The list of national projects SAS

2D materials and ionic liquids in microelectronics and sensors
2D materiály a iónové kvapaliny pre využitie v mikroelektronike a senzorike
Program:	VEGA
Project leader:	Mgr. Sojková Michaela PhD.
Annotation:	Two-dimensional (2D) materials and nanoparticles are a very hot topic. Project proposal builds on our knowledge gathered so far and it is focused on fabrication of 2D materials and nanoparticles (using ionic liquids ILs) and the combination of three materials. The aim of the project is the fabrication of experimental materials and devices for sensors. Concerning 2D materials, we will focus on the optimization of the growth parameters of thin films of selected materials. In field of nanoparticles, we will continue to prepare facetted metallic and carbon nanoparticles. Facetted ones will be used for the decoration of thin film 2D materials influencing thus the electrical transport within the film, which is applicable e. g. in gas sensors. Carbon nanoparticles are fluorescent which implies their suitability for the use in fluorescence microscopy. The ionic liquids will be used both for preparation of nanoparticles in vacuum and also for formation of EDL gate to control the electrical transport in 2D materials.
Duration:	1.1.2017 - 31.12.2020

2D materials beyond graphene: monolayers, heterostructures and hybrids
2D materiály iné ako grafén: monovrstvy, heteroštruktúry a hybridné vrstvy
Program:	SRDA
Project leader:	Dr. rer. nat. Hulman Martin
Annotation:	Two-dimensional (2D) materials have been one of the most extensively studied classes of materials due to their unusual physical properties. The best example is graphene – a single layer of carbon atoms arranged in a two dimensional (2D) honeycomb lattice. Many graphene´s extraordinary properties have been reported including excellent electronic and thermal conductivities and mechanical properties. Its discovery has also stimulated an extensive research on other 2D materials. It has been shown that it is not only possible to exfoliate stable, single-atom thick 2D materials, but that these materials can exhibit unique and fascinating physical properties. The 2D structure determines the electronic properties that may exhibit correlated electronic phenomena such as charge density waves and superconductivity. In this project, we focus on preparation of ultrathin (< 10 nm) films and monolayers of materials from the family of transition metal dichalcogenides (TMDs). The goal is to prepare those layers on a centimetre-large scale. For that, pulsed laser deposition and magnetron sputtering are the methods of our choice. As-prepared layers will then be thoroughly characterised in terms of their thickness, crystallinity, homogeneity, optical and electrical properties. As a next logical step, we will proceed in preparation of heterostructures and hybrids – systems where different TMDs materials and TMDs and graphene or graphene oxide are stacked on top of each other, respectively.
Duration:	1.7.2016 - 31.12.2019

Detection of ionizing particles using sensors base on semi-insulating GaAs and 4H-SiC for high energy physics
Detekcia ionizujúcich častíc s využitím senzorov na báze semiizolačného GaAs a 4H-SiC pre fyziku vysokých energií
Program:	VEGA
Project leader:	Mgr. Zaťko Bohumír PhD
Annotation:	The submitted project concern with research of semiconductor detectors based on semi-insulating GaAs and high quality 4H-SiC epitaxial layer as a detectos of ions and fast neutrons, which includes: - the technology study of preparation optimized detection structures of ionizing radiation; - simulation of detection performance of structures and their optimization in term of area and thickness of used metalization contacts as well as whole detection volume of structures; - study of physical and electrical properties of prepared structures, measurement of detection performances of detector structures using alpha particles, high energy ions (40 MeV Xe+), fast neutrons; - investigation of radiation hardness of prepare structures against high energy ions (Kr+, Xe+ 167 MeV) and electrons (5 MeV), study of electrical and detection parameters; - optimization and desing of connected spectrometry chain, which includes modifying and adaption of preamplifier with the aim of reaching best energy resolution.
Duration:	1.1.2016 - 31.12.2019

Silicon oxynitride-based photoluminiscent ceramic materials
Fotoluminescenčné keramické materiály na báze oxynitridov kremíka
Program:	SRDA
Project leader:	Ing. Fröhlich Karol DrSc.
Duration:	1.7.2015 - 30.6.2019

Photonic nanostructures prepared by 3D laser lithography for biosensing
Fotonické nanoštruktúry pripravené laserovou 3D litografiou pre biosenzory
Program:	SRDA
Project leader:	doc. Ing. Novák Jozef DrSc.
Duration:	1.7.2017 - 31.12.2020

