A5064097845- Anodic Oxide Films and Nanostructures
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Analytical Chemistry and Sensors
- Transition Metal Oxide Nanomaterials
- Ferroelectric and Piezoelectric Materials
- Advanced Chemical Sensor Technologies
- Additive Manufacturing and 3D Printing Technologies
- Carbon Nanotubes in Composites
- Ferroelectric and Negative Capacitance Devices
- Advanced Memory and Neural Computing
- Advanced MEMS and NEMS Technologies
- TiO2 Photocatalysis and Solar Cells
- Microfluidic and Capillary Electrophoresis Applications
- Electronic and Structural Properties of Oxides
- Advanced ceramic materials synthesis
- Nanowire Synthesis and Applications
- Surface Modification and Superhydrophobicity
- Photonic and Optical Devices
- Neuroscience and Neural Engineering
- Polymer Surface Interaction Studies
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Diamond and Carbon-based Materials Research
- Optical Coatings and Gratings
Brno University of Technology
2015-2023
Central European Institute of Technology
2015-2023
The continuous emission of nitrous oxides contributes to the overall air pollution and deterioration quality. In particular, an effective NO2 sensor capable low concentration detection for monitoring is demanded safety, health, wellbeing. sensing performance a metal oxide-based predominantly influenced by availability surface area O2 adsorption desorption, efficient charge transport, size or thickness layer. this study, we utilized anodic one-dimensional (1D) TiO2 nanotube layers 5 μm thick...
The fabrication of superhydrophobic-oleophobic HfO2 coatings presents a challenge. Here, we synthesize via the self-organized anodizing aluminum-on-hafnium layers sputter-deposited onto SiO2 and glass substrate arrays highly aligned nanostructures dissimilar shapes, sizes, spacings, population densities termed as nanorods, nanopillars, nanohoodoos, nanopillars-in-domains, which were then modified with various self-assembled monolayers. treatment in fluoroalkyl-trimethoxysilane (FAS-17)...
Arrays of tungsten-oxide semiconductor nanorods, nanocapsules, and nanotubes are synthesized <italic>via</italic> anodic oxidation Al/W layers sputter-deposited on substrates.
The need for integrated passive devices (IPDs) emerges from the increasing consumer demand electronic product miniaturization. Metal-insulator-metal (MIM) capacitors are vital components of IPD systems. Developing new materials and technologies is essential advancing capacitor characteristics co-integrating with other passives. Here we present an innovative electrochemical technology joined sputter-deposition Al Zr layers to synthesize novel planar nanocomposite metal-oxide dielectrics...
Novel arrays of Nb2O5-based ceramic nanostructures various sizes (9–210 nm) and morphologies (dots, goblets, rods) aligned on substrates are fabricated via the anodizing a thin Nb film through initially formed porous anodic alumina (PAA) in 1.5 M selenic acid (H2SeO4) – new aqueous electrolyte generating extraordinarily thinner PAA pores than any other solutions. Accordingly, 1.3-fold better self-ordered their counterparts from same Al/Nb precursor bilayer reference oxalic-acid electrolyte....
A combination of frontier formation conditions, paradoxical oxide growth, unique ionic transport, a mixed-oxide composition, and phase transition effects resulted in arrays novel self-assembled zirconium-oxide nanostructures.
Abstract Here, zirconium‐oxide ceramic coatings comprising arrays of 3D nanostructures are electrochemically synthesized, ranging in shape, size, spacing, and population density, termed as the nanomounds (ø≈65 nm), nanopillars (ø≈130 nanostumps (ø≈220 nm). The nanostructured coatings, alongside a flat ZrO 2 anodic film, explored potential biomaterial experiments with Saos‐2 cells. All reveal no cytotoxicity to living density spreading area cells, being largest on slightly decrease increasing...
Abstract An aluminum‐on‐zirconium bilayer is anodized in oxalic acid solution to transform the Al layer into porous anodic alumina (PAA); this followed by PAA‐assisted re‐anodizing of Zr underlayer at voltages 40–280 V. The process results an array amorphous ZrO 2 nanocolumns, 45–330 nm long, partly filling PAA pores and anchored a continuous bottom oxide under pores, 20–130 thick, comprising 1.8 spongelike sublayer superimposed on 1.5 compact sublayer. thicknesses nanostructured oxides...
Here we synthesize a 3-D metal/oxide/metal nanostructured film that merges the benefits of advanced nanocomposite inorganic materials with flexibility nonlithographic electrochemical technologies based on so-called porous-anodic-alumina-assisted anodizing refractory metal and point electrodeposition noble metals. The is composed thin niobium oxide layer spatially-ordered upright-standing nanocolumns, assembled between two parallel electrodes, which work as long aspect ratio semiconducting...
The aerosol assisted chemical vapor deposition of Fe2O3 nanoparticle-functionalized tungsten oxide nanoneedles and their gas sensing properties are presented here. Material analysis demonstrates the incorporation 4 to 15 nm nanoparticles at surface nanoneedles. Gas tests show improved sensitivity, toluene, ethanol hydrogen, with highest sensitivity (six-fold) due its functionalization Fe2O3. This enhancement is nearly similar obtained when functionalizing platinum, suggesting that...
In this paper, we design and develop low-power MEMS based microhotplates for chemiresistive gas sensors using computer modelling microelectronic technologies, respectively. Two geometrical designs of supporting beams suspended membranes were designed simulated to evaluate displacement in the structure. different patterns heating elements designed, power consumption was calculated. Fabricated structures are studied compared with theoretical data obtained from simulations.
The making of 3-D nanostructured metal oxide films is an active and competitive area research, aiming at novel materials with enhanced properties sensing devices improved performances. Here we present the preparation procedure gas behavior a self-assembled WO3 nanofilm that effectively combines advantages inorganic simplicity universality offered by electrochemistry-based formation techniques. film formed mainly electrochemical anodizing composed array spatially-ordered upright-standing...
Thin dielectric films are actively investigated as materials for novel resistive random-access memories based on switching effect in metal/insulator/metal structures.Thin HfO2 of particular interest due to the high thermal stability, low operating voltages resulting devices, and complementary metal-oxidesemiconductor technology compatibility this material.In study, we investigate behavior nanostructured film embedded a porous anodic alumina matrix.The was synthesized via self-organized...