Nanotechnology Spotlights

Color mixing for nanoplasmonic painters

plasmonic_printingSimilar to the way painters mix different hues and tones of colors on their palette, researchers demonstrated a method for continuous mixing of different structural colors at the nanoscale on a single pixel. This novel method for structurally generating and mixing vivid colors additively is based on interleaved rectangular lattices of metallic nanoparticles. This coloring approach offers a large individual control over the...

Feb 18, 2020

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Is hematene worth pursuing?

hemateneHematite as a magnetic photocatalyst can support the production of oxygen in its magnetic ground state and thereby improve the efficiency of hydrogen production. When hematite is made thinner, another important improvement in the efficiency of the reaction could be accomplished by expectedly more efficient separation of charge carriers upon the absorption of light on the surface. Scientists now elucidate exactly how optical...

Feb 14, 2020

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Machine learning models accelerate the search for critical electrocatalysts

catalysisOxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) are among the core electrochemical processes in clean energy conversion and storage devices, such as metal-air batteries, water electrolyzers, and fuel cells. Single-atom catalysts have emerged as a new frontier of heterogeneous catalysts for these reactions due to their highly increased coverage of active sites, enhanced...

Feb 13, 2020

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3D-printing of perovskite nanostructures

nanowireOrganic-inorganic metal halide perovskites have emerged as a promising optoelectronic material with exceptional structure and property tunability. This new generation of functional materials possess excellent properties such as large optical absorption, long carrier diffusion length, high carrier mobility, and low-cost solution production process. Fabrication methods based on inkjet printing emerged for patterning such perovskite...

Feb 11, 2020

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Novel magnetic nanostructures for emerging biomedical applications

vortexNew types of magnetic nanostructures have interesting properties that enhance novel medical applications in diagnosis and allow the exploration of new therapeutic techniques. In a new paper, researchers review promising new nanomaterials that can be used in cancer diagnosis and treatment, namely as magnetic resonance imaging (MRI) contrast agents. One especially interesting advance involves exotic spin configurations, like...

Feb 06, 2020

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Detecting diseases with magnetically levitated plasma proteins

protein-analysisProteins present in human plasma mirror a person's physiology and the ability to rapidly profile the plasma proteome holds the promise of a revolution in point-of-care disease diagnosis and therapeutic monitoring. New research findings suggest that levitation patterns of human plasma proteins using a magnetic levitation technique may provide useful information about the health spectrum of individual donors. The study reveals...

Feb 03, 2020

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How tiny misalignments in encapsulated graphene lead to a strong modification of its electronic properties

moire-patternResearchers explain how a higher order periodic modulations due to the encapsulation of graphene between hexagonal boron nitride, called supermoire, affects the electronic and structural properties of graphene, as revealed in three recent independent experiments. High quality graphene samples are of high importance for obtaining and exploiting its theoretically described properties. Utilizing an adequate substrate reduces...

Jan 29, 2020

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Smart soft robotic grippers enabled by self-powered tribo-skins

gripperGrippers or end effectors are an essential tool integrated with robotic arms for implementing grasping and manipulating functions in a variety of tasks, ranging from picking up and holding objects, to digging and sorting, to locomotion and scratching. Engineers have developed a new kind of smart soft actuator, based on the triboelectric nanogenerator (TENG), to fabricate intelligent grippers for robotics, aiming at potential...

Jan 21, 2020

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Magnetically levitating proteins to precisely measure their density

levitating-proteinsThe density of proteins in solution is an important fundamental biophysical quantity that has not been accurately measured yet. This has led to extensive debate in the literature regarding the precise density value of proteins. This rough density metric can often lead to inaccurate estimates on the other physicochemical and composite protein features, especially after their interactions with other materials such as nanoparticles....

Jan 13, 2020

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