By a News Reporter-Staff News Editor at Electronics Newsweekly -- Researchers detail new data in Nanoparticles. According to news reporting out of Seoul, South Korea, by VerticalNews editors, research stated, "We report on the fabrication of organic thin film transistors (OTFTs), which operate at low voltages, by incorporating a nanocomposite gate insulator material consisting of titania (TiO2) nanoparticles used as fillers and poly(4-vinyl phenol) (PVP) used as matrix. The surface of the nanoparticles was modified by the ligands, 4-hydroxybenzoic acid, to enhance their compatibility with the polymer."
Our news journalists obtained a quote from the research from Seoul National University, "The structure of the ligand is similar to that of the repeat units in the polymer. Once the nanoparticles were homogeneously dispersed in the polymer matrix, they were immobilized by cross-linking PVP with poly(melamineco- formaldehyde) methylated/butylated (cross-linker). Consequently, no significant aggregation of the nanoparticles, even at a concentration of 31 wt%, was found in the nanocomposites, as observed by transmission electron microscopy (TEM). As a result, the nanocomposite exhibited a low leakage current density (similar to 10(-8) A/cm(-2)). With an increase in the concentration of TiO2 nanoparticles added, the dielectric constant of the nanocomposites also increased proportionately as compared to that of pristine PVP. The performance of the OTFTs in terms of the charge carrier mobility, on/off ratio, threshold voltages, and hysteresis was evaluated."
According to the news editors, the research concluded: "In addition, the relationship between the concentration of TiO2 nanoparticles and the device performance is discussed in detail."
For more information on this research see: TiO2-poly(4-vinylphenol) nanocomposite dielectrics for organic thin film transistors. Organic Electronics, 2013;14(12):3406-3414. Organic Electronics can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Organic Electronics - www.elsevier.com/wps/product/cws_home/620806)
Our news journalists report that additional information may be obtained by contacting Y.J. Kim, Seoul National University, Grad Sch Convergence Sci & Technol, Dept. of Nano Sci & Technol, Seoul 151742, South Korea. Additional authors for this research include J. Kim, Y.S. Kim and J.K. Lee.
Keywords for this news article include: Asia, Seoul, South Korea, Dielectrics, Electronics, Nanocomposite, Nanotechnology, Emerging Technologies
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