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Showing Spotlights 1 - 8 of 458 in category Fabrication Technologies and Devices (newest first):

 

Graphene origami - folding with 'colors'

origami_patternJust like traditional paper origami that results in complicated 3D structures from 2D paper, graphene origami allows the design and fabrication of carbon nanostructures that are not naturally existing but of desirable properties. In a new report, researchers describe how p-type and n-type doping of 2D sheets like graphene in selected areas could be exploited as two 'colors' to guide the sheets into preferred folded shapes where complementarily doped areas maximize their mutual overlap.

Posted: Oct 6th, 2017

Combining scanning probe technologies with microbeads for low-cost, high-resolution optical lithography systems

cantileverAmong the important parameters in optical lithography is the spatial resolution you can get and the time you need to draw your pattern. Systems with regular and fixed patterns can be extremely fast but those systems are based on masks. Mask production is a time consuming and expensive process. So-called mask-less systems can draw unorganized patterns directly on substrates, at the cost of longer process times. Researchers now have presented a new lithographic approach with a high-resolution, low-cost technique based on nanosphere lithography.

Posted: Oct 4th, 2017

Nanocellulose dramatically improves the 3D-printability of carbon nanotubes for wearable electronics

3d-printingResearchers have focused on nanocellulose as a novel biomaterial with industrial and scientific applications, which range from the creation of new kinds of commercially useful materials and uses in medical technology all the way to the food and pharmaceutical industries. Engineers now have developed a new use for nanofibrillated cellulose by combining it with carbon nanotubes to form strong, conductive microfibers through a 3D-printing process. The team's 3D-printed wood nanocellulose-carbon nanotube microfibers combine high electrical conductivity and mechanical strength, which can be potentially used in wearable electronics with high performance and low cost.

Posted: Sep 25th, 2017

Assembling colloidal matter with an opto-thermophoretic strategy (w/video)

colloidsResearchers have developed various assembly approaches, including self-assembly and electric/magnetic field directed assembly, to build diverse colloidal matters. These techniques feature high throughput but with limited structural configurations. Specifically, some of the techniques highly rely on the physical performance of the colloidal particles. In new work, researchers have developed a versatile colloidal assembly strategy - termed opto-thermophoretic assembly (OTA) - to build artificial colloidal matter in a wide range of colloidal materials, sizes, and shape.

Posted: Sep 11th, 2017

Bioactive titanium implant material with multifunctional nano-bio-interface

hip_implantThe implantation of orthopaedic devices is associated with a high risk of post-operative complications that increases substantially with each revision surgery. Researchers now have proposed a two-pronged strategy to address this outstanding clinical problem by combatting infections and providing bioactivity for titanium implants. Their nanostructured surfaces simultaneously are highly antimicrobial as well as bioactive - the goal of combining both functions without inducing cytotoxicity has thus far proved elusive.

Posted: Sep 4th, 2017

Advancing molecular ferroelectric thin-film technologies

ferroelectricsMolecular ferroelectrics are highly desirable as they are environmentally friendly, light-weight, and high spontaneous polarized. Though intensive studies have been focused on molecular ferroelectrics, very few researchers have tried to address the issue of thin film growth. An international research team now presents the first report on the preparation of high-quality large area MOFE films using in-plane liquid phase growth. With this approach, different kinds of novel ferroelectric films can be grown for potential practical applications such as temperature sensing, data storage, actuation, energy harvesting and storage.

Posted: Aug 31st, 2017

2D van der Waals heterostructures with tunable optical-electronic-magnetic coupling

heterostructuresDue to their unique interlayer coupling and optoelectronic properties, van der Waals heterostructures are of considerable interest for the next generation nanoelectronics. Conventional 2D heterostructures usually are composed of two layers of opposite charge carrier type using inorganic materials. One of the challenges when creating 2D heterostructures is the painstaking stacking of the individual components on top of each other. Researchers have now found, for the first time, that there can also be charge transfer (CT) induced interfacial coupling between two different pairs of organic CT layers.

Posted: Aug 23rd, 2017

Nanomanufacturing approach to rapidly optimize and fabricate quasi-random photonic nanostructures

nanolithographyQuasi-periodic and random patterns in nature can exhibit extraordinary functions, such as iridescent color in bird wings, strong adhesion in gecko feet, and water repellency from lotus leaves. However, nature-inspired 3D nanostructures can be prohibitively expensive to make using modern nanoscale manufacturing processes. In new work, researchers a design approach integrated with scalable nanomanufacturing that can rapidly optimize and fabricate quasi-random photonic nanostructures.

Posted: Aug 1st, 2017