Endliche fossile Ressourcen und ehrgeizige Ziele zur Reduktion der Treibhausgase treiben die Elektrifizierung des Antriebsstrangs von Kraftfahrzeugen voran. Elektrische Traktionsmaschinen stehen dabei im Fokus zahlreicher Forschungsprojekte. Das Laserstrahlschweißen der aus Elektroblechen aufgebauten…
Ultradünnes Glas mit einer Dicke von 100 μm oder weniger ist ein hochqualitatives Glassubstrat, das entsprechend hochwertige Anwendungen erfordert. Derzeit beschränkt sich sein Einsatz auf faltbare Smartphone-Displays, Nischenprodukte wie Fingerabdrucksensoren und einige wenige andere Anwendungen. Allerdings…
Das Widerstandsschweißen ist eine weit verbreitete Technik zum Fügen von Kupferwerkstoffen in der Automobilindustrie, vor allem im Bereich von elektrischen Anwendungen. Der elektrische Kontaktwiderstand ist einer der bedeutendsten physikalischen Effekte des hochdynamischen Widerstandsschweißprozesses…
Die Integration von elektronischen Systemen in rauen Umgebungsbedingungen stellt bis heute eine Herausforderung dar. Ein stetig wachsender Markt für Hochtemperatur-Elektronik erfordert jedoch neue technische Lösungen, die z. B. bei weit über 200 °C zuverlässig und effizient betrieben werden können. Keramische…
Reaktive Multilagen, eine Untergruppe der energetischen Werkstoffe, haben aufgrund ihres Potenzials für Anwendungen in Bereichen wie Fügen, Zündsystemen und thermischen Batterien große Aufmerksamkeit erlangt. Diese Systeme bestehen aus gestapelten dünnen Schichten (Multilagen) mit stark exothermen Mischungsreaktionen,…
Zweidimensionale (2D) Nanomaterialien sind aufgrund ihrer faszinierenden mechanischen, elektronischen und thermischen Eigenschaften für umfangreiche Anwendungen in Phototransistoren, Biosensoren, Supercapacitors, Photovoltaik, Energiespeicherung und -umwandlung usw. zu einem der beliebtesten Forschungsschwerpunkte…
Solving the global challenge of freshwater scarcity is of great significance for over one billion people in the world. Solar water evaporation based on plasmonic nanostructures is one of the most promising technologies due to its high efficiency. However, the efficiency of this plasmonic nanostructure-based…
Magnetoelectric MEMS devices, such as magnetic field sensors, may be composed of a multilayer stack as a magnetostrictive layer, which is mechanically coupled to a piezoelectric film. Good adhesion and a stable rigid interface have to be maintained for such a sensor. Certain electric and magnetic properties,…
Liquid evaporation, or water vapor generation, is a spontaneous natural process and is always accompanied by evaporation cooling. However, evaporation cooling that can directly produce electricity based on the Seebeck effect and even supply power for electronic devices has not yet been reported. Here,…
Cambridge: Royal Society of Chemistry (RSC), 2024-09-16
Semiconducting materials show high potential for solar energy harvesting due to their suitable bandgaps, which allow the efficient utilization of light energy larger than their bandgaps. However, the photon energy smaller than their bandgap is almost unused, which significantly limits their efficient…
This study investigates the effects of sputtering and electron beam evaporation (e-beam) on the microstructure and reactive properties of Al/Ni reactive multilayers (RMLs). The intermixing zone, a critical factor influencing reaction kinetics, is characterized using high-resolution transmission electron…
2D metal phosphorous trichalcogenides (MPCh₃) have attracted considerable attention in sustainable energy storage and conversion due to their distinct physical and chemical characteristics, such as adjustable energy bandgap, significant specific surface area, and abundant active sites. However, research…
The chemical energy released as heat during the exothermic reaction of reactive multilayer systems has shown potential applications in various technological areas, e.g., in joining applications. However, controlling the heat release rate and the propagation velocity of the reaction is required to enhance…
Al/Ni reactive multilayer systems (RMS) with a bilayer thickness of Λ = 50 nm and total thickness th = 5 μm on a SiO2 substrate exhibit a self-propagating reaction after ignition. A common method to initiate the self-propagating reaction is by electric spark ignition. Herein, RMS are ignited by a mechanical…
Al/Ni reactive coatings are fabricated via electrochemical deposition (ECD) at different applied voltages for reactive bonding application. (Formula presented.) :1-ethyl-3-methylimidazolium chloride ([EMIm]Cl) (1.5:1) ionic liquid electrolyte is used as source of Al, whereas Ni is in the bath and incorporated…
Progressive developments in the field of lightweight construction and engineering demand continuous substitution of metals with suitable polymers. However, the combination of dissimilar materials results in a multitude of challenges based on different chemical and physical material properties. Reactive…
The influence of intentionally externally induced cracks in reactive Al/Ni multilayer systems is investigated. These cracks affect the reaction dynamics and enable tailoring of the reaction path and the overall velocity of the reaction front. The influence of layer variations onto mechanical crack formation…
Surface structuring methods are crucial in semiconductor manufacturing, as they enable the creation of intricate structures on the semiconductor surface, influencing the material’s electrical, mechanical, and chemical properties. This study employs one such structuring method known as reactive ion etching…
In order to address energy and environmental challenges effectively, there is a need to promote renewable energy-driven electrochemical conversion technologies, particularly electrosynthesis. Electrosynthesis has the potential to convert abundant molecules into valuable chemicals and fuels. However,…
Artificial leaves could be the breakthrough technology to overcome the limitations of storage and mobility through the synthesis of chemical fuels from sunlight, which will be an essential component of a sustainable future energy system. However, the realization of efficient solar-driven artificial leaf…