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With a kitchen freezer and plant cellulose, an aerogel for therapeutic use is developed

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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.
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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. ....

Jowan Rostami , Division Of Solid Mechanics At Lund University , Polymer Technology , Wallenberg Wood Science Centre , Department Of Engineering Mechanics , Royal Institute Of Technology , Department Of Fibre , Materials Today , Engineering Mechanics , Solid Mechanics , Chemistry Physics Materials Sciences , Polymer Chemistry , பாலிமர் தொழில்நுட்பம் , வாலன்பெர்க் மரம் அறிவியல் மையம் , துறை ஆஃப் பொறியியல் இயக்கவியல் , அரச நிறுவனம் ஆஃப் தொழில்நுட்பம் , துறை ஆஃப் ஃபைபர் , பொருட்கள் இன்று , பொறியியல் இயக்கவியல் , திட இயக்கவியல் , வேதியியல் இயற்பியல் பொருட்கள் அறிவியல் ,

Comb-like etching regulated growth for large-area graphene nanoribbon arrays

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 prob ....

Xiahong Zhou , Jianyao Huang , Le Cai , Xudong Xue , Zhiping Xu , Mechanics Laboratory , National Natural Science Foundation Of China , Institute Of Chemistry , Department Of Engineering Mechanics , National Science , Tsinghua University , Chinese Academy Of Sciences , Beijing Based National Science Review , Chinese Academy , Beijing China , Applied Mechanics Laboratory , Engineering Mechanics , Micro Mechanics , Strategic Priority Research Program , National Natural Science Foundation , லெ காய் , இயக்கவியல் ஆய்வகம் , தேசிய இயற்கை அறிவியல் அடித்தளம் ஆஃப் சீனா , நிறுவனம் ஆஃப் வேதியியல் , துறை ஆஃப் பொறியியல் இயக்கவியல் , தேசிய அறிவியல் ,