PUNEET MISHRA - Academia.edu (original) (raw)

Papers by PUNEET MISHRA

The reader assumes all risk of use of this book and of all information, theories, and programs co... more The reader assumes all risk of use of this book and of all information, theories, and programs contained or described in it. This book may contain technical inaccuracies, typographical errors, other errors and omissions, and out-of-date information. Neither the author nor the publisher assumes any responsibility or liability for any errors or omissions of any kind, to update any information, or for any infringement of any patent or other intellectual property right. Neither the author nor the publisher makes any warranties of any kind, including without limitation any warranty as to the sufficiency of the book or of any information, theories, or programs contained or described in it, and any warranty that use of any information, theories, or programs contained or described in the book will not infringe any patent or other intellectual property right.

By the evolution in trade and technology the most effective zoneis environment due to which publi... more By the evolution in trade and technology the most effective zoneis environment due to which publics grieve from lot of health diseases such as Breathing problem, Blood pressure (BP), Lungs difficulty etc. Instead of accessing a doctor regular now a day’s home use medical health care kits are offered which provide admittance to regular monitoring of vital signs and direct report lead at doctor desktop for further processing. This paper presents a novel approach in crafty the signal conditioning circuit entail of amplifier and noise reduction stages for the signal in health care instrument thatleads in the precise results of patient such as Body Temperature, Air flow measurement, Electromyography (EMG), Blood pressure (BP),Spirometer with associated to the health care kit of My signal named as Libelium. In forthcoming the device can be ended of slow charge using this SCC circuit with various sensors and arise into the budget of everyone whichever underprivileged or intermediate class ...

Vacuum, 2008

We report the investigation of morphology and composition of copper nanocluster films deposited o... more We report the investigation of morphology and composition of copper nanocluster films deposited on Si substrates. The nanoclusters are formed in an aggregation tube at room temperature and magnetron sputtering source is used to get negatively charged Cu-clusters' beam which is subsequently massfiltered to get size-selected cluster on the substrates as soft-landing process of deposition. For composition of the films, X-ray photoelectron spectroscopy (XPS) technique is used. For morphological changes of the films both scanning electron microscopy (SEM) and atomic force microscopy (AFM) analyses are carried out. Additionally, Energy Dispersive X-ray (EDX) spectra support the compositional and structural informations of the film. The analysis of Cu nanoclusters' films reveals that initial nucleation of Cu clusters takes place in the form of isolated islands and the arrival of subsequent Cu clusters onto Si substrates has preferential aggregation around the preceding clusters forming a mound structure.

Physical Review Letters, 2011

Macroscopic and robust supercurrents are observed by direct electron transport measurements on a ... more Macroscopic and robust supercurrents are observed by direct electron transport measurements on a silicon surface reconstruction with In adatoms (Si(111)-(R7xR3)-In). The superconducting transition manifests itself as an emergence of the zero resistance state below 2.8 K. I−VI-VI−V characteristics exhibit sharp and hysteretic switching between superconducting and normal states with well-defined critical and retrapping currents. The two-dimensional (2D) critical current density Jmathrm2D,cJ_\mathrm{2D,c}Jmathrm2D,c is estimated to be as high as 1.8mathrmA/m1.8 \ \mathrm{A/m}1.8mathrmA/m at 1.8 K. The temperature dependence of Jmathrm2D,cJ_\mathrm{2D,c}Jmathrm2D,c indicates that the surface atomic steps play the role of strongly coupled Josephson junctions.

Applied Physics Letters, 2011

The magnetic ordering in ultrathin Mn films grown on Fe (100) substrates is studied using spin-po... more The magnetic ordering in ultrathin Mn films grown on Fe (100) substrates is studied using spin-polarized scanning tunneling microscopy/scanning tunneling spectroscopy. Enhancement of spin contrast is observed due to a tip modification. Detailed analysis ...

Physical Review B, 2011

One-dimensional (1D) stripe structures with a periodicity of 1.3 nm are formed by introduction of... more One-dimensional (1D) stripe structures with a periodicity of 1.3 nm are formed by introduction of stacking fault arrays into a Ag thin film. The surface states of such striped Ag thin films are studied using a low temperature scanning tunneling microscope. Standing waves running in the longitudinal direction and characteristic spectral peaks are observed by differential conductance (dI/dV) measurements, revealing the presence of 1D states on the surface stripes. Their formation can be attributed to quantum confinement of Ag(111) surface states into a stripe by stacking faults. To quantify the degree of confinement, the effective potential barrier at the stacking fault for Ag(111) surface states is estimated from independent measurements. A single quantum well model with the effective potential barrier can reproduce the main features of dI/dV spectra on stripes, while a Kronig-Penney model fails to do so. Thus the present system should be viewed as decoupled 1D states on individual stripes rather than as anisotropic 2D Bloch states extending over a stripe array.

Physical Review B, 2010

Au films grown on striped substrates [Ag/Si (111)-(4× 1)-In] acting as an atomic-scale geometrica... more Au films grown on striped substrates [Ag/Si (111)-(4× 1)-In] acting as an atomic-scale geometrical template were studied by scanning tunneling microscopy, low-energy electron diffraction and Auger electron spectroscopy. The two-step growth method, consisting of ...