Synthesis and characterization of CdSe/ZnS core-shell quantum dots immobilized on solid substrates through laser irradiation

Authors

  • E. György,

    Corresponding author
    1. Centre d'Investigacions en Nanociència i Nanotecnologia, Institut Català de Nanotecnologia, Consejo Superior de Investigaciones Cientificas (CIN2, ICN-CSIC), Campus UAB, 08193 Bellaterra, Spain
    2. National Institute for Lasers, Plasma and Radiation Physics, P. O. Box MG 36, 76900 Bucharest V, Romania
    • Phone: +34-93-581-37-25, Fax: +34-93-581-37-17, Web: www.cin2.es
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  • A. Pérez del Pino,

    1. Instituto de Ciencia de Materiales de Barcelona, Consejo Superior de Investigaciones Cientificas (ICMAB, CSIC), Campus UAB, 08193 Bellaterra, Spain
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  • J. Roqueta,

    1. Centre d'Investigacions en Nanociència i Nanotecnologia, Institut Català de Nanotecnologia, Consejo Superior de Investigaciones Cientificas (CIN2, ICN-CSIC), Campus UAB, 08193 Bellaterra, Spain
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  • B. Ballesteros,

    1. Centre d'Investigacions en Nanociència i Nanotecnologia, Institut Català de Nanotecnologia, Consejo Superior de Investigaciones Cientificas (CIN2, ICN-CSIC), Campus UAB, 08193 Bellaterra, Spain
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  • A. S. Miguel,

    1. Instituto de Tecnologia Quimica e Biológica, Universidade Nova de Lisboa (ITQB-UNL), 2781-901 Oeiras, Portugal
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  • C. Maycock,

    1. Instituto de Tecnologia Quimica e Biológica, Universidade Nova de Lisboa (ITQB-UNL), 2781-901 Oeiras, Portugal
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  • A. G. Oliva

    1. Instituto de Tecnologia Quimica e Biológica, Universidade Nova de Lisboa (ITQB-UNL), 2781-901 Oeiras, Portugal
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Abstract

CdSe/ZnS core-shell quantum dots (QDs) have been immobilized onto solid substrates by matrix assisted pulsed laser evaporation (MAPLE). An UV KrF* (λ = 248 nm, τFWHM ≅ 25 ns) excimer laser source was used for irradiations of the composite MAPLE targets. The targets were prepared by the dispersion of the CdSe/ZnS QDs in a solvent with high absorption at the incident laser radiation. The dependence of the surface morphology, crystalline structure, chemical composition, and functional properties of the laser transferred CdSe/ZnS QDs on the processing conditions as incident laser fluence value and ambient atmosphere inside the irradiation chamber was investigated. The possible physical mechanisms implied in the laser ablation process were identified.

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