VŘ

V. Řeháček

Slovak University of Technology in Bratislava

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I. Hotový

Slovak University of Technology in Bratislava

Lothar Spieß

Technische Universität Ilmenau

Marián Vojs

Slovak University of Technology in Bratislava

Miroslav Mikolášek

Slovak University of Technology in Bratislava

IΝ

I. Νovotný

Czech Academy of Sciences, Institute of Molecular Genetics

M. Predanocy

Institute of Informatics of the Slovak Academy of Sciences

V. Tvarožek

Slovak University of Technology in Bratislava

Marián Marton

Slovak University of Technology in Bratislava

Ivan Hotový

Slovak University of Technology in Bratislava

I. Kostič

Institute of Informatics of the Slovak Academy of Sciences

Cooperative Institutions

Slovak University of Technology in Bratislava

Slovak Academy of Sciences

Technische Universität Ilmenau

Institute of Electrical Engineering of the Slovak Academy of Sciences

Comenius University Bratislava

Johannes Kepler University of Linz

Kirchhoff (Germany)

Institute of Chemistry of the Slovak Academy of Sciences

Institute of Informatics of the Slovak Academy of Sciences

International Laser Center

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Patterning of titanium oxide surfaces using inductively coupled plasma for gas sensing

Applied Surface Science (2014)

I. Hotový I. Kostič Š. Haščı́k V. Řeháček M. Predanocy

Dry etching

Plasma Etching

Titanium oxide

Silicon oxide

10.1016/j.apsusc.2014.03.174

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Citations (2)

Thin film voltammetric microsensor for heavy metal analysis

V. Tvarožek V. Řeháček K. Shtereva I. Νovotný V. Breternitz

Thin film palladium (Pd) and indium tin oxide (ITO) microelectrodes modify by mercury (Hg) were developed for heavy metal analysis by anodic stripping voltammetry. In case of Pb/sup 2+/ determination the sensitivity of ITO-Hg array of disc electrodes was higher (130 nA//spl mu/M) in comparison with Pd-Hg interdigitated array of electrodes (60 nA//spl mu/M).

Indium tin oxide

Mercury

Anodic Stripping Voltammetry

10.1109/icmel.2004.1314590

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Citations (4)

Bismuth modified boron doped diamond electrode for simultaneous determination of Zn, Cd and Pb ions by square wave anodic stripping voltammetry: Influence of boron concentration and surface morphology

Vacuum (2019)

Marián Marton Pavol Michniak Miroslav Behúl V. Řeháček Andrea Vojs Staňová

Anodic Stripping Voltammetry

Bismuth

Glassy carbon

Carbon fibers

10.1016/j.vacuum.2019.06.012

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Citations (40)

GaAs based micromachined thermal converter for gas sensors

Sensors and Actuators A Physical (2007)

T. Lalinský Milan Držík J. Jakovenko G. Vanko Ž. Mozolová

Thermal Stability

Bulk micromachining

10.1016/j.sna.2007.05.014

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Citations (6)

Capacitive detection in thin film chemical sensors and biosensors

V. Řeháček I. Νovotný V. Tvarožek Michael Riepl Thomas Hirsch

Thin film electrode chips on silicon substrate have been realized and utilized in development of different chemo- and biosensors. These affinity sensors are based on capacitive transducing and their general structure is thin film Au/alkanethiol/receptor. Several applications of thin film gold electrodes in capacitive sensors are presented.

10.1109/asdam.1998.730212

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Citations (1)

Ohmic Contacts to P–GaN Based on the Single–Walled Carbon Nanotubes

Journal of Electrical Engineering (2013)

Jozef Liday Peter Vogrinčič Viliam Vretenár Mário Kotlár Marián Marton

Abstract We have designed and verified a new structure for ohmic contacts to p-GaN, mainly for applications in light emitting devices based on a layer of single-walled carbon nanotubes (SWCNT) and metallic layers of Cr and Au, namely in configuration Au/Cr/SWCNT/p-GaN. The layer of carbon nanotubes was deposited on p-GaN by spraying a solution of synthesized SWCNTs, while the layers of Cr and Au were vapour deposited. The effects of the annealing temperature and time upon the electrical properties of Au/Cr/SWCNT/p-GaN contacts have been studied. It has been found that the contact structure provides a low resistivity ohmic contact after subsequent annealing in N2 ambient at 700 °C for 1 minute.

Ohmic contact

Contact resistance

Electrical contacts

10.2478/jee-2013-0047

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Citations (2)

Monitoring of the aggregation phase of erythrocyte sedimentation rate by impedance method on micrometric scale

1st Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology. Proceedings (Cat. No.00EX451) (2002)

V. Tvarožek G. Krausko R. Zahorec I. Νovotný V. Řeháček

The monitoring of the early stage of red blood cells sedimentation by an impedance method using a thin-film interdigitated array of microelectrodes (IDAE) is described. Time dependences of impedance |Z| exhibit maxima which are shifted to the shorter time period for cancer blood samples in comparison with inflammatory ones. Also the impedance rates (time derivate of impedance |Z|) were higher in cancer samples of blood. The sensitivity of this method was getting greater with both the decrease of the IDAE characteristic dimensions from 400 /spl square/m down to 5 /spl square/m and an increase of temperature from 18/spl deg/C up to 37/spl deg/C.

Erythrocyte sedimentation rate

Sedimentation

Maxima

10.1109/mmb.2000.893811

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Citations (1)

Optical, structural and hydrogen sensing properties of TiO2 thin films

I. Fasaki A. Rehakova I. Hotový V. Řeháček Michael Kompitsas

Source

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Citations (0)

AWG-spectrometer to analyze absorption spectra of optical gas sensors fabricated by femtosecond laser processing

AIP conference proceedings (2024)

Johann Zehetner Dana Seyringer Fadi Dohnal Stanislava Serečunová Heinz Seyringer

By a simple femtosecond laser process, we fabricate metal-oxide/gold composite films for electrical and optical gas sensors. We designed a dripple wavelength AWG-spectrometer, matched to the plasma absorption wavelength region of the composite films. H2/CO absorptions fit well with the AWG design for multi gas detection sensor arrays.

10.1063/5.0188211

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Citations (2)

Preparation and gas-sensing properties of very thin sputtered NiO films

Journal of Electrical Engineering (2021)

I. Hotový V. Řeháček Martin Kemény Peter Ondrejka I. Kostič

Abstract We present results on very thin NiO films which are able to detect 3 ppm of acetone, toluene and n-butyl acetate in synthetic air and to operate at 300°C. NiO films with 25 and 50 nm thicknesses were prepared by dc reactive magnetron sputtering on alumina substrates previously coated by Pt layers as heater and as interdigitated electrodes. Annealed NiO films are indexed to the (fcc) crystalline structure of NiO and their calculated grain sizes are in the range from 22 to 27 nm. Surface morphology of the examined samples was influenced by a rough and compact granular structure of alumina substrate. Nanoporous NiO film is formed by an agglomeration of small grains with different shapes while they are created on every alumina grain.

Non-blocking I/O

Nanoporous

10.2478/jee-2021-0009

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Citations (8)