2nd Edition of World Nanotechnology Conference

April 19-21, 2021 | Virtual Event

Scopus Indexed Conference
Phone : 1 (702) 988 2320
Toll Free: 1800–883-8082
Whatsapp: +1 (540) 709-1879
Email: worldnano@magnus-group.org
April 19-21, 2021 | Virtual Event

Pushpendra Tripathi

Speaker for Nanomaterials Conferences
Pushpendra Tripathi
Aligarh Muslim University, India
Title : Transport and thermodynamic properties of ni1-xcexo nanostructures


The conduction characteristics of Ni1-xCexO (x = 0.00, 0.01, 0.03 and 0.05) nanostructures prepared by the sol-gel method have been investigated through DC and AC measurements. The dielectric relaxation in this system have also been  discussed as a function of both of frequency (75 kHz to 1 MHz) and temperature (30 0C to 300 0C). In the light of several theoretical models, the AC conductivity has been analyzed using a power law   σ_ac∝ω^s (s< 1), where frequency exponent ‘s’ has been examined as a function of temperature. The experimental and theoretical investigations confirmed that the AC conduction mechanism in all samples could be successfully described by non-overlapping small polaron tunneling model and correlated hopping model (bipolaron hopping over single polaron hopping) which provided reasonable physical parameters such as polaron hopping energies (WH and WM), characteristic relaxation time (  =10−13 s), tunnelling distance (Rw) and density of states at Fermi level (N(EF)) as well   as the concentration of a pair of defects sites (N), respectively. Besides this, based on specific heat and change in enthalpy (ΔH), it suggests that less heat generated in Ce doped NiO when compared to pure NiO nanoparticles.


Dr. Tripathi completed his PhD at the age of 29 years from The M.S. University of Baroda, Vadodara, India and postdoctoral studies from  University of  Essex, UK.  He is working as senior Assistant Professor of Physics at Aligarh Muslim University, Aligarh, India.   He has published more than 50 papers in reputed journals and has been serving as an editorial board member of repute.