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Serhii Shafraniuk

Serhii Shafraniuk

Northwestern University, USA

Title: Advanced research and nanotechnological applications of Graphene

Biography

Serhii Shafraniuk has completed his Ph.D. at the age of 26 years from Kiev State University and postdoctoral studies from Kiev University Department of Physics. He is the research associate Professor at Northwestern University, a premier nanotechnology research organization. He has published more than 100 papers in reputed journals and serving as an Organizing Committee Member of several international conferences.

Abstract

The nanotechnology research nowadays are directed towards many areas which in particular include (i) nanosensors, (ii) digital logic elements, (iii) THz applications, (iv) quantum dots, (v) industrial and automotive applications. At Northwestern Univeristy, we conduct experimental and theoretical researches which are focused on the following topics. (a) Quantum dots as elements of the THz and magnetic field nanosensors. (b) Andreev reflection as a probe of interface properties. (c) Efficient carbon nanotube and graphene thermoelectric nanocoolers and energy generators. Our experimental devices involve multiterminal graphene and carbon nanotube field effect transistors (G-FET). The G-FET fabrication process aims to yield the CNT and graphene quantum dots. The G-FET devices had been fabricated as follows. The resonant character of chiral tunneling and the low inelastic scattering rates serve as reasons why the ac current density can be much higher than in ordinary semiconducting devices. By measuring the dc current-voltage curves of G-FET quantum dots which are exposed to an external THz field, we are able to determine the THz field parameters. In this way, we are utilizing the G-FET which actually works as a very sensitive and efficient THz field sensor. We find that the G-FET setup has a strong potential for designing of the THz sensor arrays, graphene made qubits, and THz lasers. Other potential applications of the G-FET include very efficient nanoscale thermoelectric coolers and the energy co-generators. We conclude that the graphene and carbon nanotube based setups can perform much better than other known devices.

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