A5013141595- Covalent Organic Framework Applications
- Advanced Photocatalysis Techniques
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Dielectric materials and actuators
- Innovative Energy Harvesting Technologies
- Electrocatalysts for Energy Conversion
- Acoustic Wave Resonator Technologies
- Ferroelectric and Piezoelectric Materials
- Advancements in Battery Materials
- Perovskite Materials and Applications
- Multiferroics and related materials
- Luminescence and Fluorescent Materials
- Tactile and Sensory Interactions
- Electronic and Structural Properties of Oxides
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Microwave Dielectric Ceramics Synthesis
- Electrospun Nanofibers in Biomedical Applications
- Energy Harvesting in Wireless Networks
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Caching and Content Delivery
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
Swiss Federal Laboratories for Materials Science and Technology
2022-2024
University of Cologne
2020-2023
Charles University
2017-2018
Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry
2017-2018
Water splitting using polymer photocatalysts is a key technology to truly sustainable hydrogen-based energy economy. Synthetic chemists have intuitively tried enhance photocatalytic activity by tuning the length of π-conjugated domains their semiconducting polymers, but increasing flexibility and hydrophobicity ever-larger organic building blocks leads adverse effects such as structural collapse inaccessible catalytic sites. To reach ideal optical band gap about 2.3 eV, A library eight...
Crystalline and amorphous organic materials are an emergent class of heterogeneous photocatalysts for the generation hydrogen from water, but a direct correlation between their structures resulting properties has not been achieved so far. To make meaningful comparison structurally different, yet chemically similar porous polymers, two polymorphs triazine-based graphdiyne (TzG) framework synthesized by simple, one-pot homocoupling polymerization reaction using as catalysts CuI TzGCu PdII /CuI...
Light-driven water splitting is a potential source of abundant, clean energy, yet efficient charge-separation and size position the bandgap in heterogeneous photocatalysts are challenging to predict design. Synthetic attempts tune polymer classically rely on variations sizes their π-conjugated domains. However, only donor-acceptor dyads hold key prevent undesired electron-hole recombination within catalyst via charge separation. Building our previous success incorporating electron-donating,...
Abstract Over the past four decades, energy microsources based on piezoelectric harvesting have been intensively studied for applications in autonomous sensor systems. The research is triggered by request replacing standard lead-based ceramics with environmentally friendly lead-free materials and potential deployment of energy-harvesting microsystems internet things, health, ‘place leave’ sensors infrastructures agriculture monitoring. Moreover, futher system miniaturization co-integration...
Donor-acceptor dyads hold the key to tuning of electrochemical properties and enhanced mobility charge carriers, yet their incorporation into a heterogeneous polymer network proves difficulty owing fundamentally different chemistry donor acceptor subunits. A family sulfur- nitrogen-containing porous polymers (SNPs) are obtained via Sonogashira-Hagihara cross-coupling combine electron-withdrawing triazine (C3 N3 ) electron-donating, sulfur-containing linkers. Choice building blocks synthetic...
Bismuth ferrite (BiFeO 3 , BFO) has found application in a wide range of fields owing to its fascinating multiferroic properties. Herein, the interplay between piezoelectric properties and morphology BFO nanostructures is exploited for vibrational energy harvesting by tailoring high aspect ratio surface area nanofiber morphology. This work demonstrates facile pathway fabrication high‐performance flexible nanogenerators, based on nanofibers, from cost‐effective energy‐efficient...
Abstract Water splitting using polymer photocatalysts is a key technology to truly sustainable hydrogen‐based energy economy. Synthetic chemists have intuitively tried enhance photocatalytic activity by tuning the length of π‐conjugated domains their semiconducting polymers, but increasing flexibility and hydrophobicity ever‐larger organic building blocks leads adverse effects such as structural collapse inaccessible catalytic sites. To reach ideal optical band gap about 2.3 eV, A library...
A novel simple synthetic pathway to a carbon-coated Li 2 S material from single molecular source for battery application using electrospinning methods is presented.
This study demonstrates the synthesis and characterisation of electrospun Ta3N5-(O) 1D-nanofibers for electrocatalytic hydrogen evolution reaction (HER) its performance in a proton exchange membrane (PEM) water electrolyser. 1D nanofibers were synthesized by electrospinning tantalum ethoxide/polyvinylpyrrolidone (PVP) sol followed ammonolysis at varied temperatures (800–1000 °C). Elemental distribution analysed through XPS, bulk-EDS studies revealed an increase surface oxygen concentration...
Abstract Electromechanical energy demands on homogenous thick films of piezoceramics with sufficiently large piezoelectric constant and reproducible performance. Single‐phase LiTaO 3 deposited by sol‐gel processing have been fabricated as cantilevers to investigate the interdependence dielectric properties a function film thickness. Phase pure varying thickness in range 2.07‐4.37 µm stainless steel substrates were obtained after calcination samples at 650°C. The relative permittivity...
The aim of this study was the electrospinning zirconia nanofibers without sol-gel precursors. Low-cost Zr-oxide and Zr-carbonate inorganic materials, with high molecular Zr-content compared to methods, were used for precursor formulation. Using a polyvinylpyrrolidone (PVP) polymeric binder, could successfully be synthesised both Zr-sources. effects different parameters investigated stabilize processing reduce deviation nanofiber diameters. Fibres calcined at 1000 °C produced from two...
This study presents a facile strategy to chemically modify the PZT through cold-sintering process. The presence of lead oxide phases in XRD patterns samples cold-sintered at 290 °C confirms dissolution Pb ions from surface particles. Post-annealing 900 resulted phase pure material with perovskite structure, wherein Ba had diffused into lattice PZT. post-annealed multi-faceted grain equilibrated triple points and relative density ~93%. electromechanical characterization showed that d33...
This study investigates the electrical properties of electrospun ceramic fiber mats based on potassium sodium niobate ((K,Na)NbO 3 ;KNN) for potential applications in soft‐robotic tactile sensors. The rheological studies electrospinning solutions exhibit shear thinning behavior, with a viscosity plateau between rates 1–100 s −1 . thermal decomposition behavior KNN samples is analyzed using thermogravimetric analysis; show multistep processes leading into phase pure perovskite structure. For...
Water splitting using polymer photocatalysts is a key technology to truly sustainable hydrogen-based energy economy. Synthetic chemists have intuitively tried enhance photocatalytic activity by tuning the length of π-conjugated domains their semiconducting polymers, but increasing flexibility and hydrophobicity ever-larger organic building blocks leads adverse effects such as structural collapse inaccessible catalytic sites. To reach ideal optical bandgap ~2.3 eV, we synthesised library...
Water splitting using polymer photocatalysts is a key technology to truly sustainable hydrogen-based energy economy. Synthetic chemists have intuitively tried enhance photocatalytic activity by tuning the length of π-conjugated domains their semiconducting polymers, but increasing flexibility and hydrophobicity ever-larger organic building blocks leads adverse effects such as structural collapse inaccessible catalytic sites. To reach ideal optical bandgap ~2.3 eV, we synthesised library...