Molecular magnets or single molecule-based magnets are usually anti-ferromagnetic (non-magnetic) at room temperature, which so far has limited their use to laboratory environments. As the first successful molecular magnet in a real-world application, an interdisciplinary research group has reported a new 'exotic' molecular magnet compound - iron salen nanoparticles - which shows intrinsic magnetic nature at room temperature as well as anticancer properties.
Notwithstanding the progress in extracting renewable energy from many natural resources through nanotechnologies, some 60 research groups worldwide have now begun to develop triboelectric nanogenerators (TENGs) for harvesting energy from 'good (mechanical) vibrations' including human walking and ocean waves, which are otherwise wasted. Nanostructuring the materials in a TENG device amplifies the produced energy by increasing the contact area of the surfaces. Researchers have found a new way to scalably manufacture large area TENGs with a very high-throughput using off-the-shelf materials.
Recently, great progress has been made in the development of bio-hybrid devices with enhanced biological, mechanical and electrical designs. Several muscular tissue based actuators have been described and devices with cultured heart cells have also been reported to produce electrical outputs.
Now, researchers have demonstrated a novel bio-hybrid system, the 'Cell Generator'. The researchers integrated piezoelectric material with 3D-engineered living constructs for energy harvesting and electricity generation.
You surely remember one of the hallmarks of the Mission: Impossible series that shows a secret agent receiving his instructions on a tape or other device that then self-destructs and goes up in a cloud of smoke. Getting pretty close to this Hollywood scenario, minus the smoke, scientists now have demonstrated remote destruction capability of high performance silicon electronics. They also show that in case of tempering, dislocation, or light exposure, electronics on for instance stolen or lost hard drives can self-destruct.
The electrode in lithium-ion (Li-ion) batteries is an integrated system in which both active materials and binder systems play critical roles in determining its final properties. In order to improve battery performance, a lot of research is focussing on the development of high-capacity active materials. However, without an efficient binder system, these novel materials can't fulfill their potentials. Researchers have now developed a new binder system with a nano-architecture promotes both electron and ion transport, which enhances the energy per unit mass and volume of the electrode.
In two new studies, researchers show that cement plants can have their carbon dioxide exhaust eliminated while co-producing carbon nanotubes. They demonstrate that with their C2CNT (carbon dioxide into carbon nanotubes) process, a wide portfolio of tailored carbon nanotubes, such as those with special shapes or conductivity can be made. C2CNT is a straightforward process that transforms CO2 to carbon nanotubes by molten electrolysis with inexpensive (nickel and steel) electrodes and low voltage. This synthesis consumes only CO2 and electricity, and is constrained only by the cost of electricity.
In recent years, researchers working on de-icing and anti-icing strategies have been inspired by biology and nanotechnology to develop nanocoatings and other nanostructured surfaces. Researchers now have demonstrated the ability to spatially control frost nucleation (ice formation from water vapor) and to manipulate ice crystal growth kinetics. This ice nucleation control and the confinement of ice crystal growth direction through manipulating roughness scale have not been reported before.
Researchers demonstrate a novel mechansim for the realization of an optical waveguide. This opens the possibility to realize a waveguide without any modulation of the refractive index. The optical delay necessary for the beam confinement is not achieved by a local modulation of the speed of light, but through an exotic effect called 'geometric phase'. Geometric phase is a temporal delay associated with changes in the propagation of light polarization, the latter corresponding roughly to the oscillation direction of the electromagnetic field.