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VIDEO: By adding a bit of acid to the acetone, it dissolves the calcium carbonate particles in the aerogel and releases CO2 generating the bubbles that make the material more porous. The. view more
Credit: Jowan Rostami
A new low-cost and sustainable technique would boost the possibilities for hospitals and clinics to deliver therapeutics with aerogels, a foam-like material now found in such high-tech applications as insulation for spacesuits and breathable plasters.
With the help of an ordinary kitchen freezer, this newest form of aerogel was made from all natural ingredients, including plant cellulose and algae, says Jowan Rostami, a researcher in fibre technology at KTH Royal Institute of Technology in Stockholm.
Credit: @Science China Press
The rapid development of silicon-based transistors leads to its integration getting closer to the limit of Moore s law. Graphene is expected to become the next generation of mainstream chip materials due to its ultra-high carrier mobility. However, it is difficult to obtain a high on/off current ratio for intrinsic graphene-based transistor owing to the absence of bandgap. Graphene nanoribbons, which possess a tunable bandgap and unique optoelectrical properties, have attracted extensive attention and exploration.
Nowadays, the preparation of graphene nanoribbons is underdeveloped, and common strategies include the clip of carbon materials (graphene films, carbon nanotubes, or graphite) and direct-growth on a specific substrate surface. All these methods are inspiring but also exhibit narrow scope they require concession steps to prepare precursors or pre-functionalize substrate as templates. The hundreds of nanometers in length, alignment problem and c