Physical problems of MISFET and MISHFET structures based on III-V and III-N semiconductors
Fyzikálne problémy štruktúr MISFET a MISHFET na báze III-V a III-N polovodičov
Program:	VEGA
Project leader:	Ing. Osvald Jozef DrSc.
Annotation:	The project is oriented towards physical problems of III-V and III-N semiconductors. Many problems with these semiconductors are not solved yet or we have not their technological solution. Among these questions we may name in first the problems connected with the physics and chemistry of an interface between a semiconductor and a dielectric, solving of which is crucial for quality of this interface. The density of interface states of the prepared samples and structures depends directly on the solution of these problems and a possible presence of Fermi level pinning at the semiconductor surface, too. By III-V MISFET structures we want to study frequency dependence of capacitance curves. There are theories that in accumulation a dispersion of the capacitance is caused by a low density of states at the bottom of the conduction band and that the capacitance increase in inversion is connected with the states in the middle of the gap. We shall try to verify these theories or maybe modify them on the basis of the obtained results.
Duration:	1.1.2017 - 31.12.2020

GaN Monolithic Integrated Circuits
GaN monolitické integrované obvody
Program:	SRDA
Project leader:	Ing. Kuzmík Ján DrSc.
Duration:	1.7.2016 - 30.6.2019

Composite superconductor MgB2 made by internal Mg diffusion
Kompozitný supravodič MgB2 na báze difúznej metódy
Program:	VEGA
Project leader:	Ing. Kulich Miloslav PhD.
Annotation:	The goal of this project is to prepare superconducting wire (filament) using new method of diffusion of magnesium (IMD) into the boron layer. The usability of this method is regarded by resulting very high density of superconducting part in the composite. One of the purpose is to optimize the IMD technique in that way, that dense MgB2 wire reach very high critical current density Jc comparing to older techniques (ex situ, in situ). We can expect improvement of important technical parameters like critical current density in low magnetic fields (< 3 Tesla) and critical temperature to be competitive also for low temperature superconductors (Nb3Sn, NbTi, Nb3Al ...), having another advantage of more efficient cooling technique without the liquid helium.
Duration:	1.1.2016 - 31.12.2018

Magnetic interaction of superconducting and ferromagnetic layers: modelling, characterization and applications
Magnetická interakcia supravodivých a feromagnetických vrstiev: modelovanie, charakterizácia a aplikácie
Program:	VEGA
Project leader:	Mgr. Seiler Eugen PhD
Annotation:	The project aims to investigate the mutual magnetic interaction between superconducting and ferromagnetic layers. Theoretical investigation will rely on numerical models based on the Finite Element Method and the Minimum Electro-Magnetic Entropy Production method. The project will greatly improve the capabilities of the numerical methods, enabling accurate modelling of real geometries. Experimental investigation is based on characterization of the individual superconducting and ferromagnetic layers and on characterization of simple compound structures, with emphasis on conditions of AC field. Commercially available superconducting tapes will mainly be used as the superconducting elements and composites containing ferrite powder will mainly be used as ferromagnetic elements. Using the developed numerical models, the project will analyze and optimize motors with superconducting windings, as well as design and construct improved magnetic cloaks for shielding AC field.
Duration:	1.1.2018 - 31.12.2020

Magnetic cloaks from superconductor/ferromagnet composites
Magnetické plášte z kompozitov supravodič/feromagnetikum
Program:	SRDA
Project leader:	doc. Ing. Gömöry Fedor DrSc.
Annotation:	Realization of a magnetic cloak allowing to hide objects from being observed by a magnetic detector enables the experimental study of several fundamental problems of electromagnetism as well as the searching for innovative solutions of practical problems of magnetic field shielding and shaping. Main aim of the project is the development of methods for design and realization of magnetic cloaks that would provide the possibility to investigate these topics. Basic property we will pursue is the magnetic invisibility when a detector placed outside the cloak will not notice the cloak itself nor a “magnetic cargo” it would contain. Theoretical predictions for reaching perfect invisibility assume unrealistic properties of the used materials and work with ideal and simple shapes without any limitation of dimensions. That is why an important part of the project will be the search and testing of new numerical modelling methods able to include these substantial aspects of real objects. With help of these novel methods we plan to demonstrate the 99% perfection in magnetic invisibility at frequencies from DC to 1000 Hz. Our research could help to reach the following goals: a) Creation of space for experiments in biology shielding the Earth magnetic field as well as that produced in urban environment. Room temperature cylindrical space with at least 50 mm diameter and 150 mm height should allow easy sample exchange and manipulation. b) Design and manufacturing of the cloak for magnetic fields in the 0.1 T range with the volume exceeding 1000 cm3 for the purpose of protecting a sensitive electronic circuitry or e.g. formation of working space for DC arc welding in vicinity of electrical machines generating the stray field at this level. c) Investigation of force exerted on the cloak by a non-uniform magnetic field, in particular the possibility of a magnetic propulsion with help of controlling the magnetic moment of the superconductor/ferromagnet composite.
Duration:	1.7.2017 - 28.2.2021

