Nano Archive

Nanoparticle formation from supersaturated carbon vapour generated by laser photolysis of carbon suboxide

Eremin, A and Gurentsov, E and Hofmann, M and Kock, B and Schulz, C (2006) Nanoparticle formation from supersaturated carbon vapour generated by laser photolysis of carbon suboxide. Journal of Physics D: Applied Physics, 39 (20). pp. 4359-4365.

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL: http://stacks.iop.org/0022-3727/39/4359

Abstract

In this work particle formation and growth from condensation of supersaturated carbon vapour was investigated. Atomic carbon vapour was generated under well-controlled conditions from UV-laser pulse photolysis of C3O2 at 193 nm. Particle formation and growth were studied in a wide range of conditions with varying carbon vapour concentration, bath gas composition and pressure. The formation of particulate matter was observed as a function of time by laser light extinction. Particle sizes were determined in situ by time-resolved laser-induced incandescence and ex situ by transmission electronic microscopy. The characteristic time of particle growth was 20-1000 us. The final particle size was 5-12 nm, increased with pressure, and depends on bath gas composition. We propose a simple model for the description of carbon vapour condensation that assumes condensation of individual atoms on the cluster surface as the main growth mechanism. The comparison of experiments and simulations provides information about the initial concentration of carbon clusters for the different mixture conditions.

Item Type:Article
ID Code:5374
Deposited By:Prof. Alexey Ivanov
Deposited On:06 Feb 2010 11:10
Last Modified:06 Feb 2010 11:53

Repository Staff Only: item control page