Synthesis and characterization of erbium doped silica nanoparticles by sol-gel

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Synthesis and characterization of erbium doped silica
nanoparticles by sol-gel
1

I. S. Polido¹ , , S. N. M. Mestanza1*, A. O. Ribeiro1
Federal University of ABC (UFABC), Santo André,SP, Brazil

Today the production of light emitting devices based on silicon, due to their potential
technological applications have been studied, as well as its processing, which is beingimproved so as to make it simpler. [1]
In this work is reported the study about the synthesis of erbium doped silica nanoparticles
(NPs), and the analyzes of the interference of some processvariables, like annealing time and
temperature and erbium concentration, in order to make them more efficient, with the
emission centered around 1.55mm, and with the smallest width at halfheight possible.
The NPs are synthesized in acidic media, through the sol -gel method at room temperature,
requiring only a high temperature for annealing
Characterizations such as FTIRspectroscopy, zeta pote ntial and X-ray diffraction (XRD) of
samples produced with varying synthesis will be presented, as well as its relevance and
interference in NPs formed.
Figure 1 showsthe sol-gel synthesis process and in Figure 2 can be observed the Raman
spectroscopy characterizations, (characteristics: maximum exposed time: 20 minutes,
excitation line: 488nm - argonlaser), where the peak located at 559.29cm -1, characteristic of
rare earth, like erbium, just appears when the sample were exposed longer, and in the curves
(b) and (c), samples who were exposedfaster, the peaks are just the characteristics from the
crystalline silica matrix.[2]

Keywords: Erbium, doped, nano particles, sol-gel.
Work supported by UFABC
[1] Enrichi, F. Annals ofthe New York Academy of Sciences, 1130, 262 (2008)
[2] Frank L. Galeener. Journal of Non-Cristalline Solids 71, 373 (1985)
*Corresponding author, electronic mail: nilo@ufabc.edu.br

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