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Nanotechnology Spotlight

Behind the buzz and beyond the hype:
Our Nanowerk-exclusive feature articles

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Showing Spotlights 1 - 8 of 1770 in category (newest first):

 

Pomegranates are good for your renewable energy systems

doped_graphene_frameworkResearchers have been looking to design catalyst materials that can significantly enhance the performance of oxygen evolution reaction (OER), a key eletrode reaction that is an enabling process for many energy storage options such as direct-solar and electricity-driven water splitting and rechargeable metal-air batteries. However, OER suffers from sluggish kinetics - but a novel material inspired by the pomegranate might change that.

Posted: Jul 2nd, 2015

Flexible FeRAM fabricated with CMOS-compatible approach

flexible_electronicsResearchers have demonstrated the fabrication flexible ferroelectric random access memory (FeRAM) devices using state-of-the-art CMOS processes (sputtering, photolithography, and reactive ion etching). This bridges the existing gap between rigid inflexible semiconductor high performance, integration density, yield, and reliable electronics and highly flexible polymer/hybrid materials based relatively low performance electronics. This enables combining the best of two worlds to obtain flexible high performance electronics.

Posted: Jul 1st, 2015

Trapping individual metal nanoparticles in air

trapped_nanoparticlesWhile there is a great deal of knowledge on optical manipulation of metallic nanoparticles in liquids, aerosol trapping of metallic nanoparticles is essentially unexplored. In general, very little is known about optical manipulation of any type of particle in air, where the physics appear to be rather different than in water. The just demonstrated ability to manipulate and study individual metallic or semiconductor nanostructures in air or vacuum opens up many exciting opportunities.

Posted: Jun 30th, 2015

3D-shaping graphene - swell it, shrink it, adapt it

nanostructureGetting from 2D to 3D has been quite a challenge for the graphene community. The transfer of two-dimensional graphene onto three-dimensional surfaces has proven to be difficult due to the fractures in graphene caused by local stresses. New research is bound to change that. Scientists have demonstrated graphene integration into a variety of different microstructured geometries - pyramids, pillars, domes, inverted pyramids, as well as the integration of hybrid structure of graphene decorated with gold nanoparticles on 3D structures.

Posted: Jun 29th, 2015

New 'smart' nanoparticle platform for cancer thermotherapy

thermotherapyMicrowave hyperthermia is one of the most important clinical thermotherapy techniques, however, it is often difficult to apply heat locally to a tumor. By bringing together experts in medicine with experts in nanotechnology, researchers aim to explore the possibilities of designing microwave sensitive agents, which focus the destructive effects of microwaves specifically onto tumor cells. Scientists have now proposed a novel approach to apply micro- and nanomaterials as microwave susceptible agents in tumor hyperthermia in vivo for the first time.

Posted: Jun 26th, 2015

Bioinspired nanofur could significantly reduce underwater drag of marine vessels

nanofurObservations made on a fern and an insect have led researchers to develop a nanofur structure that significantly reduces fluid drag. Both have surfaces covered by high density hairs which allow them to keep an air layer under water. This enables the bug to move nimbly and swiftly through the water by reducing the drag on its surface. Based on these observations, researchers have developed a very inexpensive, highly scalable method to produce a superhydrophobic, air retaining biomimetic surface - a 'nanofur' - which shows not only a high long-term stability but also a high resistance against additional applied pressure.

Posted: Jun 22nd, 2015

A magnetic-assisted, self-healing supercapacitor

magnetic_selfhealingSelf-healing of a device is different from material self-healing because the devices contain electronic circuits. Self-healing of a device includes materials self-healing plus alignment of electrodes, which is very difficult but essential. Researchers have now come up with the idea of using magnetic force to assist alignment of electrodes in a circuit, facilitating self-healing of the whole device. To realize this idea, they designed and fabricated an electrically and mechanically self-healable yarn-based supercapacitor by wrapping magnetic electrodes with a self-healing carboxylated polyurethane shell.

Posted: Jun 19th, 2015

Novel nanosphere lithography to fabricate tunable plasmonic metasurfaces

nanosphere_lithographyIn conventional nanosphere lithography, the nanosphere configurations in the layers are determined by a spontaneous self-assembly process. Therefore, the final configurations are limited to those with or close to the minimal free energy giving rise to very simple patterns. Researchers have now managed to circumvent this thermodynamical restriction by putting the monolayers in a confined environment and constructing the bilayers with sequential stacking, both of which are critical for the formation of moire patterns.

Posted: Jun 18th, 2015