A laboratory study finds that ball-milled wood biochar reduces silver ions to silver nanoparticles only under weakly alkaline conditions, driven by superoxide radicals. Nano-biochar turns toxic silver ions into nanoparticles only when pH rises Silver ions are among the more…
Researchers from North Carolina State University and Duke University have created the first entropy-stabilized alloy that incorporates oxides – and demonstrated conclusively that the crystalline structure of the material can be determined by disorder at the atomic scale rather than chemical…
A Co₃O₄/ZnS heterojunction achieved sacrificial-agent-free photocatalytic ammonia synthesis from N₂ and water at 607.6 µg·h⁻¹·gcat⁻¹, retaining 98.4% of its activity over five cycles. Chemists have reported a cobalt oxideâzinc sulfide heterostructure that converts nitrogen and water into ammonia using only…
When glucose concentration was varied, the resonance frequency shifted systematically and monotonically, spanning from 0.719 to 0.714 THz. The design provides a usable tuning bandwidth of 30 GHz across the clinically significant concentration range, meaning the resonance moves in a predictable direction as…
Researchers provide new insights about singlet oxygen and set the stage for better understanding of this highly reactive and challenging substance. Singlet oxygen is an electronically excited state of oxygen that is less stable than normal oxygen. Its high reactivity…
Researchers have designed a flexible pressure sensor that is expected to have a much wider applicability. A KAIST research team fabricated a piezoresistive pressure sensor of high uniformity with low hysteresis by chemically grafting a conductive polymer onto a porous…
Selenium nanoparticles synthesized with an aqueous extract of the plant Crataegus songarica showed antifungal, anticancer, anti-inflammatory and antidiabetic activity in a new laboratory study, with particle sizes averaging 83 nanometers and strong colloidal stability. A suite of characterization techniques, including FTIR,…
A laboratory study reports that magnesium oxide nanoparticles synthesised with turnip leaf extract inhibited multidrug-resistant Gram-negative bacteria and reduced established biofilms by up to 99 percent.
A critical review and a new experimental case study show that pH, temperature, and plant-extract concentration must be tuned together, with Astrocaryum aculeatum extract at 15 g L⁻¹ proving the most favorable concentration among those tested for producing stable silver nanoparticles.
Researchers engineered a dual-layer alginate composite around magnetic nanoparticles and enzymes, preserving full activity below 80 °C and retaining over 70 percent activity after 20 reuse cycles.
Chemistry at the nanoscale: molecular machines, DNA nanotechnology, nanopores, nanofabrication and nanostructures built atom by atom.
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