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Influence of 1D polymer network in TiO2 nanoparticles/P3HT nanofibril blends

Ananthakumar Susaimanickam ,  Ramkumar Jeyagopal ,  Moorthy Babu Sridharan 

Crystal Growth Centre, Anna University, Chennai, Chennai 600025, India

Abstract
Titanium-di-oxide (TiO2) nanoparticles were synthesized using non aqueous sol-gel route through oleic acid as the medium and capping agent.  Pyridine was used to treat the prepared TiO2 nanoparticles to remove the oleic acid from the surface. This surface treated nanoparticles were allowed to make the blend with Poly-3-hexyl thiophene (P3HT) nano fibrils in chloroform. P3HT nanofibrils were prepared by the solvent induced self assembly method with the addition of acetone.  These blends were analysed using UV-Visible, PL , SEM and AFM analysis. The optical properties of the fibril P3HT with TiO2 nanoparticles was compared with pristine P3HT/TiO2 nanoparticles blend. Enhancement of absorption of P3HT was observed from UV-Visible analysis  when  acetone was added with  chloroform. The emergence of new bands of P3HT after addition of acetone reveals the formation of fibril structure. Photoluminescence (PL) analysis of the pristine and fibril P3HT polymer with TiO2 nanoparticles confirms the efficient charge separation through quenching of the luminescence.  SEM and AFM analysis further confirms the formation of fibril  structure of the polymer. The suitability of the blends for photovoltaic applications were analysed. The results are discussed in detail. 

      TEM and SAED pattern of    

      TiO2 nanoparticles
 

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Presentation: Poster at 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17, General Session 8, by Ananthakumar Susaimanickam
See On-line Journal of 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17

Submitted: 2013-04-05 19:09
Revised:   2013-04-11 18:03