Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

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

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

Discoveries

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Nuclear pores captured on film: Using an ultra fast-scanning atomic force microscope, researchers from the University of Basel have filmed 'living' nuclear pore complexes at work for the first time May 3rd, 2016

Announcements

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

Tools

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

Environment

Team builds first quantum cascade laser on silicon: Eliminates the need for an external light source for mid-infrared silicon photonic devices or photonic circuits April 21st, 2016

Atomically thin sensor detects harmful air pollution in the home April 18th, 2016

Catalyst could make production of key chemical more eco-friendly April 10th, 2016

Nanoporous material's strange "breathing" behavior April 7th, 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