Tomáš Plecenik, doc. RNDr., PhD.

Academic, Scientific Research Department

Head of the Centre

Contact

Bratislava
02/602 95 867
Tomáš Plecenik
Tomas-Plecenik
N-5776-2019
12785734200
0000-0002-6518-052X
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Bio

Head of the Centre. Previously researcher and since 2015 associate professor at the Department of Experimental Physics FMPI CU. His research areas include metal oxide semiconductor gas sensors, resistive switching phenomena, superconductivity and nanotechnology. He is experienced in electrical transport, gas sensing and low temperature measurements, scanning probe microscopy, and other thin film related techniques and methods. In teaching he focuses on measurement and diagnostic methods in solid state physics.

Specialization research areas

MOS gas sensors Chemiresistive gas sensors Hydrogen Resistive switching Memristors Superconductivity Scanning probe microscopy Scanning probe microscopy

Education

2015

Habilitation thesis: Utilization of scanning probe methods in the study and modification of solid surfaces

Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava, Slovakia
2009

PhD thesis: Nanostructures and their practical applications 

Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava, Slovakia
2007

Rigorous thesis: SQUID structures based on low-temperature and mid-temperature superconductors

Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava, Slovakia
2005

Diploma thesis: Preparation and properties of weakly coupled superconducting structures

Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava, Slovakia

Internships

09/2006 – 12/2006

Internship

Laboratory for Laser Energetics, University of Rochester, Rochester NY, USA
08/2004 – 09/2004

Internship

Institute for Physical High Technology (IPHT), Jena, Germany

Reviewer activities

Reviewer

Sensors and Actuators B: Chemical, International Journal of Hydrogen Energy, Applied Surface Science

Elsevier, The Netherlands

Other activities

Member

Academic Senate of the Faculty of Mathematics, Physics and Informatics

Comenius University Bratislava
Chair

Committee for Economy and Development of the Academic Senate FMPI

Comenius University Bratislava
Member

Scientific Council at the Institute of Electrical Engineering

Slovak Academy of Sciences

Awards

2015

Young Scientist of the Year Award

Ministry of Education, Science, Research and Sport of the Slovak Republic

Projects

National

Sensors
Principal Investigator

Demonstration of physically unclonable memristive information encoding and decoding

Oxford Brookes University
Sensors
Principal Investigator

APVV-21-0053: Semiconductor gas sensors with intrinsic memory based on resistive switching

Slovak Research and Development Agency (APVV)
Sensors
Researcher

APVV-21-0039: Photochemically Versatile Materials for Water Treatment

Slovak Research and Development Agency (APVV)
Sensors
Principal Investigator

VEGA 1/0062/22: New generation of chemiresistive gas sensors with capacitor-like electrode arrangement and built-in memory

VEGA

Teaching activities

Courses taught

Course Objectives

By completing the course, students will gain an overview of selected electrical, magnetic and optical measurement methods used for characterization of properties of solids.

Syllabus

Conductivity and contact phenomena. DC methods of measuring resistance and conductivity – probe methods, Van der Pauw method. Arrhenius plot – determination of activation energies. Measurement of very small currents and voltages. Hall effect. AC measurements – phase sensitive signal detection, Lock-in, measurement of differential (dI(V)/dV) characteristics, tunneling spectroscopy, impedance spectroscopy. AC susceptibility measurements. Kelvin probe measurements. Noises – intrinsic and extrinsic noises, capacitive and inductive coupling, shielding, grounding, noises in amplifiers. Measurement of lifetime, mobility and diffusion length of minority charge carriers by optical methods. Femtosecond spectroscopy – pump-probe measurement. Temperature measurement methods.

Course Objectives

Students acquire essential knowledge of principles and properties of basic digital circuits. Gain practical experience to design and construct digital electronic devices and programing selected microprocessors and simple robotic systems.

Syllabus
Principles of DDL, DTL and TTL circuits,
Boolean functions – combinational logic networks and their optimization,
– some combination circuits (adder, multiplexer and demultiplexer)
Physical implementation of automata (sequential circuits and their applications)
– RS and D flip-flops,
(counter, shift register, three-state output, memory management (R/W))
– parallel to serial code converter and RS232 interface,
– static and dynamic RAM memories and their organization
Microprocessors.
Microprocessor structure
Arithmetic Logic Unit (ALU) Structure
Implementation of instructions and their distribution
Addressing methods,… internal and external memory
Additional devices – their connection and data transfer (data transfer, bus)
Realization of binding circuits (interface) for memories and peripheral devices
Characteristics affecting the performance of computers (clock frequency, access time, transfer capacity, size of registers…)
Programming of single-chip microcomputers in a high- and low-level programming language and the basics of robotics, types of signals, their processing and control.
Course Objectives

After completing the course the student will gain basic theoretical knowledge on the electrical and optical properties of semiconductors and semiconductor devices.

Syllabus
Band structure of semiconductors, statistics of electrons and holes in the intrinsic and doped semiconductors, carrier scattering by impurities and lattice vibrations – carrier mobility. Conductivity of semiconductors in strong electric fields – solution of the Boltzmann transport equation by Monte Carlo simulation. Excess carriers, optical absorption, photoluminescence, carrier life time. Diffusion, drift, and recombination of excess carriers, Haynes-Shockley experiment. Equilibrium state and current-voltage characteristic of the p-n junction and Schottky junction, rectifying and ohmic Schottky junction, modulation-doped semiconductor heterojunction – two- dimensional electrons with high mobility, resonant tunneling diode. Bipolar transistor, field effect transistor, high-electron-mobility transistor. Optoelectronics devices – photodiode, solar cell, photodetector, LED, semiconductor laser.
Course Objectives

By completing the course, students will gain an overview of selected analytical, spectroscopic and microscopic methods used for studies of solids in terms their structure, composition, surface topography and other properties.

Syllabus
Electron and ion optics, types of analyzers for analytical and spectroscopic methods.
Principles and description of methods:
– X-Ray photoelectron spectroscopy, Auger electron spectroscopy, UPS, IS
– X-ray and electron diffraction, small angle scattering and related methods
– Scanning and transmission electron microscopy and related methods (EDX, WDS, FIB)
– Scanning probe microscopy (STM, AFM, EFM, MFM, SSRM, KPFM)
and others.

Students supervision

Supervisor of bachelors, master, and PhD. students.

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