Effect Terthiophenes Units on the Microstructure and Birefringence of SiO2 Gels Prepared via Sol-Gels Processing
- Faculty of Science and Technology, University College of Science and Technology Malaysia, 21030, Kuala Terengganu, Terengganu (Malaysia)
Materials ceramics products based on SiO2 gels have been produced via sol-gels processing in present of 1% NH4F/H2O as catalyst. Alkoxysilane from tetraethoxysilane (TEOS) are chose as a matrices or template sources, than the product's of syntheses precursor: 2,5-bis(trimethoxysilyl)terthiophene (BTS3T) used as a motif organic compound: That product formed matrices as silicate backbone of terthiophene-briged silsesquioxane net-work; [O1.5Si-(C4H2S)n-SiO1.5]n. The structure silsesquioxane terthiophene-briged formed have layer distance of 4.6and 8.6 angstroms. So, that terthiophenes units in their structure give an effect on the characteristic pattern as an ordered micro lamellar structure. Electron microscopy analyses in matrices -Si-O-Si- there spheres formed by diameter about 10 {mu}m which are rich in silicon. The effect of terthiophenes unites on SiO2 gels formed shown that birefringence phenomenas are strong in presence of higher quantity oligothiophenes units, and will decrease with increase quantity of alkoxysilane, with anisotropic values differences decrease every 1.125 x 10-3 per mole SiO2, whereas the optical transparency of SiO2 gels formed are increase.
- OSTI ID:
- 21061704
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 909; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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