Groundbreaking discovery in Physics by NU researchers

The discovery by Professor Zinetula Insepov (USA, and Head of the Anchor Project of the International Level at Nazarbayev University), Professor Kurbangali Tynyshtykbaev (Kazakhstan, staff member of the Anchor Project of the International Level at Nazarbayev University), Dr. Evgeniy Emelin, Dr. Oleg Kononenko and Professor Dmitry Roshchupkin (Russia, the Institute of Microelectronics Problems of the Russian Academy of Sciences) and Dr. Kanat Baigarin (Kazakhstan, Advisor to the President of Nazarbayev University) opens up new possibilities for using modern micro-graphene in micro and nanoelectronics. Today, graphene is the most durable, thin and ultralight electrically conductive material in the world. Recently, American scientists from the University of Arkansas found out that graphene is capable of revolutionizing the energy sector because it has the potential to become an almost infinite source of energy.

The results of a groundbreaking study demonstrated the ability of graphene to amplify high-frequency acoustic signals at negligible energy costs. The V.A. Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences and the Physics and Technology Institute of the Russian Academy of Science gave their expert conclusions confirming the value of the discovered effect.  The authors were also presented a certificate for their scientific discovery and the medal named after the Nobel Prize winner Peter Kapitsa from the Russian Academy of Natural Sciences, the International Academy of Authors of Scientific Discoveries and Inventions, and the International Association of Authors of Scientific Discoveries. 

«Practical developments arising from this discovery are of considerable value to international companies operating in the defense industry, medicine, national security, space communications, for example, to create a worldwide Internet. Intellectual rights to the results of the commercialization of this discovery do not yet belong to Nazarbayev University. We are negotiating with investors about the commercialization of the new device», – reported Professor Zinetulla Insepov.

During the experiment, Nazarbayev University scientists applied a film of graphene on the surface of a piezocrystal – a material capable of converting electrical energy into mechanical energy. At the same time, the graphene was exposed to a constant current source. During the laboratory experiment, a new phenomenon was experimentally observed, and a new theoretical model was developed: a threshold-less amplification of acoustic traveling waves generated by high-frequency electric current but amplified by direct current drown via graphene. At the same time, the energy of acoustic waves was incomparably more powerful than the original acoustic signal.

The study was first published in the well-known American scientific journal Applied Physics Letters in 2015 [1]. The article’s results were re-tested and published on two separate occasions in subsequent works [2,3]. After the discovery at Nazarbayev University, many scientists around the world have become interested in this new effect and its potential applications.

Picture retrieved from Medium.com

List of related publications:

[1] Z. Insepov, E. Emelin, O. Kononenko, D. V. Roshchupkin, K. B. Tnyshtykbayev, and K. A. Baigarin. Surface acoustic wave amplification by direct current-voltage supplied to graphene film, Appl. Phys. Lett. 106, 023505:1-5 (2015).

[2] D. Roshchupkin, L. Ortega, I. Zizak, O. Plotitcyna, V. Matveev, O. Kononenko, E. Emelin, A. Erko, K. Tynyshtykbayev, D. Irzhak, and Z. Insepov. Surface acoustic wave propagation in graphene film, Journ. Appl. Phys. 118, 104901 (2015).

[3] E. Emelin, H.D. Cho, Z. Insepov, J.C. Lee, T.W. Kang, G. Panin, D. Roshchupkin, K. Tynyshtykbayev. SEM imaging of acoustically stimulated charge transport in solidsAppl. Phys. Lett. 110, 264103 (2017).