Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Formation of nanoparticles can now be studied molecule-by-molecule

Abstract:
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 prestigious Science magazine on 22th of February 2013.

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

Helsinki, Finland | Posted on February 23rd, 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 Hyytiälä, 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.

####

About University of Helsinki
Founded in Turku in 1640, the University moved to Helsinki in 1828. The University of Helsinki has nine faculties: Theology, Law, Medicine, Arts, Science, Education, Social Sciences, Agriculture and Forestry, Veterinary Medicine.

For more information, please click here

Contacts:
Markku Kulmala
University of Helsinki
tel. +358 40 596 2311

Minna Meriläinen
+358 9 191 51042

Copyright © University of Helsinki

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

A nanoscale wireless communication system via plasmonic antennas: Greater control affords 'in-plane' transmission of waves at or near visible light August 27th, 2016

Forces of nature: Interview with microscopy innovators Gerd Binnig and Christoph Gerber August 26th, 2016

A promising route to the scalable production of highly crystalline graphene films August 26th, 2016

Graphene under pressure August 26th, 2016

Discoveries

A promising route to the scalable production of highly crystalline graphene films August 26th, 2016

Graphene under pressure August 26th, 2016

Nanofur for oil spill cleanup: Materials researchers learn from aquatic ferns: Hairy plant leaves are highly oil-absorbing / publication in bioinspiration & biomimetics / video on absorption capacity August 25th, 2016

Unraveling the crystal structure of a -70° Celsius superconductor, a world first: Significant advancement in the realization of room-temperature superconductors August 25th, 2016

Announcements

A nanoscale wireless communication system via plasmonic antennas: Greater control affords 'in-plane' transmission of waves at or near visible light August 27th, 2016

Forces of nature: Interview with microscopy innovators Gerd Binnig and Christoph Gerber August 26th, 2016

A promising route to the scalable production of highly crystalline graphene films August 26th, 2016

Graphene under pressure August 26th, 2016

Tools

Nanofiber scaffolds demonstrate new features in the behavior of stem and cancer cells August 25th, 2016

50 years after the release of the film 'Fantastic Voyage,' science upstages fiction: Science upstages fiction with nanorobotic agents designed to travel in the human body to treat cancer August 25th, 2016

University of Puerto Rico and NASA back in the news – XEI reports August 23rd, 2016

Spider silk: Mother Nature's bio-superlens August 22nd, 2016

Environment

Nanofur for oil spill cleanup: Materials researchers learn from aquatic ferns: Hairy plant leaves are highly oil-absorbing / publication in bioinspiration & biomimetics / video on absorption capacity August 25th, 2016

Researchers watch catalysts at work August 19th, 2016

Down to the wire: ONR researchers and new bacteria August 18th, 2016

SLAC, Stanford gadget grabs more solar energy to disinfect water faster: Plopped into water, a tiny device triggers the formation of chemicals that kill microbes in minutes August 15th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic