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Nanotechnology Spotlights

Whispers about graphene's electrical properties

whispering-galleryScientists report the experimental results of studying the response characteristics in a millimeter wave band whispering gallery mode sapphire resonator to single-layer graphene at different distances of graphene from the resonator. They found that the evanescent field of the resonance system is extremely sensitive to the environment, surrounding materials and disk coatings. A series of experiments showed that such whispering...

Nov 21, 2018

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Manufacturing open-mesoporous carbon nanofibers for flexible and wearable power sources

metal-air-batteryRecently, researchers have engineered a next-generation battery technology - known as metal-air batteries - which can be easily fabricated into flexible and wristband-like cells. Although metal-air batteries powered devices still are not ready yet for commercial applications, the current studies have established solid evidence that these devices have provided enormous opportunities to develop the next generation of flexible,...

Nov 20, 2018

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Nanotribological printing - a novel 3D nanotechnology fabrication technique

nanostructureA novel nanoscale additive manufacturing technique termed Nanotribological Printing creates structures through tribomechanical and tribochemical surface interactions at the contact between a substrate and an atomic force microscope probe, where material pattern formation is driven by normal and shear contact stresses. This technique advances the field of nanomanufacturing by providing a versatile and easily accessible method...

Nov 13, 2018

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Beta-lead oxide quantum dots

2D-materialIn recent years, black-phosphorus-analogue (BPA) two-dimensional materials have been demonstrated to exhibit promising optoelectronic performances and distinguished ambient stabilities, holding great promise in practical applications. In new work, researchers demonstrated that ultra-small 2D beta-lead oxide quantum dots showed fast carrier dynamics and significantly high photocurrent density and excellent ambient stability....

Nov 06, 2018

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Investigating single-atom catalysis for nitrogen reduction reaction

catalysisThe ability to produce ammonia efficiently from air and water at room temperature and ambient pressure is of great interest in agriculture where it is used in fertilizers. In particular, the electrochemical reduction of nitrogen, in which the conversion of nitrogen to ammonia takes place under mild conditions, is highly relevant for the chemical industry that needs to cope with increasing demands for ammonia and at the same...

Nov 05, 2018

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High-loading graphene composites meet electronic industry's metrics for thermal conductivity enhancement

graphene_fillersResearchers investigated the thermal conductivity and thermal diffusivity of epoxy composites with high loading fractions of graphene and h-BN fillers. They found that the graphene fillers outperformed boron nitride fillers in terms of thermal conductivity enhancement. The surprising finding is that, in the high loading composites with quasi-2D fillers, the apparent cross-plane thermal conductivity of the fillers can be the...

Oct 30, 2018

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Testing nanomedicine in space

spaceResearchers investigated the potentially protective role of nanoceria against oxidative stress associated with microgravity and cosmic radiations in space. Their findings support the application of antioxidant nanomaterials to skeletal muscle tissue culture for protection from the noxious effects of microgravity and cosmic radiations, which result in muscle mass and force loss and limit human operations and permanence in space....

Oct 29, 2018

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Tri-layer silicene may beat bulk GaAs as high-efficiency photovoltaic absorber

siliceneIn the past few years, monolayer and multilayer silicenes have been successfully grown on various metal substrates. Unfortunately, silicene on metal substrate generally exhibits metallic or semi-metallic character without a bandgap, and thus cannot be used as adsorption layer of photovoltaic materials. A new comprehensive investigation of multilayer silicene by means of ab initio swarm-intelligence structure-searching method...

Oct 15, 2018

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Beware the fake graphene

grapheneA new study on worldwide graphene production shows unequivocally that the quality of the graphene produced in the world today is rather poor, not optimal for most applications, and most companies are producing graphite microplatelets. This is possibly the main reason for the slow development of graphene applications, which usually require a customized solution in terms of graphene properties. A conclusion that sounds even...

Oct 09, 2018

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