M. Rynaldi Iqbal, Isnindar Tandya Asri, Harsipah, Sajida Rakhmah, Markus Diantoro, Yudyanto
Indonesia has many plants that contain flavonoids such as leaves or latex trunk from Angsana tree (Pterocarpus indicus Willd, PIW). To improve electrical properties, we can use several dopants such as protonation or introduce metal ions into the flavonoid of PIW extract. In our previous studies, we use silver nanoparticles in flavonoid films to increase the conductivity. It is rarely found the use of optical dielectric material such as TiO2 induced in flavonoid. Flavonoid extraction from PIW latex was performed using the maceration method. Separately, we also prepared TiO2 nanoparticle using the coprecipitation method. Meanwhile, the dissolving process of flavonoids and TiO2 nanoparticle was carried out in an aquadest solvent with PEG 400. The FTIR spectrum shows the type of rutin. Analysis of XRD patterns showed an increase in the crystallinity of composite flavonoid-TiO2 film along with the addition of TiO2 nanoparticles. The SEM image shows that the TiO2 nanoparticles are dispersed on the surface of the flavonoid-TiO2 film. The dielectric constant of flavonoid film without TiO2 nanoparticle dopant is 1.05×104. The dielectric constant with 0.05 grams of TiO2 nanoparticle decreased to 75.8. © Published under licence by IOP Publishing Ltd.
Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia; Central Laboratory of Minerals and Advanced Materials, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia
