim A, Barmet P, Bianchi F, Dommen J, Dunne EM, Duplissy J, Franchin A, Kangasluoma J, Kirkby J, Kürten A, Kupc A, Lehtipalo K, Nieminen T, Riccobono F, Rondo L, Schobesberger S, Steiner G, Tomé A, Wimmer D, Baltensperger U, Wagner PE, Curtius J.
PMID: 28239533
J Geophys Res Atmos. 2016 Oct 27;121(20):12401-12414. doi: 10.1002/2015JD023723.

Binary nucleation of sulphuric acid-water particles is expected to be an important process in the free troposphere at low temperatures. SAWNUC (Sulphuric Acid Water Nucleation) is a model of binary nucleation that is based on laboratory measurements of the...

Showing 1 to 12 of 23 entries