Photonic crystals in biology - NanoTR-VI

Poster Session, Thursday, June 17Theme F686 - N1123Synthesis of Noncarbon Nanotubes/ conductive Polymer nanocomposite in free solvent mediaG.R. Kiani 1* and A. Rostami 21 Department of Applied Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran2 School of engineering, emerging technologies, University of Tabriz, Tabriz, IranAbstract- Conducting polymer/ halloysite nanotubes composite were obtained by a mechanochemical reaction in thesolid state by milling system. The halloysite nanotubes(HNT) were coated with 2, 5- dithienyl pyrrole(SNS) via thein situ chemical oxidation polymerization. The characterization by transmission electron microscopy showed thatthe nanotubes were completely covered with conducting polymer. The nanocomposite was characterized usingFTIR, X-ray diffraction, TGA and transmission electron microscopy. The conductivity of the nanocomposite wasfound to be 0.0066 (cm) -1 . (HNT) provide a new avenue for the preparation of nanocomposites.Conducting polymer nanotubes have recentlybecome the object of numerous investigationsbecause of their great potential in deviceapplications, such as transistors [1], sensors [2],actuators and batteries [3], and so on. Holloysite hasa wide variety of biological and non-biologicalapplications. It has been used for storing molecularhydrogen [4], for catalyst conversions andprocessing of hydrocarbons [5] and for removingenvironmental hazardous species [6].HNT and SNS in the presence of ammoniumpresulphate were placed in the ball milling apparatusand the mixture was milled for 30 minute at roomtemperature (25 Hz). The black powder of HNT-SNSnanocomposite was washed with water, and ethanol,then the dried in vacuum.TEM images of halloysite nanotubes (HNT) andHNT-SNS show that the halloysite nanotubes werecoated with 2, 5- dithienyl pyrrole(SNS) via the insitu chemical oxidation polymerization. Also it isobvious that the poly SNS layer with the thickness ofabout 40 nm was only coated onto the outer surfacesof the HNTs.Figure2: FT-IR spectras of a) HNT b) HNT-SNS nanocompositeThe conductivity of the HNT-SNS nanocompositewas found to be 0.0066 (cm) -1 and the conductivityvalue was acceptable.Figure1: TEM images of a) HNT b) HNT-SNS nanocomposite.Figure 2 shows the IR spectra of HNT, HNT-SNSproduct. The bands at 790 and 750 cm 1 in the HNTspectrum are assigned to the translational vibrationsof the external OH groups as well as the out-of-planeOH bending according to the literature. Also thebands in 1600 and 3500 cm -1 for SNS in Fig 2bshows C=C and N-H respectively.Fig. 3 shows the XRD for the HNT andnanocomposite. It is obvious that the SNS has anamorphous structure so that it appears in 15-35 (2)in the nanocomposite structure.Figure 3: X-ray diffractograms of HNT and HNT-SNS.In summary, HNT/ conducting polymernanocomposite were synthesized first time usingmilling system and its characteristics weredetermined. The halloysite nanotubes offer analternative to carbon nanotubes due to their viabilityand low cost.*Corresponding author: kiani1348@gmail.com andkiani_gholamreza@yahoo.com[1] A.N. Aleshin, Adv. Mater. 18, 17 (2006).[2] M. Kanungo, A. Kumar and A.Q. Contractor, Anal. Chem. 758,5673 (2003).[3] R.H. Baughman, Science 308, 63 (2005).[4] X. Wang and M. L. Weiner US Patent Specification0233199 (2005)[5] R. Klimkiewicz and B. D. Edwarda J. Phys. Chem.Solids 65 459 (2004).[6] Z. Lin and R. W. Puls Environ. Geol. 39 753(2000).6th Nanoscience and Nanotechnology Conference, zmir, 2010 720