Photonic crystals in biology - NanoTR-VI

PP andPoster Session, Thursday, June 17Theme F686 - N11231TiOR2R Nanofibers Produced by Electrospinning11UAli E.DenizUP Tamer UyarP P*PUNAM- Institute of Materials Science & Nanotechnology, Bilkent University, Ankara 06800, TurkeyAbstract-TiOR2R nanofibers having anatase structure are obtained by using electrospinning technique and its morphology and structure areanalyzed by SEM, EDX, and XRD.Electrospinning is a versatile and cost-effectivetechnique to produce multi-functional nanofibers fromvarious polymers, sol-gels, metaloxides, ceramics, etc [1].Electrospun nanofibers have several remarkablecharacteristics such as large surface area, nano range poresizes and unique physical and mechanical properties.These superior properties and multi-functionality of thesenanofibers enable them to be used in many areas includingbiotechnology, textiles, filtration, environment and energy[2].Various polymeric nanofibers are produced to be used infuel cells and solar cells [3,4]. By electrospinningtechnique, not only polymeric nanofibers are created butalso inorganic nanofibers can also be obtained. Moreover,these metaloxide nanofibers are very important for energyapplications, for instance, TiOR2R nanofibers can be used isused in solar cell applications [5,6].In this study we produced TiOR2R nanofibers byelectrospinning technique. Titanium dioxide (TiOR2R)nanofibers were obtained by electrospinning of the sol-gelsolution, which contains TiOR2R sol precursor (Titanium(IV)-isopropoxide), polyvinylpyrrolidone (PVP), andsolvent (glacial acetic acid and ethanol). PVP nanofiberswhich include Titanium (IV)-isopropoxide were calcinedat 500 °C for 3 h. After calcination, organic part (polymer,PVP) was totally removed and TiOR2R nanofibers havinganatase structure were obtained. The diameter of the TiOR2Rfibers was in the range of 40 nm to 600 nm.*Corresponding author: HTuyar@unam.bilkent.edu.trT[1] Chronakis I-S, 2005 Novel nanocomposites and nanoceramicsbased on polymer nanofibers using electrospinning process,Journal of Materials Processing Technolog, 167:283-29 [2]Greiner A., Wendorff J-H., 2007 Electrospinning: A FascinatingMethod for the Preparation of Ultrathin Fibers, Angew Chem IntEd.,46:5670–5703[3] Chen Y., Guo J., Kim H.,2010 Preparation of poly(vinylidenefluoride) / phosphotungstic acid composite nanofiber membranesby electrospinning for proton conductivity, Reactive andFunctional Polymers, 70:69-74[4] Chou C., Huang J., Wu C., Lee C., and Lin C.,2009Lengthening the polymer solidification time to improve theperformance of polymer/ ZnO nanorod hybrid solar cells, SolarEnergy Materials and Solar Cells, 93:1608-1612[5] Stathatos E., Chen Y., Dionysiou D-D., 2008 Quasi-solidstatedye-sensitized solar cells employing nanocrystalline TiOR2Rfilms made at low temperature, Solar Energy Materials andSolar Cells, 92:1358-1365 [6] Mane R-S., Hwang Y-H.,Lokhande C-D., Sartale S-D., and Han S., 2005 Roomtemperature synthesis of compact TiOR2R thin films for 3-D solarcells by chemical arrested route, Applied Surface Science,246:271-278a) b)Figure 1. a) SEM Image of PVP nanofibers before calcination b)SEM Image of TiOR2R nanofibers after calcinations.a) b)Figure 2. a) EDX Image of TiOR2 Rnanofibers b) Chemical MapImage of TiOR2R nanofibers. Ti is coloured as a blue colourTAs a conclusion, in this study we have succeeded toproduce TTiOR2R nanofibers having anatase structure byelectrospinning technique.T The morphology of the TTiOR2RnanofibersT was examined by Scanning ElectronMicroscope (SEM)T. The structural Tcharacterization wasperformed by using TEnergy dispersive X-ray analysis(EDX) and X-Ray Diffraction (XRD).6th Nanoscience and Nanotechnology Conference, zmir, 2010 757