3D Printed Underwater Scooters

For the first time ever a consumer water sports mobility device will be 75% additively manufactured (AM) with serial-produced, custom 3D-printed parts: 

The material is BigRep’s Pro HT, an easy-to-use filament designed for end-use applications. With a softening resistance of up to 115 °C, it offers a significant increase in temperature resistance (compared to average PLA), and minimal warping and shrinkage, which makes it perfectly suited for marine environments. As a material derived from organic compounds, Pro HT is biodegradable under the correct conditions, CO2 neutral and environmentally friendly.

The underwater scooter, which pulls the diver attached to it forward through the water, is an environmentally friendly, emission-free and low-noise method of exploring marine life without disrupting the eco-system. AMAZEA is an agile underwater scooter based on the “catamaran principle” and replicating a dolphin’s special body ergonomics that enable faster movement.

https://www.electricvehiclesresearch.com/articles/19486/3d-printed-underwater-scooters?stv1=1%3A431652%3A16934

Researchers at Penn State and Purdue University developed new materials for improved single-atom catalysis and future electronics

When bonding noble metals to 2-D materials, interfaces matter

The materials, based on two-dimensional transition metal dichalcogenides (TMDs) that include disulfides, diselenides and tellurides, have a variety of interesting properties that scientists would like to exploit, especially for next-generation electronics and catalysis.

The team deposited the noble metals gold and silver on the two-dimensional TMD substrates and studied how the metals formed and grew on the TMD surfaces. In every case but one, the metals formed zero-dimensional nanoparticles, as theory predicted. But in the case of silver deposited on ditellurides, the silver formed a single atom layer coating the entire substrate.

 

https://phys.org/news/2020-02-bonding-noble-metals-d-materials.html

Flash Graphene from Carbon-Based Waste

A new process introduced at Rice University can turn bulk quantities of just about any carbon source into valuable graphene flakes using a burst of heat and light. 

Flash graphene is made in 10 milliseconds by heating carbon-containing materials to 3,000 Kelvin (about 5,000 degrees Fahrenheit). Temperature is the key to success in the flash process which occurs in a custom-designed reactor that heats material quickly and produces very little excess heat. No solvents are used, keeping the process very clean.

http://compositesmanufacturingmagazine.com/2020/02/creating-flash-graphene-for-composites-from-carbon-based-waste/