Atmospheric aerosol particles have a significant effect on global climate, air quality, and consequently human health. Condensation of organic vapors is a key process in the growth of nanometer-sized particles to climate relevant sizes. This growth is very sensitive to the mass accommodation coefficient α, a quantity describing the vapor uptake ability of the particles, but knowledge on α of at...

A technique is described for specific, sensitive, quantitative, and rapid detection of biological targets by using superparamagnetic nanoparticles and a "microscope" based on a high-transition temperature dc superconducting quantum interference device (SQUID). In this technique, a mylar film to which the targets have been bound is placed on the microscope. The film, at room temperature and atmo...

The influence of emissions an active volcano on the composition nanoparticles and ultrafine road dust was identified in urban area Andes. Although many cities are close to volcanoes, few studies have evaluated their composition. Air quality areas is significantly affected by non-exhaust (e.g. dust, brake wear, tire wear), however, natural sources such as volcanoes also impact chemical particles...

Comparative study of measured and modelled number concentrations of 1 nanoparticles in an urban street canyon 2 Prashant Kumar , Andrew Garmory, Matthias Ketzel, Ruwim Berkowicz, and Rex Britter 3 Department of Engineering, University of Cambridge, CB2 1PZ Cambridge, United Kingdom 4 School of Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom 5 Department of Atmospheric Envir...

Coagulation of combustion generated nanoparticles and their measurement behind vehicle engines: can they play a role as atmospheric pollutants? H.-H. Grotheer, T. Gonzalez Baquet, M. Thierley, H. Pokorny, and M. Aigner DLR Institute of Combustion Technology, Pfaffenwaldring 38–40, 70569 Stuttgart, Germany Received: 25 February 2005 – Accepted: 31 March 2005 – Published: 10 June 2005 Corresponde...

The processes by which carbonaceous nanoparticles are produced from combustion of liquid and gaseous fuels are reviewed. The focus of the paper is on the formation and properties of nanoparticles in laboratory laminar, premixed and diffusion flames and on the most popular methods of sampling and detection of these particles. Particle chemical nature is analyzed from data obtained by several mea...