Featured Research

from universities, journals, and other organizations

Formation of nanoparticles can now be studied molecule-by-molecule

Date:
February 22, 2013
Source:
Helsingin yliopisto (University of Helsinki)
Summary:
Atmospheric aerosol particles affect our climate by slowing down the global warming, research suggests. Scientists have succeeded in developing measurement techniques that allow detection of aerosol nucleation starting from the formation of clusters from vapor molecules, and the growth of these clusters into aerosol particles.

Atmospheric aerosol particles affect our climate by slowing down the global warming. After years of studying the international research group led by Academy Professor Markku Kulmala from the University of Helsinki, Department of Physics, Finland has succeeded in developing measurement techniques that allow detection of aerosol nucleation starting from the formation of clusters from vapor molecules, and the growth of these clusters into aerosol particles.

The results are published in the journal Science on the 22th of February 2013.

The study combines the cycles of sulphur, nitrogen and carbon in the ecosystem, as it shows that the molecular clusters need sulphuric acid, amines and oxygenated organics for growth. When the clusters reach a size of 1.5-2 nm, their growth increases considerably. The measurements were conducted at the University of Helsinki SMEAR II (Station for Measuring Forest Ecosystem-Atmosphere Relations) measurement station in Hyytiδlδ, southern Finland, which is among the most comprehensive stations in the world for atmosphere and biosphere research.

During the last five years, the researchers at the University of Helsinki Physics Department have developed a Particle Size Magnifier (PSM), which is the first particle counter able to detect clusters and particles as small as 1 nm in diameter. The instrument is commercially available through the spin-off company Airmodus. The scientists have also put effort into developing mass spectrometric methods for measuring the composition of the recently born clusters. The results in this study would not have been achieved without this technical development.

Professor Kulmala predicted the existence of neutral molecular clusters already in the year 2000 and their growth mechanisms in 2004.

He says:-Years of systematical research are now bearing fruit. My theoretical predictions have been proven to reflect the reality.

He stresses that knowledge of the formation and growth mechanisms of nanoparticles is needed for understanding the interactions within the climate system. Assessing the global impact requires an extensive data bank and a world-wide observation network.


Story Source:

The above story is based on materials provided by Helsingin yliopisto (University of Helsinki). Note: Materials may be edited for content and length.


Journal Reference:

  1. M. Kulmala, J. Kontkanen, H. Junninen, K. Lehtipalo, H. E. Manninen, T. Nieminen, T. Petaja, M. Sipila, S. Schobesberger, P. Rantala, A. Franchin, T. Jokinen, E. Jarvinen, M. Aijala, J. Kangasluoma, J. Hakala, P. P. Aalto, P. Paasonen, J. Mikkila, J. Vanhanen, J. Aalto, H. Hakola, U. Makkonen, T. Ruuskanen, R. L. Mauldin, J. Duplissy, H. Vehkamaki, J. Back, A. Kortelainen, I. Riipinen, T. Kurten, M. V. Johnston, J. N. Smith, M. Ehn, T. F. Mentel, K. E. J. Lehtinen, A. Laaksonen, V.-M. Kerminen, D. R. Worsnop. Direct Observations of Atmospheric Aerosol Nucleation. Science, 2013; 339 (6122): 943 DOI: 10.1126/science.1227385

Cite This Page:

Helsingin yliopisto (University of Helsinki). "Formation of nanoparticles can now be studied molecule-by-molecule." ScienceDaily. ScienceDaily, 22 February 2013. <www.sciencedaily.com/releases/2013/02/130222075732.htm>.
Helsingin yliopisto (University of Helsinki). (2013, February 22). Formation of nanoparticles can now be studied molecule-by-molecule. ScienceDaily. Retrieved September 30, 2014 from www.sciencedaily.com/releases/2013/02/130222075732.htm
Helsingin yliopisto (University of Helsinki). "Formation of nanoparticles can now be studied molecule-by-molecule." ScienceDaily. www.sciencedaily.com/releases/2013/02/130222075732.htm (accessed September 30, 2014).

Share This



More Earth & Climate News

Tuesday, September 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Balloon Descends to Bottom of Croatian Cave

Raw: Balloon Descends to Bottom of Croatian Cave

AP (Sep. 29, 2014) — An Austrian balloon pilot has succeeded in taking a balloon deep underground, a feat which he believes is a world first. (Sept. 29) Video provided by AP
Powered by NewsLook.com
Bodies Recovered from Japan Volcano Eruption

Bodies Recovered from Japan Volcano Eruption

AP (Sep. 29, 2014) — Rescue crews finished recovering the remaining 27 bodies from atop Japan's Mount Ontake Monday. At least 31 people were killed Saturday in the mountain's first fatal volcanic event in modern history. (Sept. 29) Video provided by AP
Powered by NewsLook.com
Raw: Japan's Mount Ontake Erupts

Raw: Japan's Mount Ontake Erupts

AP (Sep. 27, 2014) — A volcano erupted in central Japan on Saturday, sending a large plume of ash high into the sky and prompting a warning to climbers and others to avoid the area. (Sept. 27) Video provided by AP
Powered by NewsLook.com
California University Designs Sustainable Winery

California University Designs Sustainable Winery

Reuters - US Online Video (Sep. 27, 2014) — Amid California's worst drought in decades, scientists at UC Davis design a sustainable winery that includes a water recycling system. Vanessa Johnston reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins