Document Detail

Stoichiometric investigations of laser-ablated brass plasma.
MedLine Citation:
PMID:  22410919     Owner:  NLM     Status:  In-Data-Review    
Laser-ablated brass plasma plumes expanding in various air pressures have been studied using optical emission spectroscopy and two-dimensional imaging. The velocity of the plume front calculated from the R-t plot decreases from 1.9×10<sup>4</sup>  m/s to ∼5.5×10<sup>3</sup>  m/s as the pressure increases from 0.01 to 10<sup>5</sup>  Pa. The estimated higher electron temperature for Cu I (510.5 nm) transition than for Zn I (481.1 nm) may be due to differences in the heat of vaporization and vaporization temperature of copper and zinc. The electron density estimated using the Stark-broadened transition 4pP<sub>3/2</sub>2→4s<sup>2</sup>D2<sub>5/2</sub> of Cu I (510.5 nm) is about 10 times higher than that for transition 4s5sS<sub>1</sub>3→4s4pP<sub>2</sub>3 of Zn I (481.1 nm). The appearance and enhancement of the Cu<sub>2</sub> (A-X) band at lower ambient pressure and formation of nanoparticle clusters have been extensively discussed. Stoichiometric and morphological study of the deposited nanoparticles on carbon tape at different ambient pressure reveals a different percentage composition of copper and of nanoparticles.
D N Patel; P K Pandey; R K Thareja
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  51     ISSN:  1539-4522     ISO Abbreviation:  Appl Opt     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-03-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  B192-200     Citation Subset:  IM    
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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