A5005349692- Gas Sensing Nanomaterials and Sensors
- Plasma Diagnostics and Applications
- Plasma Applications and Diagnostics
- ZnO doping and properties
- Acoustic Wave Resonator Technologies
- Aerogels and thermal insulation
- Surface Modification and Superhydrophobicity
- Covalent Organic Framework Applications
- Conducting polymers and applications
- Solar-Powered Water Purification Methods
- Dust and Plasma Wave Phenomena
- Advanced Memory and Neural Computing
- Metal-Organic Frameworks: Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Diamond and Carbon-based Materials Research
- Surface and Thin Film Phenomena
- Topological Materials and Phenomena
- Advanced Sensor and Energy Harvesting Materials
- Transition Metal Oxide Nanomaterials
- 2D Materials and Applications
- Graphene research and applications
- Atmospheric aerosols and clouds
- Luminescence Properties of Advanced Materials
- Carbon and Quantum Dots Applications
- MXene and MAX Phase Materials
Fachhochschule Kiel
2021-2024
Kiel University
2019-2024
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...
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...
Conversion of light into heat is essential for a broad range technologies such as solar thermal heating, catalysis and desalination. Three-dimensional (3D) carbon nanomaterial-based aerogels have been shown to hold great promise photothermal transducer materials. However, until now, their light-to-heat conversion limited by near-surface absorption, resulting in strong localization only at the illuminated surface region, while most aerogel volume remains unused. We present fabrication concept...
An in-situ method to measure the radii of single microparticles in plasmas with high precision is presented. The particles are trapped plasma sheath and illuminated laser light. Using out-of-focus imaging polarizing optics, angle- polarization-resolved scattering intensities measured compared Lorenz-Mie theory. A two-stage fit procedure introduced obtain complex refractive index addition particle radius. Complementary long-distance microscopy measurements performed compare results. applied...
Zinc oxide has widespread use in diverse applications due to its distinct properties. Many of these benefit from controlling the morphology on nanoscale, where for example gas sensing is strongly enhanced high surface-to-volume ratios. In this work formation novel ZnO nanobrushes by plasma etching treatment as a new approach presented. The and structure are studied detail transmission scanning electron microscopy. It revealed that nanobrush structures fabricated self-patterned preferential...
Abstract Soft and flexible conductors are essential for the development of soft robots, wearable electronics, electronic tissue, implants. However, conventional inherently characterized by a large change in conductance upon mechanical deformation or under alternating environmental conditions, e.g., humidity, drastically limiting their application potential. This work demonstrates novel concept strain‐invariant, highly elastic water stable all‐organic conductors, overcoming limitations...
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 HelixJet, a plasma source operating under atmospheric pressure with RF power, was used for the synthesis of silicon nanoparticles (Si‐NPs) in context relevance nanomedicine, sensor technology, and nanotechnology. HelixJet operated variety He/Ar/H 2 /SiH 4 gas mixtures to characterize Si‐NPs regard their size, crystallinity, structure, photoluminescence. Distinct varieties nanomaterials size range from 3 nm over 100 were synthesized depending on operation parameters HelixJet....
Abstract A parallel‐plate, low‐pressure plasma for fundamental nanodusty research is used to grow hydrogenated amorphous carbon nanoparticles using an argon‐acetylene gas mixture. The particles stay confined in the volume of argon after turning off flow and effects prolonged treatment with noble (Ar) reactive mixtures (Ar/, Ar/, or Ar/) are investigated situ infrared absorption spectroscopy. Additionally, ex scanning electron microscopy imaging extracted analyze their size surface...
Abstract A simple setup utilizing parallel flat electrodes with a 50–150 μ m interelectrode distance divided by Kapton spacer 1 mm diameter whole as discharge region intended for in situ transmission electron microscope studies is presented. The rather small operated Ar or He results an atmospheric pressure DC normal glow and investigated using various diagnostics. I – V characteristics show glow-like behavior of the microplasma. Significant differences due to working gas, electrode material...
Abstract Topological insulators (TIs) exhibit unconventional quantum phases that can be tuned by external confinements. The geometry of the surface 3D TIs plays a crucial role. For example, geometrical crossover from 2D surfaces to 1D cylinder results in novel state with Spin‐Berry Phase (SBP). Surface‐Enhanced Raman Scattering (SERS) sub‐micron spatial resolution is utilized study quantum‐confinement effects quasi‐relativistic electrons along perimeter circular bismuth selenide (Bi 2 Se 3 )...
Conversion of light into heat is essential for a broad range technologies such as solar thermal heating, catalysis and desalination. Three-dimensional (3D) carbon nanomaterial-based aerogels have shown to hold great promise photothermal transducer materials. However, till now, their light-to-heat conversion limited by surface-near absorption, resulting in strong localization only at the illuminated surface region, while most aerogel volume remains unused. We present an innovative fabrication...
Soft Electronics Conventional soft conductors are characterized by a large change in conductance upon mechanical deformation. In article number 2212688, Fabian Schütt, Stefan Schröder, and co-workers, combine thin film deposition technologies three-dimensional fashion, resulting multi-layered ultra-lightweight foam-like framework structures based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), coated with polytetrafluoroethylene. These all-organic show strain-invariant over...
The new generation of laser-based solid-state lighting (SSL) white light sources requires material systems capable withstanding, diffusing and converting high intensity laser light. State-of-the-art use a blue emitting diode (LED) or (LD) in combination with color conversion materials, such as yellow Ce-doped phosphors red green quantum dots (QD), to produce However, for high-brightness illumination particular, thermal management is major challenge, addition, diffuser required diffuse the...
Soft and flexible conductors are essential in the development of soft robots, wearable electronics, as well electronic tissue implants. However, conventional inherently characterized by a large change conductance upon mechanical deformation or under alternating environmental conditions, e.g., humidity, drastically limiting their application potential performance. Here, we demonstrate novel concept for strain-invariant, fatigue resistant highly water stable conductor. By combining different...