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Journal of Nanomaterials
Volume 2012 (2012), Article ID 279810, 11 pages
http://dx.doi.org/10.1155/2012/279810
Research Article

Patterning Luminescent Nanocrystalline L a P O 4  : Eu and C e P O 4  : Tb Particles Embedded in Hybrid Organosilica with Soft-Lithographic Techniques

1Faculty of Materials Science and Engineering, Institute of Space Technology, P.O. Box 2750, Islamabad 44000, Pakistan
2MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands

Received 29 September 2011; Revised 3 November 2011; Accepted 3 November 2011

Academic Editor: Shanfeng Wang

Copyright © 2012 Sajid U. Khan and Johan E. ten Elshof. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Eu3+-doped LaPO4 and Tb3+-doped CePO4 luminescent nanoparticles embedded in hybrid organosilica were patterned by two soft lithographic techniques. The role of various parameters such as solution chemistry, thermal protocols, and modification of the mold-substrate surface energies related to pattern shape formation and adhesion to the substrates have been studied. The shrinkage of the oxide patterns and shape evolution during the process was also examined. The patterns were characterized with optical and photoluminescence (PL) microscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Compositional analyses were carried out with X-ray photoelectron spectroscopy (XPS), low-energy ion scattering (LEIS), and secondary ion mass spectroscopy (SIMS). The results indicated that the final patterns obtained with these two techniques for the same material have different shapes and adherence to the substrates.