Advanced nanostructures prepared by sophisticated MOVPE technology
Moderné nanoštruktúry pripravené sofistikovanou MOVPE technológiou
Program:	VEGA
Project leader:	doc. Ing. Novák Jozef DrSc.
Annotation:	This project is focused on the preparation of advanced nanowires and nanocones prepared by MOVPE technology. The main goal of the project is to study the growth and properties of GaP and GaN based nanowires prepared by vapour-liquid-solid (VLS) technique. In addition we will concentrate our efforts on improvements and enhancement of the most recent experience obtained within previous projects. Our research will be focused into three areas: (i) stemming from the expected application a most suitable material system will be applied (ii) the modification of the growth conditions (mainly diameter of seeds, growth temperature andV/III ratio) with the aim to modify mechanical dimension of the nanowires (i.e. transfer from nanowires to nanocones) (iii) acquire new knowledge on the deposition of the metallic nanograins on the top of the nanocones and nanowires with aim to optimize their properties for the SERS experiments.
Duration:	1.1.2017 - 31.12.2020

Modification of YBCO thin film structures using low energy electron beam processing for superconducting electronics
Modifikácia YBCO tenkovrstvových štruktúr nízkoenergetickými elektrónmi pre supravodivú elektroniku
Program:	SRDA
Project leader:	Ing. Chromik Štefan DrSc.
Annotation:	The proposed project deals with the effect of low energy electron irradiation of YBCO microstrips with the aim to fabricate channels for easy vortex motion. Detailed analyses will be focused on the subtle balance of many processes involving kinetic (kick-off) process, thermal activation of oxygen as well as ordering of Cu-O chains by incident electrons. The study of these phenomena together with the effect on introducing of artificial pinning in the illuminated channels, having influence on the dynamics of the vortices in the channel, lead to the contribution to basic reserach and also to the realization of functional model structure for the application in superconducting electronics.
Duration:	1.7.2017 - 31.12.2020

Design and preparation of high-temperature superconducting tapes joints using lead-free solders and characterization of their properties
Návrh a príprava spojov vysokoteplotných supravodivých pások bezolovnatými spájkami a charakterizácia ich vlastností
Program:	VEGA
Project leader:	doc. Ing. Gömöry Fedor DrSc.
Annotation:	This project of fundamental research is aimed to design and preparation of functional joints made of high-temperature superconducting tapes using lead-free solders based on tin or other low-melting elements. A conventional and induction soldering will be used for preparation of the joints and suitable parameters of joining process should be found by optimization methods. Development of microstructure, electrical and mechanical properties will be studied in prepared joints. Achieved results will be published in CC journals and presented on world-level scientific conferences.
Duration:	1.1.2017 - 31.12.2020

Surface processing of semiconductors as the way towards new III-As and III-N electronic devices
Opracovanie povrchu polovodiča ako cesta k novým III-As a III-N elektronickým súčiastkám
Program:	VEGA
Project leader:	RNDr. Gregušová Dagmar DrSc.
Annotation:	Surfaces of III-V semiconductors exhibit large densisties of surface states that limit the use of the semicondutors in electronics. Native oxides on III-V surfaces do not match the qualiy of oxides on the surface of silicon. The surface states have been studied and manipulated by many researchers with the aim to eliminate their infuence. Our aim is to find out how technology is used to eliminate or passivate the states. We intend to use heterostrucutres whose surface will be manipulated to allow for the preparation of high quality MOSHFETs. Manipulation with surface states leads to new types of device. It will thus be possible to integrate various types of transistor on a single wafer. To explore properties of individual layers of heterostructure by optical measurement will necessite their release from original substrates and transfer to host substrates. Procedures of heterostructure release and transfer will be used in the integration of other semiconductor devices on planar and non-planar substrates.
Duration:	1.1.2017 - 31.12.2020

