Rajapalaiyam, India
Rajapalaiyam, India

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Shameem A.,Kalasalingam University | Devendran P.,Kalasalingam University | Siva V.,Kalasalingam University | Raja M.,Rajapalayam Rajus College | And 2 more authors.
Journal of Inorganic and Organometallic Polymers and Materials | Year: 2017

This work reports the preparation of cadmium oxide (CdO) thin films with different molar concentrations on glass substrate by simple and low cost SILAR (Successive Ionic Layer Adsorption and Reaction) method. The characterization, XRD pattern confirmed the presence of polycrystalline CdO in the deposited thin films with the cubic structure. The surface morphology and elemental composition of prepared thin films have been examined by scanning electron microscopy equipped with energy dispersive X-ray (EDX) analysis system. The optical property of the films was analyzed by UV–visible spectroscopy. The band gap of the deposited thin films was estimated by Tauc’s plot and it was found to be 2.6–2.8 eV. The prepared thin films were examined for the decomposition of the Methylene Blue (MB) dye which was visualized by UV-Visible spectroscopy, by decreasing the intensity of absorbance and concentration. © 2017 Springer Science+Business Media New York


Vijayan C.,Nmss Vellaichamynadar College | Soundararajan N.,Madurai Kamaraj University | Chandramohan R.,Sree Sevugan Annamalai College | Dhanasekaran V.,Alagappa University | And 3 more authors.
Journal of Microscopy | Year: 2011

Semiconducting silver selenide telluride (Ag2SeTe) thin films were prepared with different thicknesses onto glass substrates at room temperature using thermal evaporation technique. The structural properties were determined as a function of thickness by X-ray diffraction exhibiting no preferential orientation along any plane; however, the films are found to have peaks corresponding to mixed phase. The morphology of these films was studied using scanning electron microscope and atomic force microscopy respectively, and is reported. The morphological properties are found to be very sensitive to the thin film thickness. The composition of the films is also estimated using energy dispersive analysis using X-rays and are also reported. © 2011 The Authors. Journal of Microscopy © 2011 Royal Microscopical Society.


Sivaramamoorthy K.,Rajapalayam Rajus College | Asath Bahadur S.,Kalasalingam University | Kottaisamy M.,Kalasalingam University | Murali K.R.,CECRI
Crystal Research and Technology | Year: 2010

CdSxSe1-x films were deposited by the electron beam evaporation technique on glass substrates at different temperatures in the range 30-300 °C using the laboratory synthesized powders of different composition. The films exhibited hexagonal structure and the lattice parameters shifted from CdSe to CdS side as the composition changed from CdSe to CdS side. The bandgap of the films increased from 1.68 to 2.41 eV as the concentration of CdS increased. The root-mean-roughness (RMS) values are 3.4, 2.6, 1.2 and 0.6 nm as the composition of the films shifted towards CdS side. The conductivity varies from 30 ωcm-1 to 480 ωcm-1 as the 'x' value increases from 0 to 1. The films exhibited photosensitivity. The PL spectrum shifts towards lower energies with decreasing x, due to the decrease of the fundamental gap with Se composition. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.


Sivaramamoorthy K.,Rajapalayam Rajus College | Asath Bahadur S.,Rajapalayam Rajus College | Asath Bahadur S.,Kalasalingam University | Kottaisamy M.,Rajapalayam Rajus College | And 2 more authors.
Journal of Alloys and Compounds | Year: 2010

Thin CdS films were electron beam evaporated. The CdS powder synthesized in the laboratory by a chemical method was used as source for the deposition of films. Clean glass substrates were used. The substrate temperature was varied in the range of 30-250 °C. X-ray diffraction studies indicated polycrystalline hexagonal structure. The band gap was 2.39 eV. The grain size was 25-35 nm and the surface roughness was 0.3-1.5 nm with increase of substrate temperature. Photoconductive cells fabricated with the doped and undoped films have exhibited high photosensitivity and high signal to noise ratio. The current voltage characteristics were linear. © 2010 Elsevier B.V. All rights reserved.


Murali K.R.,CSIR - Central Electrochemical Research Institute | Kalaivanan A.,Arignar Anna College | Sivaramamurthy K.,Rajapalayam Rajus College | Perumal S.,Sthindu College
ECS Transactions | Year: 2012

Aluminium doped ZnO films were deposited by the sol gel dip coating method. The crystalline quality decreased with increase of Al doping. The band gap varies from 3.32 eV to 3.56 eV with increase of Al doping. This blue shift behavior or broadening in the band gap is mainly due to the Moss-Burstein band filling effect. The films exhibited 60-70% transmission in the visible region. The grain size and surface roughness varied from 45 nm to 15 nm and 3.5 nm to 1.3 nm respectively. The intensity of the Raman peaks at 331, 385, 438 and 582 cm-1 modes decreased with increasing the Al concentration. ©The Electrochemical Society.


