A5056405732- Photonic Crystals and Applications
- Quantum Dots Synthesis And Properties
- TiO2 Photocatalysis and Solar Cells
- Nonlinear Optical Materials Studies
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Optical Coatings and Gratings
- Copper-based nanomaterials and applications
- Transition Metal Oxide Nanomaterials
- Semiconductor materials and devices
- Conducting polymers and applications
- Pigment Synthesis and Properties
- Covalent Organic Framework Applications
- Ga2O3 and related materials
- Photonic and Optical Devices
- Advancements in Battery Materials
- Catalytic Processes in Materials Science
- Thermal Radiation and Cooling Technologies
- Carbon Nanotubes in Composites
Budapest University of Technology and Economics
2019-2025
Inverse opals (IOs) are intensively researched in the field of photocatalysis, since their optical properties can be fine-tuned by initial nanosphere size and material. Another possible route for photonic crystal programming is to stack IOs with different pore sizes. Accordingly, single double were synthesized using vertical deposition atomic layer deposition. In case IOs, alternating use two preparation methods was successfully performed. Hydrothermally 326 458 nm carbon nanospheres...
Carbon nanospheres were used as templates for the first time to prepare titania inverse opal photonic crystal. From spheres, colloid crystals made by vertical deposition on microscope slides, and TiO2 was grown them using atomic layer (ALD). For this technique, relatively high thermal stability presence of oxygen containing functional groups surface carbon spheres are beneficial. Subsequent annealing burned out template leaving behind structures. The upper solid removed with argon ion...
In this work core/shell composite polymer/TiO2 nanofibers and from those TiO2 nanotubes were prepared. First, poly(vinyl alcohol) (PVA) poly(vinylpyrrolidone) (PVP) fibers synthetized by electrospinning. They covered with a 100 nm thick amorphous layer atomic deposition at 50 °C. Later the polymer core was removed two different methods: dissolution annealing. case of in water, as-prepared remained amorphous, while when annealing used to remove polymers, crystallized anatase form. Due this,...
In comparison to conventional nano-infiltration approaches, the atomic layer deposition (ALD) technology exhibits greater potential in fabrication of inverse opals (IOs) for photocatalysts. this study, TiO2 IO and ultra-thin films Al2O3 on were successfully deposited using thermal or plasma-assisted ALD vertical from a polystyrene (PS) opal template. SEM/EDX, XRD, Raman, TG/DTG/DTA-MS, PL spectroscopy, UV Vis spectroscopy used characterization nanocomposites. The results showed that highly...
Abstract In this paper, we combine the atomic layer deposition synthesis method of inverse opal with hydrothermal growth nanorods. From 460 nm polystyrene nanospheres crystals were produced using vertical on Si wafers. The templates covered ZnO by deposition. High temperature annealing was used to remove obtain structure. For nanorods, two production routes analysed: reaction before and after removal template. paths distinct structures, one plate like formations respectively. Also, sample...
Vertically aligned carbon nanotubes (VACNTs or "CNT forest") were decorated with semiconductor particles (TiO₂ and ZnO) by atomic layer deposition (ALD). Both the structure morphology of components systematically studied using scanning (SEM) high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, diffraction (XRD) methods. Characterization results revealed that decoration was successful in whole bulk VACNTs. The effect a...
We demonstrate the band gap programming of inverse opals by fabrication different wall thickness atomic layer deposition (ALD). The opal templates were synthesized using polystyrene and carbon nanospheres vertical method. structure properties TiO
Multicomponent materials containing nanoscale structures, the so-called "nanocomposites" are one of fastest-growing areas photocatalytic research. In this study, nanocomposites bismuth oxychloride (BiOCl) with porous carbon foam (CF) derived from waste polyurethane (PU) elastomers were developed by a simple hydrothermal method, and performance as-prepared was investigated. The structure, morphology optical properties composites characterized in detail. activity samples evaluated studying...