The Tera Electronvolt Superconducting Linear Accelerator TESLA is the only linear electron-positron collider project based on superconductor technology for particle acceleration. In the first stage with 500 GeV center-of-mass energy an accelerating field of 23.4 MV/m is needed in the superconducting niobium cavities which are operated at a temperature of 2 K and a quality factor Q0 of 10 . This...

The charge transport mechanism during metal-assisted chemical etching of Si nanowires with contiguous metal films has been investigated. The experiments give a better insight how the charges and reaction products can penetrate to the etching front. The formation of a layer of porous Si between the metal film and the bulk Si is a prerequisite for the etching process. The electronic holes (positi...

Ionic liquids (ILs) and deep eutectic solvents (DESs) have been applied in various fields such as electrolytes for lithium ion batteries, electrodeposition, electropolishing and even in fuel cells. ILs and molten salts have found some applications in redox flow batteries (RFBs) in the past and recently some metal ion based ILs have been proposed and used by Sandia National Laboratories. In addi...

The role that applied potential has in controlling the properties of porous silicon formed on highly conductive p-type silicon in diluted HF as been investigated by studying the photoluminescence characteristics along the current–voltage curve and using high resolution transmission lectron microscopy (HRTEM) evidence to support the conclusions drawn. A dramatic decrease in the average nanocryst...

Biodegradable stents can provide scaffolding and anti-restenosis benefits in the short term then gradually disappear over time to free vessel, among which Mg-based biodegradable metal have been prosperously developed. In present study, a Mg-8.5Li (wt.%) alloy (RE- Al-free) with high ductility (> 40%) was processed into mini-tubes, further fabricated finished stent through laser cutting electrop...

Solar energy presents the greatest potential by which to produce heat with reduced carbon emissions for power generation. To increase its harvesting and conversion, it is necessary understand fundamental concepts develop new materials. Although many processes can obtain selective absorbing surfaces (SAS) application in solar exploitation, including electroplating methods, those have not suffici...