Abstracts Book - IMRC 2018

• SA6-P017
OPTICAL CHARACTERIZATION OF TITANIUM OXIDE
NANOCRYSTALS INSIDE A POROUS SILICON MATRIX OBTAINED
BY ELECTROLYSIS.
Fabiola Nieto 1 , Godofredo Garcia 2 , Tomás Díaz 2 , Enrique Rosendo 2 , Roman Romano Trujillo 2 ,
Crisoforo Morales Ruiz 2 , Antonio Coyopol Solis 2 , Minerva Sanchez Padilla 1 , Reina Galeazzi
Isasmendi 2
1 Benemerita Universidad Autonoma de Puebla, FCQ, Mexico. 2 Benemerita Universidad
Autonoma de Puebla, CIDS-ICUAP, Mexico.
Titanium oxide nanocrystals inside porous silicon, were obtained using the
technique of electrolysis on crystalline silicon substrates in this work. Two kinds
of process were used and compared, in one of them titanium oxide powder was
used as a precursor, in the other an organic compound was used in the
synthesis by sol-gel. The electrolyte was prepared with the titanium precursor
and a mixture of hydrofluoric acid-ethanol, a constant current of 40 mA was
applied in both cases. The effect of the process time and the thermal annealing
carried out on the samples, was studied using infrared spectroscopy (IR), UV-
Visible spectroscopy (UV-Vis) and X-ray diffraction (XRD). The results indicate
that nanometric particles with the anatase phase and good crystalline quality
can be obtained after the thermal annealing at 500 C in nitrogen atmosphere
inside the porous silicon structure. The optical response of the samples when
they are exposed to the radiation of an UV lamp is an orange
photoluminescence that is slightly attenuated as a function of the increment
time of the electrolytic process.
Keywords: TiO2, porous silicon, nanocrystal
Presenting authors email: ruscaballero@yahoo.com.mx