Perovskite thin films and structures for modern electronics and sensorics
Perovskitovské tenké vrstvy a štruktúry vhodné pre modern elektroniku a senzoriku
Program:	VEGA
Project leader:	RNDr. Španková Marianna PhD
Annotation:	We prepare different types of perovskite films -ferromagnetic, superconducting, dielectric- (thickness up to 100 nm) and micro- and nano structures. YBa2Cu3Ox superconducting microstrips will be irradiated by electrons (30 keV) with the aim to create channels for easy vortex motion. We also focus on detailed study of Si/dielectric layer interface using unconventional materials (SrO, TiN) with the aim to enable epitaxial growth of buffer layers necessary for realization of uncooled microbolometers on the base of La0.67Sr0.33MnO3 films working and at frequencies in THz range. Beside the Bi4Ti3O12 studied so far different types of other buffer layers will be tested in order to develop new types of bolometers. We continue in study of perovskite superconductor S/ferromagnet F and S/F/S structures with the aim to resolve the phenomenom of S/F thin films interaction (proximity effect). The implementation of pi-type Josephson junction in digital and quantum circuits may solve some problems of superconducting qubits.
Duration:	1.1.2018 - 31.12.2021

Pinning in commercial coated conductors
Pinning v komerčných coated vodičoch
Program:	SASPRO
Project leader:	Mgr. Seiler Eugen PhD
Annotation:	The project will investigate pinning mechanisms in commercial ReBCO coated conductors coming from different industrial producers. Different manufacturing processes incorporate various kinds of pinning centers into functional superconducting layers of these conductors and as a consequence a very diverse mixture of pinning centers with dissimilar strength dependence on temperature and magnetic field can be found. Main focus will be on the temperature and magnetic field range interesting for applications in electric machinery (electric motors, generators, transformers, etc.) – temperatures 65 K to 77 K and fields 0 to 5 T. The aim is to identify which of the pinning mechanism is the most effective in the temperature and field domain of our interest and develop experimental techniques for its classification and description. Scaling of the critical current density and of the depinning activation energy with temperature and applied magnetic field will be experimentally characterized for all the commercial ReBCO coated conductors considered. At first the experiments in a broad range of available temperatures (4.2 K to 77 K) and applied magnetic fields (0 to 14 T) will be performed, focusing in the second stage on the domain perspective for the electric machinery applications. The experimental results will be compared with the predictions of available pinning models in order to determine and distinguish the different pinning mechanisms. Project combines experimental activity with application and development of theoretical models. Basic experimental techniques will be magnetization loop measurements and magnetic relaxation measurements in the Vibrating Sample Magnetometer, combined with transport measurements of current-voltage characteristics at various orientations of applied magnetic field.
Duration:	1.1.2016 - 31.12.2018

Advanced materials and smart structures for progressive applications in electrical engineering, electronics and other fields based on micro- and nano-sized ferrite particles
Pokročilé materiály a štruktúry pre perspektívne aplikácie v elektrotechnike, elektronike a iných oblastiach na báze feritov s rozmermi častíc v oblasti mikrometrov a nanometrov
Program:	SRDA
Project leader:	Mgr. Soloviov Mykola PhD.
Duration:	1.7.2016 - 30.6.2020

Semiconductor nanomembranes for hybrid devices
Polovodičové nanomembrány pre hybridné súčiastky
Program:	SRDA
Project leader:	Ing. Kúdela Róbert CSc.
Annotation:	The project deals with GaAs and GaN-based nanomembranes, including their preparation, study of physical properties, application in new hybrid devices that cannot be effectively prepared with present monolithic technologies. A "GaAs-based (or GaN-based) nanomembrane" can be defined as a monocrystalline structure that was released from its original substrate, is either free-standing or bonded to a host substrate, and its thickness is up to hundreds nanometers and lateral dimensions are more than two orders magnitude larger. Thin organic films, which can modify properties of nanomembranes, will be deposited on some samples.
Duration:	1.7.2016 - 31.12.2019

Cantilever based sensors
Senzory na báze nosníkových štruktúr
Program:	VEGA
Project leader:	Ing. Šoltýs Ján PhD
Annotation:	Cantilever-based sensors are used for the detection of physical, chemical, and biological analytes. In principle, every external perturbation of magnetic, electrical, thermal, or chemical origin can be transducted into mechanical motion. A cantilever deflection can be measured with extremely high sensitivity and selectivity. The project aims to develop new techniques for modification of commercial scanning force probes and to produce new cantilever-based sensors. The key enabling technology of the novel sensors is focus ion beam ablation and on-chip electron beam lithography. Application of such techniques in cantilever sensing opens new functionalities of the cantilever, which can be used for sensor applications and research purposes in physics and biomedicine.
Duration:	1.1.2015 - 31.12.2018

