Colloidal properties of surface functionalized nanocube-TiO2/poly(3-octylthiophene) core/shell conducting nanocomposite

Sever E., ÜNAL H. İ.

APPLIED SURFACE SCIENCE, cilt.355, ss.1028-1036, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 355
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.apsusc.2015.07.013
  • Dergi Adı: APPLIED SURFACE SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1028-1036
  • Anahtar Kelimeler: Nanocube titanium dioxide, Poly(3-octylthiophene), Self-assembly, Core/Shell structure, Electrokinetics, Surface functionalization, ELECTRORHEOLOGICAL FLUID, POLYMER, NANOPARTICLE, POLY(3-OCTYLTHIOPHENE), POLYTHIOPHENES, PHOTOVOLTAICS, COMPOSITE, AGENT, FILMS
  • Gazi Üniversitesi Adresli: Evet

Özet

The aim of this study was to prepare a conducting nanocomposite from poly(3-octylthiophene, P30T) and nanocube-TiO2 particles. For this purpose, firstly nanocube-TiO2 particles were synthesized by hydrothermal method and then surface functionalized by the self assembly of 3-aminopropyltriethoxysilane and 3-thiophene acetic acid, respectively, to obtain covalently bonded nanocube-TiO2/P3OT core/shell nanocomposite. The samples were characterized by ATR FTIR spectroscopy, elemental analysis, TGA, XRD, XPS, SEM, TEM, contact angle, and conductivity measurements. Electrokinetic properties of nanocube-TiO2 and nanocube-TiO2/P3OT core/shell nanocomposite dispersions were determined by zeta(zeta)-potential measurements in aqueous medium by taking the effects of time, pH, various electrolytes, surfactants, and temperature into account. It was observed that pH was effective on the zeta-potentials of TiO2 in water; but showed slight changes with the presence of cationic (NaCl, BaCl2, AlCl3) and anionic (NaCi, Na2SO4) electrolytes. Increased pH values were observed to shift the zeta-potentials of TiO2/P3OT nanocomposite dispersions to more negative values. Further, effects of surfactants (sodium dodecyl sulfate, SDS, cetyltrimethylbromide, CTAB, TritonX-100) on the zeta-potentials of nanocube-TiO2 and nanocube-TiO2/P3OT nanocomposite dispersions were examined. (C) 2015 Elsevier B.V. All rights reserved.