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We have shown that the morphological features of the sol–gel derived thin films of ZnO depend strongly on the choice of the precursor materials. In particular, we have used zinc nitrate and zinc acetate as the precursor materials. While the films using zinc acetate showed a smoother topography, those prepared by using zinc nitrate exhibited dendritic(More)
This paper reports the design of a Ka-band Equilateral triangular patch antenna (ETPA) fabricated using post-CMOS and post-MMIC compatible process technology. The antenna uses an air-cavity underneath the patch radiator that is supported on thin dielectric membrane. The antenna structure was analysed and optimised using the finite element method (FEM) based(More)
The fungi described in this paper were isolated during the course of a detailed survey of leaf-spot diseases of Allahabad and adjacent regions. A comparative s tudy indicated the forms reported here viz., Colletotrichum sp. from Sapindus lauri/olius VAHL., Pyrenochaeta sp. from Gardenia florida L. and Phoma sp. from Ehretia acuminata BR., to be distinct(More)
crrb J0 c Fig. 1. Chrono-isoplets indicating distribution of moisture at various depths at positions (a) below the tree, (b) between two trees and (e) away from the tree grove. Solid circles indicate the positions of gypsum blocks and the figures against them indicate the moisture percentages. Ordinate: depth in cm, (0 =surface). Moisture: ~ < 1 . 0 % , [ ~(More)
The sensor for detection of ethanol vapours using RF sputter deposited ITO thin film on glass and Si substrates is reported. The principle of operation is the change of resistance of ITO film on exposure to ethanol vapours. The films were annealed at 450 &#x0BA;C for 1h in air. The films were extensively characterized for their structural properties using(More)
In the present work, we report the preparation of PLZT thin films in pure perovskite phase by RF magnetron sputtering without external substrate heating and their integration with micro-cantilevers. The 'lift-off' process for pat-terning different layers of a micro-cantilever including PLZT, Pt/Ti and Au/Cr was employed. The basic requirement of lift-off(More)
of Philosophy in Electrical Engineering is a bona fide work carried out by him under my supervision. The work reported in this thesis, in my view has reached the magnitude and standard for submission and for staking the candidate's claim for the award of Ph.D Degree in Engineering. The research reports and the results presented in this thesis have not been(More)
The endosperm is nuclear, cell wall initiation starts 5 days after pollination. During early stages endosperm nuclei exhibit synchrony in their division. Embryogeny is of the Asterad type. A7-to 10-celled suspensor persists up to the dicot stage of the embryo. Both integuments contribute towards formation of the seed coat. 30 days after pollination seeds(More)