Kalaivanan A.,Arignar Anna College | Perumal S.,Sthindu College | Sivaramamoorthy K.,Rajapalayam Rajus College | Murali K.R.,CSIR - Central Electrochemical Research Institute
Proceedings of the International Conference on Nanoscience, Engineering and Technology, ICONSET 2011 | Year: 2011

ZnO films were deposited on cleaned glass substrates from AR grade zinc chloride, acrylamide, bisacrylamide and ammonium persulphate. X-ray diffraction studies indicated the major diffraction peaks decreased with increasing the Al concentration. For doping with aluminium, 0.01M of AlCl 3 was introduced in the deposition mixture. The band gap varies from 3.16 eV to 3.20 eV with increase of Al doping. This blue shift behavior or broadening in the band gap is mainly due to the Moss-Burstein band filling effect. The grain size and surface roughness varied from 45 nm to 15 nm and 3.5 nm to 1.3 nm respectively with increase of aluminium concentration. The electrical resistivity of the films decreases with increase of Al doping by three orders of magnitude. The mobility and carrier density increase with Al doping. Comparing the Al doped ZO with the undoped ZnO films, A1(TO) and E1 (LO)modes are shifted to the high frequency side in the Raman spectrum. © 2011 IEEE.


Sivaramamoorthy K.,Rajapalayam Rajus College | Perumal S.,Sthindu College | Kalaivanan A.,Arignar Anna | Murali K.R.,CSIR - Central Electrochemical Research Institute
Proceedings of the International Conference on Nanoscience, Engineering and Technology, ICONSET 2011 | Year: 2011

CdO thin films have great technological interest due to their high-quality electrical and optical properties. Mixed oxides of CdO have been used in photovoltaic devices, gas sensors, phototransistors etc. In this work, the Acrylamide route was used to deposit CdO: In films. XRD patterns of the undoped and indium-doped CdO films exhibit cubic structure of the cadmium oxide with five characteristic peaks assignable to the (111), (200), (220), (311) and (222) planes. The intensity of the peaks decreases and the full-width at half-maximum (FWHM) increases as the indium content increases. The resistivity of the films decreases by two orders with Indium doping. It is observed that all the deposited films exhibited high transmission of about 70-90% in the visible range of 500-600 nm. The value for CdO film without doping is 2.41 eV, while the doping of 6 at wt% indium results in an increase of band gap to 2.97 eV. Surface morphology studies with Atomic force microscope indicated the formation of nanocrystallites with surface roughness around 0.3 nm. © 2011 IEEE.


Suriakala P.,Rajapalayam Rajus College | Tamilarasan K.,Kongu Engineering College
Advanced Materials Research | Year: 2014

Zinc doped nano ceria powders were prepared by a simple and fast microwave induced combustion method using cerium nitrate, zinc nitrate, glycine and sorbitol. The resultant powders were examined for their structure and microstructure by XRD, SEM, TEM and their optical properties were measured by UV-Vis spectroscopy. The lattice parameter of the ceria powders was found in the range of 5.399 Å to 5.370 Å. The average crystallite size calculated from XRD was in the range ~ 4 nm to ~ 2.5 nm. The TEM selected area diffraction pattern images clearly showed the ring pattern indicated the powders were polycrystalline nature and there is agglomeration of the particles. Optical band gaps of the powders were in the range 2.71eV to 2.58eV. © (2014) Trans Tech Publications, Switzerland.


Suriakala P.,Rajapalayam Rajus College | Tamilarasan K.,Kongu Engineering College | Kanagasabapathy M.,Rajapalayam Rajus College
International Journal of ChemTech Research | Year: 2015

Microwave induced combustion method was employed for the preparation of nickel mixed ceria nanocrystalline powder using cerium nitrate, nickel nitrate, glycine and sorbitol. Subsequently, three different molar composition of cerium nitrate was mixed with constant proportion of nickel nitrate, glycine and sorbitol to synthesis three samples. The resultant samples were analysed for structural, morphological and spectral characteristics using XRD, SEM, TEM, FTIR and UV-Vis spectroscopy. The crystallite sizes were about in the nano range of 27nm, 5nm & 4nm. There was a decrease in lattice parameter in the order of 5.4089A˚, 5.3921A˚ & 5.4014A˚. Degree of lattice distortion depends on NiO content in the ceria lattice. The FTIR spectrum shows the existence of groups such as –NO2 , –OH and C–H due to the solubility of nickel material. The absorption band is extended up to visible region in UV-Vis spectrum due to the substitution of Ni ion. © 2015, Sphinx Knowledge House. All rights reserved.


Perumal Raja S.,Rajapalayam Rajus College | Karppusamy T.,Kongu Engineering College
Medziagotyra | Year: 2016

Nano CexMyO1-x+y (M = Zn, Mg and Ni) materials were prepared for the applications of spintronic devices by microwave induced combustion process using cerium nitrate, zinc nitrate, magnesium nitrate and nickel nitrate as a starting materials and sorbitol and glycine used as a fixed ratio of fuel. The structural properties of all samples were analyzed by XRD, SEM and TEM. The crystallite size was found in the nano ranges in the order of 27 nm to 3 nm and their lattice parameters are in the range of 5.3739A˚ to 5.4479A˚. These structural parameters are affected by amount of fuel ratio, nature of materials integrated and preparation method. The optical properties were examined via UV-Vis spectroscopy. The variation of the band gap energy was due to concentration of the grain boundaries, which depends on the type of mixing materials. The magnetic nature of the prepared samples was studied by Vibration Sample Magnetometer (VSM). The VSM results show the existence of weak ferromagnetic and paramagnetic nature of ceria nanocrystallite materials which is also depending on the incorporation of various materials. © Kauno Technologijos Universitetas. All rights reserved.

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