A5102727275- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Transition Metal Oxide Nanomaterials
- Ga2O3 and related materials
- Analytical Chemistry and Sensors
- Advanced Photocatalysis Techniques
- Advanced Memory and Neural Computing
- Carbon Nanotubes in Composites
- MXene and MAX Phase Materials
- Acoustic Wave Resonator Technologies
- Semiconductor materials and interfaces
- Meat and Animal Product Quality
- Graphene research and applications
- Random lasers and scattering media
- Plant Reproductive Biology
- Copper-based nanomaterials and applications
- Advanced Battery Technologies Research
- Flame retardant materials and properties
- Horticultural and Viticultural Research
- Synthesis and properties of polymers
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
Fachhochschule Kiel
2017-2023
Kiel University
2017-2023
Landesanstalt für Landwirtschaft und Gartenbau
1967
Three-dimensional (3D) assemblies based on carbon nanomaterials still lag behind their individual one-dimensional building blocks in terms of mechanical and electrical properties. Here we demonstrate a simple strategy for the fabrication an open porous 3D self-organized double-hierarchical nanotube tube structure with properties advantageous to those existing so far. Even though no additional crosslinking exists between nanotubes, high reinforcement effect compression tensile characteristics...
Abstract Laser diodes are efficient light sources. However, state-of-the-art laser diode-based lighting systems rely on light-converting inorganic phosphor materials, which strongly limit the efficiency and lifetime, as well achievable output due to energy losses, saturation, thermal degradation, low irradiance levels. Here, we demonstrate a macroscopically expanded, three-dimensional diffuser composed of interconnected hollow hexagonal boron nitride microtubes with nanoscopic...
Fast detection of hydrogen gas leakage or its release in different environments, especially large electric vehicle batteries, is a major challenge for sensing applications. In this study, the morphological, structural, chemical, optical, and electronic characterizations ZnO:Eu nanowire arrays are reported discussed detail. particular, influence Eu concentrations during electrochemical deposition was investigated together with properties mechanism. Surprisingly, by using only 10 μM ions...
Monitoring volatile organic compounds (VOCs) in harsh environments, especially for safety applications, is a growing field that requires specialized sensor structures. In this work, we demonstrate the sensing properties toward most common VOCs of columnar Al2O3/ZnO heterolayer-based sensors. We have also developed an approach to tune selectivity by changing thickness exposed amorphous Al2O3 layer from 5 18 nm. Columnar ZnO films are prepared chemical solution method, where surface decorated...
Lithium-ion batteries are vital in one of the key nanotechnologies required for transition to a carbon-free society. As such, they under constant investigation improve their performance terms energy and power densities. At same time, safety monitoring is crucial, as defects battery cell can lead serious risks such fires explosions result enormous heat generated electrolyte, causing release toxic flammable gases so-called thermal runaway. Therefore, early rapid detection that form before...
In this study, a strategy to prepare CuO/Cu2O/Cu microwires that are fully covered by nanowire (NW) network using simple thermal-oxidation process is developed. The fixed on Au/Cr pads with Cu microparticles. After thermal annealing at 425 °C, these used as room-temperature 2-propanol sensors. These sensors show different dominating gas responses operating temperatures, e.g., higher sensitivity ethanol 175 room temperature and 225 hydrogen ∼300 °C. context, we propose the sensing mechanism...
Maximizing the energy and power density of supercapacitors requires thick electrodes, enabling a high areal loading. Simultaneously, sophisticated, hierarchical pore structure for active material is needed, granting accessibility electrons ions. However, porosity thickness need to be carefully balanced maximize while ensuring performance. Here, we show that by forming electrodes from Ti3C2Tx 2D nanosheets in form interconnected 3D networked thin films (up ∼220 nm), can fabricate performance...
A comparative investigation of the post-electroplating treatment influence on gas detecting performances single ZnO nanorod/nanowire (NR/NW), as grown by electrochemical deposition (ECD) and integrated into nanosensor devices, is presented. In this work, hydrothermal (HT) in a H2O steam conventional thermal annealing (CTA) furnace at 150 °C ambient were used post-growth treatments to improve material properties. Herein, morphological, optical, chemical, structural, vibrational, sensing...
