Premium
Synthesis and characterization of CdSe/ZnS core‐shell quantum dots immobilized on solid substrates through laser irradiation
Author(s) -
György E.,
del Pino A. Pérez,
Roqueta J.,
Ballesteros B.,
Miguel A. S.,
Maycock C.,
Oliva A. G.
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127749
Subject(s) - materials science , quantum dot , laser , fluence , irradiation , excimer laser , absorption (acoustics) , optoelectronics , evaporation , full width at half maximum , analytical chemistry (journal) , optics , chemistry , composite material , physics , chromatography , nuclear physics , thermodynamics
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, τ FWHM ≅ 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.