Homogeneous precipitation of doped zinc sulfide nanocrystals for photonic applications View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1995-04

AUTHORS

D. Gallagher, W.E. Héady, J.M. Racz, R.N. Bhargava

ABSTRACT

A process was developed to prepare nanocrystalline and quantum-confined particles of manganese-doped zinc sulfide. By the reaction of diethylzinc with solubilized hydrogen sulfide, particle sizes of 30–36 Å were achieved by control of reactant concentration, and size appeared to vary with the thermodynamic considerations indicative of homogeneous precipitation. Managanese doping required the development of an in situ chemical reaction compatible with the homogeneous precipitation reaction. To that end, ethylmagnesium chloride was reacted with manganese chloride to form the metastable diethylmanganese which acted as the dopant source. Quantum confinement of the particles was accomplished by using methacrylic acid and poly(methyl methacrylate) polymer of low molecular weights. These surfactants were transparent to the ultraviolet wavclcngths of light which allowed luminescent excitation of the material and provided surface passivation which enhanced phosphor brightness. The surfactant adsorption and effect of ultraviolet curing of the surfactant on the luminescent efficiency of the doped nanocrystals was investigated by infrared spectroscopy. These results indicate that the chemisorption of the surfactants to the nanoparticle surface and oxidation followed by crosslinking during curing are responsible for the improvement in luminescent efficiency. More... »

PAGES

870-876

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1557/jmr.1995.0870

DOI

http://dx.doi.org/10.1557/jmr.1995.0870

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021004049


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