G. A. Martínez–Castañón¹*, J. P. Loyola–Rodríguez¹, J. F. Reyes–Macías¹, N. Niño–Martínez² and Facundo Ruiz²

¹ Maestría en Ciencias Odontológicas, Facultad de Estomatología, UASLP Av. Manuel Nava # 2, Zona Universitaria, San Luis Potosí, S. L. P., México. Corresponding author: mtzcastanon@fciencias.uaslp.mx

² Facultad de Ciencias, UASLP Álvaro Obregón 64, C. P. 78000, San Luis Potosí, S. L. P., México.

Recibido: 20 de agosto de 2010.
Aceptado: 21 de octubre de 2010.

Water soluble CdS nanoparticles were synthesized using a simple aqueous method that enables us to obtain functionalized nanoparticles with different sizes, optical absorption and emission features. These differences were reached using several Cd²+ to S^2– molar ratios and various capping agents. The size of the nanoparticles ranges were from 2.6 to 3.88 nm depending on the synthesis conditions. CdS nanoparticles prepared could be used as biolabels because their nanometric dimensions, luminescence signal and most important to their functionalization with organic molecules, which have functional groups that can attach them to biomolecules or cells.

Keywords: Luminescence; Nanomaterials; Semiconductors; Optical materials and properties.

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