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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4231

Title: Femtosecond laser control of chemical reactions
Authors: Du Plessis, A
Strydom, CA
Uys, H
Botha, L
Roberts, T
Dlamini, TH
Keywords: Femtosecond laser control
Chemical reactions
Pulse-shaping techniques
Algorithm feedback loop
Low-pressure gas-phase laser
Induced chemical reactions
Hydrocarbon products
CSIR Conference 2010
Issue Date: 31-Aug-2010
Publisher: CSIR
Citation: Du Plessis, A. 2010. Femtosecond laser control of chemical reactions. CSIR 3rd biennial conference: 2010 science real and, relevant, CSIR International Convention Center, Pretoria, South Africa, 30 August-1 September 2010, pp 11
Abstract: Femtosecond laser control of chemical reactions is made possible through the use of pulse-shaping techniques coupled to a learning algorithm feedback loop – teaching the laser pulse to control the chemical reaction. This can result in controllable relative fragmentation ratios for unimolecular dissociation reactions – therefore selectively breaking bonds in a molecule. More interestingly, the same techniques can be used to provide control over chemical reactions involving two or more reactant molecules, where these come together, react and produce new reaction products. The reaction product ratios can be controlled in this way, providing a new form of selectivity in addition to the usual variation of temperature, pressure and catalysts in chemical reactions. In this work, low-pressure gas-phase laser-induced chemical reactions were studied, with the aim of controlling the reaction between CO and H2 to produce hydrocarbon products of interest to the petrochemicals industry. Preliminary experimental results are presented.
Description: CSIR 3rd biennial conference: 2010 science real and, relevant, CSIR International Convention Center, Pretoria, South Africa, 30 August-1 September 2010.
URI: http://hdl.handle.net/10204/4231
Appears in Collections:CSIR Conference 2010
General science, engineering & technology

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