Skyrmions in ferromagnetic nanoobjects
Skyrmióny vo feromagnetických nanoobjektoch
Program:	SRDA
Project leader:	RNDr. Cambel Vladimír DrSc.
Annotation:	In this project we will focus on the numerical and experimental study of skyrmions in ferromagnetic nanoobjects. The skyrmions were found in structures with multilayer configuration and the confinement due to geometry can increase stability of the skyrmion significantly. Thus nanoobject structures can lead to room temperature stable, reconfigurable magnetic elements. Still a control and experimental investigation of such structures is chalenge. We will concentrate on the facilitation of generation and develop methods for identification and characterization of the skyrmion states. The study will pave the way towards the implementation of skyrmion in magnetic devices based on the patterned nano-objects (single or arrays).
Duration:	1.7.2017 - 31.12.2020

Waves in exotic spin textures
Spinové vlny v exotických štruktúrach
Program:	SASPRO
Project leader:	Dr. Mruczkiewicz Michal
Annotation:	The research project is focused on thetheoretical investigation of collective excitations in various magnetic architectures and magnetic field configurations (spin textures). In particular, the dynamical properties of magnetic vortices and skyrmions will be studied in disks, nontrivial geometries and ultrathin films. Possible mechanisms of excitations (e.g., current or external field) will be considered and the possibility of experimental verification of numerically studied structures will be evaluated. An important part of the work will be dedicated to the study of collective skyrmion modes, a topic of research that is completely unexplored yet. On the basis of the obtained results a logic device will be proposed.
Duration:	4.1.2016 - 31.12.2018

Investigation of design and manufacturing methods for coils from round high-temperature superconducting conductor
Štúdium metód návrhu a zhotovenia cievok z vodiča s kruhovým prierezom na báze vysokoteplotného supravodiča
Program:	SRDA
Project leader:	Ing. Šouc Ján CSc.
Duration:	1.7.2015 - 31.12.2018

Transistors with InN channel for THz microwaves and logic
Tranzistory s InN-kanálom pre THz mikrovlny a logiku
Program:	SRDA
Project leader:	Ing. Kuzmík Ján DrSc.
Duration:	1.7.2016 - 30.6.2019

Ultra light composite superconductor based on Mg, B, Ti and Al
Ultraľahký kompozitný supravodič na báze Mg, B, Ti a Al
Program:	SRDA
Project leader:	Ing. Kováč Pavol DrSc.
Duration:	1.7.2015 - 31.12.2018

Universal nanorod platform for interdisciplinary applications
Univerzálna nanoštrukturovaná platforma pre interdisciplinárne použitie
Program:	SRDA
Project leader:	doc. Ing. Novák Jozef DrSc.
Duration:	1.7.2015 - 31.12.2018

Investigation of advanced materials and structures for photoelectrochemical applications
Výskum progresívnych materiálov a štruktúr pre foto-elektrochemické aplikácie
Program:	VEGA
Project leader:	Ing. Huran Jozef CSc.
Duration:	1.1.2016 - 31.12.2019

Research of the nanomachining technology for active surfaces of the new generation of the X-ray optics
Výskum technológie nanoobrábania pre aktívne povrchy novej generácie rtg optiky
Program:	SRDA
Project leader:	Ing. Zápražný Zdenko PhD.
Duration:	1.7.2015 - 30.6.2019

High temperature characterization, integration and reliability of MEMS pressure sensors based on AlGaN/GaN
Vysokoteplotná charakterizácia, integrácia a spoľahlivosť MEMS senzorov tlaku na báze AlGaN/GaN
Program:	VEGA
Project leader:	Ing. Vanko Gabriel PhD.
Annotation:	The project deals with the design, technology and characterization of high temperature stable electronic components integrable with MEMS pressure sensors based on the AlGaN / GaN piezoelectric material system which can operate at extreme ambient conditions, especially at elevated temperatures. The project is based on the proven concept and manufactured functional prototype of pressure sensor, which has so far not been verified under real operating conditions. The proposed project is original in the high-temperature characterization, reliability testing and exploring the possibilities of integration of passive and active components prepared from AlGaN/GaN heterostructures . Expected results and knowledge of the characteristics and behavior of these promising materials and components enable to design devices and circuits as well as technological improvement for achieving competitive and qualitatively new sensor systems applicable in industry.
Duration:	1.1.2017 - 31.12.2019

The total number of projects: 28