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Coimbatore, India

Shekar B.C.,Nanotechnology Research Laboratory | Kannan S.C.,Nanotechnology Research Laboratory | Sengodan R.,Kumaraguru College of Technology | Dinesh K.P.B.,Sree Narayanaguru College | Ranjithkumar R.,P.A. College
International Journal of Polymer Analysis and Characterization | Year: 2015

Wide band gap transparent polymer-inorganic (PVA-ZnO) composite thin films were prepared by the dip-coating method. Functional groups and metal oxide vibrations were found from Fourier transform-infrared spectroscopy. The elements Zn and O were confirmed from energy dispersive X-ray spectroscopy. The X-ray diffraction patterns revealed that the sharp diffraction peaks correspond to the hexagonal wurtzite structure of ZnO in the PVA matrix. Scanning electron microscopy images showed that the ZnO nanoparticles are randomly distributed throughout the entire film surface. The optical study reveals that the transmittance was more than 85% with very low absorption and wide band gap energy (4.03 to 3.95 eV). The obtained results indicate that the high transmittance, very low absorption, and wide band gap energy of the prepared dip-coated composite thin films make them suitable for use in transparent optoelectronic device applications in the near future. Copyright © Taylor & Francis Group, LLC. Source


Bellan C.S.,Mills College | Muthu D.,Bharathiar University | Raja S.,Kumaraguru College of Technology | Bheeman D.,Sree Narayanaguru College | Rajamani R.,Dr Nalla Goundar Palaniswami Arts And Science College
Polymers for Advanced Technologies | Year: 2015

New hybrid Poly (vinyl) alcohol (PVA)-InTiO transparent thin film was prepared by dip-coating method. Characteristic of M-O vibrations (In-O and Ti-O) were confirmed from Fourier transform infrared spectroscopy. The X-ray diffraction patterns revealed that the mixed phases of rutile TiO2 and cubic In2O3 were present in the hybrid film. Scanning electron microscopy images showed spherical shape mixed In2O3 and TiO2 nano particles embedded in the polymer matrix. The presence of elements such as In, Ti, and O are confirmed from energy dispersive X-ray spectroscopy. High transmittance (80%) and wide band gap energy (4.1 to 3.75 eV) values were observed from optical study. High dielectric constant (18 to 23) and low dielectric loss values were obtained from dielectric study. The observed amorphous nature, enhanced optical, and dielectric properties indicated that the hybrid thin film could be used as high-k{cyrillic} layer in transparent thin film transistor and in opto-electronic device applications in near future. © 2015 John Wiley & Sons, Ltd. Source


Bheeman D.,Sree Narayanaguru College | Sugumaran S.,Mills College | Mathan R.,Bharathiar University | Sivanesan D.,Georgetown University | Bellan C.S.,Mills College
Nanoscience and Nanotechnology Letters | Year: 2014

In the present study, we have synthesized, characterised indium titanium oxide nanoparticles (InTiO NPs) by sequential manner using FTIR, XRD and TEM-EDS methods and analysed its toxic nature by investigating biochemical, antioxidants and histopathology in albino rats. TEM analysis revealed that the average size of the InTiO is 58.25 nm. Oral administration (50 mg/Kg) of InTiO NPs to albino rats showed significant alterations in serum glutamate oxaloacetate transaminase (SGOT), glutamate private transaminase (SGPT), alkaline phosphatise (ALP), total and direct bilirubin (TB and DB), antioxidants glutathione (GSH), catalase (CAT), glutathione peroxidise (GPx), superoxide dismutase (SOD), lipid per oxidation (LPO) and total protein (TP) status relative to control groups. InTiO NPs exposed liver tissues showed marked structural alterations such as necrosis, degeneration of hepatocytes. The results of the present investigation indicate that the mechanism for InTiO NPs induced toxicity includes alteration in biochemical, antioxidants and histopathology might have been resulted from oxidative stress caused by the nanoparticles. Copyright © 2014 American Scientific Publishers All rights reserved. Source


Bellan C.S.,Mills College | Muthu D.,Bharathiar University | Raja S.,Kumaraguru College of Technology | Bheeman D.,Sree Narayanaguru College | Rajamani R.,P.A. College
RSC Advances | Year: 2015

Novel hybrid poly(vinyl alcohol)-indium zinc oxide (PVA-InZnO) thin films were prepared by a simple and cost effective dip coating method and Al/PVA-InZnO/Al sandwich capacitor structure was prepared by using thermal evaporation and dip coating methods. Fourier transform infrared spectra showed the characteristic peaks correspond to metal-oxide bonds present in the films. The X-ray diffraction patterns revealed the existence of mixed phase cubic In2O3 and hexagonal wurtzite ZnO with polycrystalline structure. The scanning electron microscope images showed uniform distribution of In2O3 and ZnO nanoparticles over the entire film surface. High transmittance (50 to 80%), low absorbance, wide band gap energy (4.1 to 3.75 eV) and low α and k were obtained from an optical study. High dielectric constant, low dielectric loss and low activation energy were obtained from Al/PVA-InZnO/Al. The obtained results suggested that these prepared hybrid thin films could be used as hybrid gate dielectric layer in transparent organic thin film transistors (T-OTFT's) and in opto-electronic devices in the near future. © The Royal Society of Chemistry 2015. Source


Bheeman D.,Sree Narayanaguru College | Krishna J.,Sree Narayanaguru College | Sugumaran S.,Nanotechnology Research Laboratory | Mathan R.,Bharathiar University | And 3 more authors.
Journal of Bionanoscience | Year: 2014

Pharmacognosy of Aegle marmelose (AM) leaf extract against indium titanium oxide nanoparticles (InTiO NP) induced liver toxicity was investigated. Significant alterations were seen in the biochemical markers such as serum glutamate oxalate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), alkaline phosphatase (ALP), total and direct bilirubin (TB and DB) when exposed to InTiO NP. Likewise, antioxidants such as glutathione (GSH), catalase (CAT), glutathione peroxidase (GPx) and lipid peroxidation (LPO) and total protein (TP) status were also altered relative to control group. Liver tissues exposed to InTiO NPs showed noticeable liver damages. Phytochemistry of AM leaf extract demonstrated the presence of alkaloids, flavonoids, tannins etc. Ameliorative efficacy of AM leaf extract reversed the biochemical, antioxidants and pathological alterations inflicted by InTiO NPs. Copyright © 2014 American Scientific Publishers Source

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