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Proceedings Paper

Tuning the absorption and emission of CdSe and ZnS core-shell nanoparticles by laser radiation
Author(s): Ignacio F. Gallardo; Kay Hoffmann; John Keto
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Paper Abstract

CdSe and ZnS core-shell nanoparticles made by LAM (Laser Ablation of Microparticles) show photoluminesence (PL) peaks in a region of wavelengths around 400 nm. Control over the size and PL peak position is obtained by irradiating the nanoparticles multiple times. In LAM, micropaticle powder passes through an aerosol generator and then into a laser ablation glass cell, where a laser pulse (high energy excimer laser) ablates the microparticle aerosol. Nanoparticles are formed after condensation. At this stage the nanoparticles can be covered with a second material or irradiated multiple times to change their size. The size distribution of these particles is successfully investigated with TEM (Transmission Electron Microscopy). PL blue shifts are seen as the mean size decreases.

Paper Details

Date Published: 4 September 2008
PDF: 6 pages
Proc. SPIE 7030, Nanophotonic Materials V, 70300Z (4 September 2008); doi: 10.1117/12.795285
Show Author Affiliations
Ignacio F. Gallardo, The Univ. of Texas at Austin (United States)
Kay Hoffmann, The Univ. of Texas at Austin (United States)
John Keto, The Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 7030:
Nanophotonic Materials V
Zeno Gaburro; Stefano Cabrini; Dmitri Talapin, Editor(s)

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