Polymethylmethacrylate (PMMA) is one of the most important thermoplastic materials and a widely used material in microfluidics. However, PMMA usually structured using industrial scale replication processes, such as hot embossing or injection molding, not compatible with rapid prototyping. In this work, we demonstrate that microfluidic chips made from can be 3D printed fused deposition modeling (FDM). We FDM minimum channel cross-section ~300 µm variety different geometries mixer structures...

Shaping silica like a polymer Glass is tremendously useful, but it energy intensive to make because of the high melting temperature and processing methods that require melts. Mader et al. circumvented need for glass using plastic nanocomposite injection molding (see Perspective by Dylla-Spears). The low-temperature can produce parts in as little 5 seconds with spatial resolution. strategy provides different potentially less energy-intensive method mass producing made glass. Science , this...

In recent years, additive manufacturing (AM) of glass has attracted great interest in academia and industry, yet it is still mostly limited to liquid nanocomposite-based approaches for stereolithography, two-photon polymerization, or direct ink writing. Melt-extrusion-based processes, such as fused deposition modeling (FDM), which will allow facile large thin-walled components simple multimaterial printing are so far inaccessible AM transparent silica glass. Here, melt-extrusion-based...

Tool based manufacturing processes like injection moulding allow fast and high-quality mass-market production, but for optical polymer components the production of necessary tools is time-consuming expensive. In this paper a process to fabricate metal-inserts tool with smooth surfaces via casting replication from fused silica templates presented. Bronze, brass cobalt-chromium could be successfully replicated shaped replications achieving surface roughnesses Rq 8 nm microstructures in range 5...

Polystyrene (PS) is one of the most commonly used thermoplastic materials worldwide and plays a ubiquitous role in today's biomedical life science industry research. The main advantage PS lies its facile processability, excellent optical mechanical properties, as well biocompatibility. However, only rarely microfluidic prototyping, since structuring mainly performed using industrial-scale replication processes. So far, chips have not been accessible to rapid prototyping via 3D printing. In...

Platinum (Pt) is an interesting material for many applications due to its high chemical resilience, outstanding catalytic activity, electrical conductivity, and melting point. However, microstructuring especially 3D of platinum a complex process, based on expensive specialized equipment often suffering from very slow processing speeds. In this work, organic-inorganic photoresins, which can be structured using direct optical lithography as well two-photon (TPL) with submicrometer resolution...

A mathematical model of a parallel plate electrochemical cell with separator and homogeneous bulk reaction is presented. The based on the redox couple can be used as an aid for design efficient rechargeable storage battery. It shown that four independent variables exist system at fixed temperature: effective thickness, residence time, channel width, potential driving force. Performance criteria interest battery are defined. Predictions performance during charging process improves thickness...

Abstract High molecular weight polyhydroxymethylene (PHM) has a repeat unit identical to that of low sugar alcohols and exhibits carbohydrate‐like properties. Herein, cryogenic extrusion‐based 3D printing is combined with phase separation in water fabricate hierarchically porous PHM scaffolds containing interconnected macro‐, micro‐, nanopores. As infusible insoluble common solvents, its precursor polyvinylene carbonate (PVCA) dissolved dimethylsulfoxide (DMSO) used print PVCA are converted...

Abstract Liquid repellent surfaces are of high interest in various fields like protective coatings and droplet manipulation due to their outstanding properties from self‐cleaning anti‐fouling. Most reported rely on the fabrication micro/‐nanostructured surfaces, infusion porous with immiscible lubricants, or grafting monolayers low surface energy achieve repellence liquids. However, these methods limited terms durability long‐term stability. Here, smooth, transparent fluorinated poly...

Abstract Common sugar alcohols used as artificial sweeteners and components of polymer networks represent low molecular weight polyhydroxymethylenes (PHMs) with the general formula [CH(OH)] n H 2 but very degree polymerization ( = 2–6). Herein high PHM >> 100) unparalleled in nature is tailored for 3D printing medical applications by free radical 1,3‐dioxol‐2‐one vinylene carbonate to produce polyvinylene (PVCA) which yields hydrolysis. Furthermore, PVCA solution processable enables...

Transparent ceramics like magnesium aluminate spinel (MAS) are considered the next step in material evolution showing unmatched mechanical, chemical and physical resistance combined with high optical transparency. Unfortunately, transparent notoriously difficult to shape, especially on microscale. Therefore, a thermoplastic MAS nanocomposite is developed that can be shaped by polymer injection molding at speed precision. The converted dense debinding, pre-sintering, hot isostatic pressing...

A material balance closure calculation is presented to test the consistency of a previously published model parallel plate electrochemical reactor. New expressions are used in this procedure calculate average concentration species and current density for reaction from predicted potential distributions. Also, equations simplified by assuming that axial gradient can be approximated step change known feed unknown outlet concentration. This one‐step provides qualitative evaluation cell...

Transparent ceramics such as magnesium aluminate spinel (MAS) are an outstanding class of materials that combine high optical transparency with remarkable mechanical, chemical and thermal strength. They particularly interesting for micro-optical applications, since MAS offers a refractive index in combination low dispersion, which is inaccessible other including glasses polymers. However transparent polycrystalline notoriously difficult to microstructure. Methods hot pressing or slip casting...

Microstructured fused silica glass is of high demand for many applications in microsystems engineering, microfluidics and microoptics. However, structuring extremely difficult needing either very temperatures melt processing, hazardous chemicals wet etching or time-consuming mechanical post-processing steps. The lack feasible high-throughput manufacturing techniques prevent the usage so far. Recently, soft replication 3D printing were introduced using nanocomposites that are converted into a...

Microstructured platinum (Pt) is of great importance in a variety applications from electronics, sensors, microelectromechanical systems, Lab-on-a-Chip devices as well medical implants such the cochlear implant. The high electrical conductivity, melting point, chemical resilience, catalytic activity, and biocompatibility make Pt material choice these applications. However, microstructuring especially 3D challenging mostly done using vapour-based techniques, which are restricted achievable...

Due to high optical transparency combined with thermal and chemical stability transparent fused silica glass is of interest for many applications in microsystems engineering, especially the field microfluidics micro optics. However, structuring inherently difficult usually includes temperatures, complicated toxic etching processes or time consuming grinding protocols severe limitation freedom design manufacturing speed. Thus, complex structured has been limited on industrial scale. We...

Front Cover: Polyhydroxymethylene (PHM) represents a high molecular weight sugar alcohol unparalleled in nature and tailored by free radical vinylene carbonate polymerization followed hydrolysis aminolysis. Applications of PHM the corresponding polyhydroxymethylene urethanes include hydrogels, asymmetric membranes, collagen blends, electrospun (nano) fiber nonwovens, scaffolds with hierarchic pore architectures interest for regenerative medicine healthcare. In article number 2000132 Rolf...

Abstract Superhydrophobicity can be achieved by combining sufficiently low surface energy with a suitable roughness. Repellency in such surfaces is the result of so‐called Salvinia layer, small layer air trapped between superhydrophobic and wetting fluid that prevents touching surface. The drawback its instability due to either shear forces or dissolving passing fluid. When lost, coating loses properties. direct observation high interest for many applications, specially determining behavior...

Melt-Extrusion-Based Additive Manufacturing Glass is of outmost importance for many applications in science, industry, and everyday life. In article number 2103180, Frederik Kotz-Helmer co-workers present melt extrusion based additive manufacturing thermoplastic nanocomposites which are subsequently converted to transparent fused silica glass. The cover shows Erlenmeyer flasks fabricated by this process.