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Baraut, India

Pal S.,Mmh College | Kumar R.,Dj College | Singh R.,Mmh College
Journal of Electron Spectroscopy and Related Phenomena | Year: 2012

The modified Jain-Khare semi-empirical formalism for the evaluation of differential and integral electron impact ionization cross sections for molecules has been extended to the evaluation of cross sections for the electron ionization of CO2 clusters: (CO2)240 and (CO2)1700. The energy dependent differential cross sections are evaluated at the incident electron energies of 50, 100 and 200 eV. The integral total ionization cross sections have been calculated in the energy range varying from ionization thresholds to 1000 eV which revealed a good agreement with the available experimental and the theoretical data. The ionization rate coefficients have also been evaluated using the presently calculated ionization cross sections and Maxwell-Boltzmann energy distributions. © 2012 Elsevier B.V. All rights reserved. Source


Singh K.P.,Govind Ballabh Pant University of Agriculture & Technology | Ahalawat S.,Govind Ballabh Pant University of Agriculture & Technology | Prajapati R.K.,Dj College | Kumar S.,JV College | And 2 more authors.
Ionics | Year: 2010

Molecularly imprinted polymer (MIP) membranes were used to develop highly sensitive chemical sensors for the detection of herbicide 2,4-dichlorophenoxy acetic acid (2,4-d). The 2,4-d imprinted composite MIP membranes were prepared, and the characterization was done by UV-VIS spectrophotometer, Fourier transform infrared spectroscopy, and scanning electron microscopy, and the same were fitted in a new electrochemical sensor model. Membrane electroconductivity measurements were performed by applying a small-amplitude alternating voltage (20 mV) with a varying frequency from 20 Hz to 80 kHz generated by a low-frequency wave form generator. The measured changes in the membrane ionic/electric conductivity as a function of 2,4-d concentration was allowed to evaluate the recognition properties of the prepared membrane. This sensor is useful in detecting 2,4-d herbicide having concentration range 10-3 M to 10-6 M. The cross-selectivity of the sensor, reproducibility of results, and reusability of MIP membrane were examined and found remarkable and recommendable. © 2010 Springer-Verlag. Source


Malik J.V.,JV College | Kumar A.,Amity University | Kumar V.,Dj College | Kumar A.,P.A. College | Singh T.P.,JV College
AIP Conference Proceedings | Year: 2013

Thermal effect on photonic band gap (PBG) in dispersive semiconductor based one-dimensional photonic crystal has been investigated. ZnS/air and Ge/air multilayer structures have been taken in our calculation. The refractive indices of both semiconductor layers are taken as a function of temperature and wavelength both. Therefore, this study may be considered to be more physically realistic. The effect of temperature and angle of incidence on reflection spectra of proposed structure for TE polarization has been studied. The PBG can be tuned by varying the temperature of the geometry. The propagation characteristics of the proposed structure are analyzed by the transfer matrix method. © 2013 AIP Publishing LLC. Source


Jain D.,Skk Jain Pg College | Singh K.S.,Dj College | Kumar V.,Dj College | Sharma S.,Gurukul Kangri Vishwavidyalaya | Rao M.P.S.,GMR Institute of Technology
AIP Conference Proceedings | Year: 2013

A simple design of an omni-directional reflector based on Ge/Sio 2 has been presented. The photonic band gap (PBG) of this photonic crystal for TE and TM mode at different angles of incidence is calculated numerically using transfer matrix method. It is found that this type of photonic crystal has omni-direction reflection in near infrared region, which can be used in various application such as deformable mirror, high resolution InAs camera etc. © 2013 AIP Publishing LLC. Source


Kumar V.,JV College | Kumar V.,Dj College | Kumar P.,MS College | Kumar A.,Amity University | Ojha S.P.,IIMT
AIP Conference Proceedings | Year: 2013

A simple design of omni-directional reflector based on one dimensional superconductor-semiconductor photonic crystal has been proposed. The proposed structure consists of a periodic array of alternate layers of YBa 2Cu3O7 or YBCO (superconductor) and Si (semiconductor) as the materials of low and high refractive indices respectively. The refractive indices of YBCO and Si layers are taken as the function of temperature and wavelength both. Therefore, this study may be considered to be more physically realistic. The propagation characteristics of the proposed structure are analyzed by the transfer matrix method. © 2013 AIP Publishing LLC. Source

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