Dr. Raja Ram Yadav | Award Winner - VIFRA 2015 | Lifetime Achivement
( Nomination Code : F. No. VIFRA 2015 / 3096 )
- Born on 4th January 1957 at Mahoba, Uttar Pradesh, India
- Ph.D in the faculty of Science from University of Allahabad, India, 1988
- Specialization : Ultrasonics
- 28 years of experience
- Presently working as a Professor of Physics at University of Allahabad, India
R. R. Yadav earned his B.Sc., M.Sc. and doctoral degree in Physics at University of Allahabad, India under UGC Fellowship. He is currently Professor of Physics at the Department of Physics, University of Allahabad. His research interests are in the non-destructive ultrasonic and thermal characterization of nanomaterials, lyotropic liquid crystalline materials, intermetallics and semiconductors; development of nanomaterials for biomedical applications. One of the important contributions of Prof. Dr. R.R. Yadav is the establishment of the theory for the calculations of temperature dependent non-linear elastic properties of the intermetallics, the alloys (ternary/quaternary), cubic and hexagonal structured nanotubes, nanowires, spherical nanoparticles based nanomaterials. Ultrasonic attenuation was modeled and implemented for different engineering materials such as nuclear fission products, nano-fluids, nano-composites and intermetallics emerging new physics applicable to nano-medicines and advanced technology. The work is interesting to extract the information about the microstructural features, fundamental processes- atom-atom, electron-phonon and phonon-phonon interaction and the characteristic thermophysical properties of the materials. Another noteworthy contribution of Dr. Yadav is the prediction of lyotropic liquid crystalline phase using the developed ultrasonic attenuation mechanism in the material system. This ultrasonic method is validated by the TEM studies. Dr. Yadav developed the ultrasonic mechanism for the first time to predict anomalous enhancement of the temperature dependent thermal conductivity of polymeric fluids like PVA, PVP etc. due to very small suspension of the nanoparticles. The enhancement has been confirmed by the temperature dependent thermal conductivity measurements. The study is very important for biomedical applications and coolant technology of microchannels. Using the ultrasonic method Dr. Yadav successfully synthesized the Nanofluiditic GMR materials first time and predicted the GMR properties by ultrasonic attenuation analysis. Dr. Yadav developed the ultrasonic spectroscopy method replacing the expensive TEM/ SEM to determine the size of nanoparticles and their distribution in liquids. This method does not require any sample preparation. Prof. Yadav successfully coupled the ultrasonics with the nanoscience and technology recognized as new area “Ultrasonics in Nanoparticles- Liquid Suspensions” in the field of acoustics. He was awarded the prestigious Indian National Science Academy (INSA) Teachers’ Award for the year 2012 and M.S. Narayanan Memorial Lecture Award in 2011. Dr. Yadav has been elected fellow of Acoustic Society of India, Ultrasonics Society of India, Institute of Applied Sciences, and Indian Academy of Social Sciences.