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




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Journal of NanomaterialsVolume 2012 2012, Article ID 279810, 11 pages

Research Article

Faculty of Materials Science and Engineering, Institute of Space Technology, P.O. Box 2750, Islamabad 44000, Pakistan

MESA+ 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

Eu

-doped LaPO4 and Tb

-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.





Autor: Sajid U. Khan and Johan E. ten Elshof

Fuente: https://www.hindawi.com/



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