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Salipur, India

Dash B.N.,Salipur College | Dash B.N.,Utkal University | Mallick P.,North Orissa University | Mallick P.,Utkal University | And 6 more authors.
Bulletin of Materials Science | Year: 2013

BiFeO3 (BFO) thin films of thickness about 800 nm deposited on Si (100) substrates by sol-gel spin coating method were irradiated by 200 MeV Ag ions. Modification of structure and surface morphology of the films under irradiation was studied using glancing incidence X-ray diffraction (GIXRD) and atomic force microscope (AFM). Fluence dependence of GIXRD peak intensity indicated formation of 10 nm diameter cylindrical amorphous columns in crystalline BFO due to 200 MeV Ag ion irradiation. AFM analysis indicated that the pristine film consists of agglomerated grains with diffuse grain boundary. Irradiation led to reduced agglomeration of the grains with the formation of sharper grain boundaries. The rms roughness (srms) estimated from AFM analysis increased from 6.2 in pristine film to 12.7 nm when the film irradiated at a fluence of 1 × 1011 ions cm-2. Further irradiation led to decrease of srms which finally saturated at a value of 7-8 nm at high ion fluences. The power spectral density analysis indicated that the evolution of surface morphology of the pristine film is governed by the combined effect of evaporation condensation and volume diffusion processes. Swift heavy ion irradiation seems to increase the dominance of volume diffusion in controlling surface morphology of the film at high ion fluences. © Indian Academy of Sciences.

Panda S.,Salipur College | Patra A.K.,Utkal University | Mohanty S.K.,State Pollution Control Board
Asian Journal of Water, Environment and Pollution | Year: 2012

A study has been taken to evaluate the impact of industrial waste generated from different industries existing in Jagatpur Industrial Estate on river Mahanadi. Samples were collected from final discharge point to river Mahanadi of different industries as well as upstream and downstream of river Mahanadi to Jagatpur Industrial Estate. Samples were collected in three seasons. The results obtained at U/S and D/S points on river Mahanadi in different seasons (winter, summer and rainy) has been compared graphically. From the seasonal variation it was observed that almost all parameters are in increasing trend. In the rainy season, yearly average value at the D/S point is quite high as compared to yearly value at U/S point. The high values in rainy season is due to washing of waste dumping near Mahanadi bed. Quality Ratings for different parameters has been calculated from that water quality index was found out and compared. From the results it is concluded that, due to industrial waste discharge, water quality of river Mahanadi is deteriorated at the D/S point on river Mahanadi and the results are not meeting the prescribed standard for drinking water under Class A.

Baral K.C.,Salipur College
Journal of Physics: Conference Series | Year: 2010

The Fokker-Planck equation is used to treat the large angle as well as small angle ion-electron collision in relativistic magneto- plasma having anisotropy in temperature. The relevant collision integrals are formulated with the introduction of an appropriate equilibrium distribution function. The kinetic equation is derived from first principle and Chapmann-Enskog type of approximation is employed to derived the modified expressions for the first order perturbed distribution function f11+ and the corresponding diffusion drift velocity (Ud) exhibiting the effects of anisotropy in temperature. © 2010 IOP Publishing Ltd.

Dash B.N.,Salipur College | Dash P.,Utkal University | Rath H.,Utkal University | Mallick P.,North Orissa University | And 3 more authors.
Indian Journal of Physics | Year: 2010

We report the preparation of multiferroic BiFeO3 thin films on ITO coated glass substrates through sol-gel spin coating method followed by thermal annealing and their modification by swift heavy ion (SHI) irradiation. X-ray diffraction and Raman spectroscopy studies revealed amorphous nature of the as deposited films. Rhombohedral crystalline phase of BiFeO3 evolved on annealing the films at 550°C. Both XRD and Raman studies indicated that SHI irradiation by 200 MeV Au ions result in fragmentation of particles and progressive amorphization with increasing irradiation fluence. The average crystallite size estimated from the XRD line width decreased from 38 nm in pristine sample annealed at 550°C to 29 nm on irradiating these films by 200 MeV Au ions at 1 × 1011 ions cm-2. Complete amorphization of the rhombohedral BiFeO3 phase occurs at a fluence of 1 × 1012 ions.cm-2. Irradiation by another ion (200 MeV Ag) had the similar effect. For both the ions, the electronic energy loss exceeds the threshold electronic energy loss for creation of amorphized latent tracks in BiFeO3. © 2010 IACS.

Torasia S.N.,Government of Odisha | Rout D.K.,Salipur College
Advanced Science Letters | Year: 2014

A sample of Keratin obtained from the horn of Sambar of Indian origin has been investigated in its air dried form by Small Angle X-Ray scattering method. The sample is treated with 0.01 N, 0.1 N and N-alkali solution for 14, 28 and 45 days, respectively and the derivatives so obtained are investigated. The small angle Kratky camera is used for the recording of scattered intensity. The macromolecular parameters like specific inner surface, transversal lengths, void fraction and the coherence lengths for the air dried sample as well as alkali treated samples are estimated using Kratky and Porod theory of small angle scattering. It is observed that due to prolonged treatment with strong alkali solution (N-alkali), the sample loses its two phase characteristics and hence Porod's theory is inapplicable for analysis of such sample. © 2014 American Scientific Publishers All rights reserved.

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