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Nanotechnology Spotlight

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Showing Spotlights 49 - 56 of 439 in category Fabrication Technologies and Devices (newest first):


Nanoimprint lithography for the fabrication of efficient low band gap polymer solar cells

nanogratingsIn recent years, polymer solar cells have drawn considerable research interest due to their attractive features including flexibility, semi-transparency, and manufacturability using cost-effective continuous printing processes. However, one challenge limiting their commercialization is the relatively low power conversion efficiency when compared to inorganic solar cells. New work shows that low bandgap polymer solar cells with high efficiency of 5.5% can be fabricated using nanoimprint lithography.

Posted: Nov 12th, 2014

Fully 3D-printed quantum dot LEDs

QLEDResearchers have demonstrated that they can print interwoven structures of quantum dots, polymers, metal nanoparticles, etc, to create the first fully 3D printed LEDs, in which every component is 3D printed. At the fundamental level, 3D printing should be entirely capable of creating spatially heterogeneous multi-material structures by dispensing a wide range of material classes with disparate viscosities and functionalities, including semiconducting colloidal nanomaterials, elastomeric matrices, organic polymers, and liquid and solid metals.

Posted: Nov 5th, 2014

Understanding springs at the nanoscale: a step towards nanorobots

nanospringInspired by nature's ingenious biological designs, researchers have persistently attempted to mimic these biofunctionalities to bring technological breakthroughs. One of these morphologies - the unique shape of a helical coil - is not only interesting from a scientific standpoint but also pivotal, offering DNA its distinctive properties and propelling flagella in viscous fluids, to name a few. With the advent of personalized medicine on the horizon, researchers are now trying to use tiny springs made of carbon nanotubes, i.e. nanocoils, to propel nanorobots to perform microsurgeries.

Posted: Oct 31st, 2014

A nanorobotics platform for nanomanufacturing

nanomotor_lithographyThe complexity and high cost of the state-of-the-art high-resolution lithographic systems are prompting unconventional routes for nanoscale manufacturing. Inspired by natural nanomachines, synthetic nanorobots have recently demonstrated remarkable performance and functionality. Nanoengineers now have invented a new nano-patterning approach, named Nanomotor Lithography, which translates the autonomous movement trajectories of nanomotors, or nanorobots, into controlled surface features that brings a twist to conventional static optical fabrication systems.

Posted: Oct 28th, 2014

Ultra-stretchable silicon for flexible electronics (w/video)

silicon_springResearchers have demonstrated ultra-stretchability in monolithic single-crystal silicon. The design is based on an all silicon-based network of hexagonal islands connected through spiral springs. The resulting single-spiral structures can be stretched to a ratio more than 1000%, while remaining below a 1.2% strain. Moreover, these network structures have demonstrated area expansions as high as 30 folds in arrays. This method could provide ultra-stretchable and adaptable electronic systems for distributed network of high-performance macro-electronics especially useful for wearable electronics and bio-integrated devices.

Posted: Oct 21st, 2014

Cleansing the ionic impurities in LCDs with nanoparticles

ferromagnetic_nanoparticlesImpurities during the production process of liquid crystal devices result in mobile ions that influence the LCs' field-induced switching phenomena, resulting in a phenomenon called image sticking, or ghosting. Researchers now have developed a method to reduce the presence of excess ions by doping LCDs with ferroelectric nanoparticles. They demonstrate that this reduction of free ions has coherent impacts on the LC's conductivity, rotational viscosity, and electric field-induced nematic switching.

Posted: Oct 16th, 2014

Nanotechnology and 3D-printing

nano-racecar3D-printing processes are engineered to use material more efficiently, give designs more flexibility and produce objects more precisely. These 3D printing techniques are reaching a stage where desired products and structures can be made independent of the complexity of their shapes. Applying 3D printing concepts to nanotechnology could bring similar advantages to nanofabrication - speed, less waste, economic viability - than it is expected to bring to manufacturing technologies. here we show examples of current research into 3D printing in nanotechnology.

Posted: Sep 26th, 2014

Graphene accelerates the electro-optic response in ferroelectric liquid crystal displays

liquid_crystals_on_grapheneFerroelectric liquid crystal (FLC) display technology holds the promise of fast switching times, a large viewing angle, and high resolution. FLCs have a spontaneous polarization whose direction is perpendicular to the layer. This spontaneous polarization plays an imperative role in the electro-optic switching of FLCs. Researchers have now developed a technique to amplify the spontaneous polarization by doping graphene into FLCs.

Posted: Sep 18th, 2014