Lithium-ion batteries (LIBs) still need continuous safety monitoring based on their intrinsic properties, as well due to the increase in sizes and device requirements. The main causes of fires explosions LIBs are heat leakage presence highly inflammable components. Therefore, it is necessary improve by preventing generation these gases and/or early detection with sensors. improvement such sensors requires new approaches manufacturing. There a growing role for research nanostructured sensor’s...
Abstract The material design of functional “aero”‐networks offers a facile approach to optical, catalytical, or and electrochemical applications based on multiscale morphologies, high large reactive area, prominent diversity. Here in this paper, the synthesis structural characterization hybrid β‐Ga 2 O 3 /ZnGa 4 nanocomposite aero‐network are presented. networks studied with respect their micro‐ nanostructure by X‐ray diffraction (XRD) transmission electron microscopy (TEM) characterized for...
Lithium-ion batteries are one of the most important energy storage devices future and pave way for a greener society. In this context, demand with high density is increasing significantly reaching limits technology currently in use. Therefore, intensive research being conducted to utilize new class materials storage. The promising alternatives today's nickel-based cathode graphite anode silicon sulfur. Both sulfur abundant cheap possess extremely theoretical specific capacities 4200 mAh/gSi...
Hierarchical, conductive, porous, three-dimensional (3D) carbon networks based on nanotubes are used as a scaffold material for the incorporation of sulfur in vapor phase to produce nanotube tube/sulfur (CNTT/S) composites application lithium ion batteries (LIBs) cathode material. The high conductivity nanotube-based material, combination with infiltration sulfur, allows improved utilization insulating active cathode. When is evenly distributed throughout network via infiltration, confines...
Network Materials In article number 2207492, Niklas Wolff, Ion Tiginyanu, Lorenz Kienle, and co-workers report on the synthesis structural characterization of a hybrid wide-band-gap semiconductor nanocomposite network interconnected hollow microtubes composed β-Ga2O3/ZnGa2O4 phases using X-ray powder diffraction transmission electron microscopy. The aero-network morphology shows ZnGa2O4-dominated narrow band green light emission under UV excitation high initial electrochemical capacity...
Permanent monitoring of lithium-ion batteries (LIBs) and volatile organic compounds (VOCs) in various environments, especially for safety biomedical applications, is a growing field due to the high reactivity materials used, which require specialized sensor structures. In this work, we summarize detection performance metal oxide heterostructures against battery solvents propose way tailor selectivity by modifying structural properties on nanoscale. Therefore, oxides are grown simple chemical...
In this study, double hierarchical and highly porous 3D carbon nanotube/sulfur (CNTT/S) composites were synthesized. By coating a ceramic template material with simple versatile infiltration process of an aqueous nanotube (CNT) dispersion self-organized CNT layer is formed. After removing the material, freestanding network created that show excellent electrical conductivity 6.02 S m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> high...
Lithium-sulfur batteries are one of the most promising Li-Ion batteries. Sulfur, with highest gravimetric capacity all cathode materials, allows a theoretical energy density that is five times higher than state art rechargeable Furthermore, sulfur cheap and earth abundant material, which makes it possible to be used in large-scale applications. Hereby, progress field mobile storage can achieved.[1] However, lithium-sulfur still suffer from intrinsic problems battery environment. The...
Crystalline silicon is an ideal anode candidate for lithium ion batteries as it offers a high Li + storage capacity, direct current pathway and stable earth abundant element. In order to match the theoretical energy density of in suitable cathode material required. Sulfur based cathodes have capacity application batteries, on conversion reaction cyclic S 8 molecule with form smaller polysulfides up 2 S, are also cheap abundant. One major drawbacks sulfur materials tendency be dissolved by...
Lithium ion batteries are one of the most promising secondary battery technologies with high gravimetrical and volumetric energy densities, enabling path towards a green environmentally friendly future. To further improve density battery, much effort is spent in development new electrode materials, like silicon sulfur, to replace materials limited specific capacity critical environmental impact that currently used. Silicon, higher than pure lithium (4200 mAh/g vs. 3862 [1]), anode being...
Crystalline silicon is an ideal anode candidate for lithium ion batteries as it offers a high Li + storage capacity, direct current pathway and stable earth abundant element. In order to match the theoretical energy density of in suitable cathode material required. Sulfur based cathodes have capacity application batteries, on conversion reaction cyclic S 8 molecule with form smaller polysulfides up 2 S, are also cheap abundant. One major drawbacks sulfur materials tendency be dissolved by...