A5065114074- Gold and Silver Nanoparticles Synthesis and Applications
- Laser Material Processing Techniques
- Advanced Sensor and Energy Harvesting Materials
- Laser-Ablation Synthesis of Nanoparticles
- Nonlinear Optical Materials Studies
- Spectroscopy and Laser Applications
- Plasmonic and Surface Plasmon Research
- Thin-Film Transistor Technologies
- Advanced Thermoelectric Materials and Devices
- Integrated Circuits and Semiconductor Failure Analysis
- Thermal Radiation and Cooling Technologies
- Laser-induced spectroscopy and plasma
- Semiconductor materials and devices
- ZnO doping and properties
- Combustion and flame dynamics
- Advanced X-ray Imaging Techniques
- Near-Field Optical Microscopy
- Fluid Dynamics and Thin Films
- Force Microscopy Techniques and Applications
- Copper Interconnects and Reliability
- Graphene research and applications
- Copper-based nanomaterials and applications
- Membrane Separation Technologies
- Laser Design and Applications
- Nanomaterials and Printing Technologies
Leibniz Institute of Photonic Technology
2016-2025
Albert Einstein College of Medicine
2024
Photonic Science (United Kingdom)
2013
Abstract In this contribution, inspired by the excellent resource management and material transport function of leaf veins, electrical metallized veins is mimicked from vein networks. By electroless copper plating on real networks with thickness only several hundred nanometre up to micrometre, certain can be converted transparent conductive electrodes an ultralow sheet resistance 100 times lower than that state-of-the-art indium tin oxide thin films, combined a broadband optical transmission...
Three-dimensional flexible solar fabrics based on hydrogenated amorphous silicon (a-Si:H) thin film cells were prepared and characterized. A glass fiber fabric with a polytetrafluoroethylene (PTFE) coating proved to be suitable textile substrate. Interwoven metal wires enable an integrated electrical interconnection. An array of consisting a-Si:H layer stack highly p-type/intrinsic/highly n-type doping profile was deposited onto it. Silver used as the back contact indium tin oxide (ITO)...
Scientific and technological progress depend substantially on the ability to image nanoscale. In order investigate complex, functional, nanoscopic structures like, e.g., semiconductor devices, multilayer optics, or stacks of 2D materials, imaging techniques not only have provide images but should also quantitative information. We report material-specific characterization buried with extreme ultraviolet coherence tomography. The method is demonstrated at a laser-driven broadband radiation...
Abstract It is demonstrated that spacer fabrics made of polyester can be coated with Al-doped ZnO (AZO) as thermoelectric (TE) material and conductive silver contact to enable smart textiles. An atomic layer deposition process was used for the AZO coating paste manually applied. A TE generator cooling based on Seebeck Peltier effect observed if a temperature difference or direct current applied, respectively. Both effects were proven exist evaluated. The coefficient determined up 50 µ V · K...
The integration of electronic functionalities into textiles for use as wearable sensors, energy harvesters, or coolers has become increasingly important in recent years. A special focus is on efficient thermoelectric materials. Copper iodide a p-type thermoelectrically active, nontoxic material attractive harvesting and generation because its transparency possible high-power factor. deposition CuI polyester spacer fabrics by wet chemical processes represents great potential textile industry...
Non-destructive cross-sectional characterization of materials systems with a resolution in the nanometer range and ability to allow for time-resolved in-situ studies is great importance material science. Here, we present such measurements method, extreme ultraviolet coherence tomography (XCT). The method non-destructive during sample preparation as well measurement, which distinguished by negligible thermal load compared electron microscopy methods. Laser-generated radiation (XUV) soft x-ray...
We investigate a cavity ring down setup that offers the possibility to measure spectrally resolved reflectivities of high reflectivity mirrors. The consists resonator (ring cavity) and an intensified CCD camera system combined with spectrograph for spectral resolution. A commercial supercontinuum laser (350-1750 nm) is applied as compact excitation source. It based on photonic crystal fiber pumped by q-switched microchip (1.6 ns pulse duration, 25 kHz repetition rate). This combination...
We report on a novel fabrication scheme obtaining metal nanoparticles grown in crystal high index ambient, i.e. SrTiO3 (STO). Starting from deposited Au layer ellipsoidal and orientated nanoantennas can be prepared controlled via laser ablation. discuss the deposition conditions demonstrate geometrical properties of embedded by Transmission Electron Micrography (TEM) X-ray Diffraction (XRD) investigations. The plasmonic activity resulting highly crystalline particles could observed...
We present a tabletop setup for extreme ultraviolet (EUV) reflection spectroscopy in the spectral range from 40 to 100 eV by using high-harmonic radiation. The simultaneous measurements of reference and sample spectra with high energy resolution provide precise robust absolute reflectivity measurements, even when operating spectrally fluctuating EUV sources. stability sensitivity are crucial factors many applications attosecond science, spectroscopy, nano-scale tomography. show that accuracy...
Nanoparticles consisting of a mixture several metals and also porous nanoparticles due to their special structure exhibit properties that find application in spectroscopic detection or catalysis.
We report on the fabrication of spherical Au spheres by pulsed laser treatment using a KrF excimer (248 nm, 25 ns) under ambient conditions as fast and high throughput technique. The presented experiments were realized initial layers 100 nm thickness deposited optically transparent low cost Borofloat glass or single-crystalline SrTiO3 substrates, respectively. High (111)-orientation smoothness (RMS ≈ 1 nm) are properties before treatment. After treatment, with size distribution ranging from...
Abstract Smart textiles that promise to become sensors and actuators for multiple applications are an active area of research. Conductive formed by coating a fabric with conductive film will play key role in such applications. Here we present contactless mapping the terahertz (THz) conductivity thin films deposited on textiles. These maps enable non-destructive assessment layers therefore identification localization non-uniformities local conductivity. The THz measurements quantitatively...
The marker-free and noninvasive detection of small traces analytes in aqueous solution using integrated optical resonators is an emerging technique within bioanalytics. Here, we present a single-mode silicon-nitride stadium resonator operating at the red edge visible spectrum, showing sensitivities larger than 200 nm/RIU transmission dips with extinction ratios more 15 dB. We introduce mathematical model that allows analyzing sensitivity properties guided mode only. Large geometric parameter...
Laser safety is starting to play an increasingly important role, especially when the laser used as a tool. Passive systems quickly reach their limits and, in some cases, provide inadequate protection. To counteract this, various active have been developed. Flexible and textile-protective materials pose special challenge. The market still lacks personal protective equipment (PPE) for safety. Covering these with solar cells large-area optical detectors offers promising possibility. In this...