Nanotechnology Spotlight – Latest Articles

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Showing Spotlights 33 - 40 of 2226 in category All (newest first):

 

Using DNA molds for templating nanoparticles into 2D patterns

nanopatterningDNA nanotechnology employs DNA as a programmable building material for self-assembled, nanoscale structures with precisely controlled structures, that can lead to improved surface properties relevant to biosensing, materials science, and cell biology. Adding to the available tools for DNA nanopatterning, researchers have demonstrated a novel biotemplating strategy for ordering various nanoparticles into expected two-dimensional (2D) patterns via nanoparticle-surface or nanoparticle-DNA interaction.

Feb 27th, 2019

Plate-like ferroelectric crystals synthesized with the help of MXenes

2D_ferroelectric_crystalPotassium niobate (KNbO3) is a a perovskite ferroelectric crystal that, due to its optical properties, has been found useful in many different areas of materials science research, including electro-optics, piezoelectric, and electronic applications. Researchers have now, for the first time, succeeded in producing large KNbO3 crystals with uniform flat shape, and c-axis texture, which makes the crystals useful for practical electro-optic applications. By using MXenes as precursor materials to grow ferroelectric crystals, their 2D nature is inherited by the ferroelectric crystals.

Feb 25th, 2019

Applications of carbon materials derived from metal-organic frameworks (MOFs)

MOFsDirectly carbonizing from organic precursors is the most frequently used method to prepare nanoporous carbons, widely used as electrode materials, due to its flexibility and simplicity. These materials present certain drawbacks, though, such as low surface areas, disordered structures, and non-uniform sizes, which will greatly limit their applications. However, researchers found that carbon materials derived from metal-organic frameworks (MOFs) could overcome these limitations. A review summarizes the applications of MOF-derived carbon materials.

Feb 20th, 2019

Smart droplets clean and repair surfaces

nanoparticles_on_surfaceResearchers report a fluid-driven nanoparticle transportation clean-and-repair approach that reveals a novel self-healing system that conserves matter, behaves autonomously, and is implemented easily. Debris resting on a substrate is relocated, in one step, from undamaged to damaged regions of the substrate, using functional droplets that recognize and transport the nanoparticles. This simultaneous clean-and-repair approach reveals a novel self-healing system that conserves matter, behaves autonomously, and is implemented easily.

Feb 19th, 2019

Defect-free graphene might solve lithium-metal batteries' dendrite problem

electrode_dendriteThe formation of dendrites on the metal electrodes of lithium metal batteries causes safety and performance concerns. To avoid dendrites, researchers are experimenting with new battery electrolyte chemistries, new separator technologies, and new physical hosts for the lithium metal. Researchers now have discovered a key design rule for Li metal batteries: If you want to suppress dendrites, you have to use a defect-free host. More generally, carbon defects catalyze dendrite growth in metal anodes.

Feb 13th, 2019

Printing solar cells and batteries on paper

Over the past ten years, paper has emerged as a focus area for researchers developing innovative techniques for printed basic electronics components. The goal of this research is to replace plastic substrates with low-cost, versatile and sustainable materials. The main advantages of investing in paper for electronics and energy storage devices are the low cost of the technology; the potentiality to recover device components and recycle the substrate as well as the active materials; and the production of environmentally harmless and biocompatible devices.

Feb 7th, 2019

Large-scale synthesis of metal nanoclusters with thermal shocks

nanoclusterResearchers report significant advances in developing a high-temperature, fast nanomanufacturing technique for the large-scale production of ultra small metal nanoclusters decorated in a graphene host matrix. The size and morphology of the metal nanoclusters can be controlled by varying the reaction temperature and the mass loading of metal salt in the graphene aerosol nanoreactors. This one-step continuous aerosol-based thermal shock technique offers considerable potential for the manufacturing of well-dispersed and uniform nanoclusters stabilized within a host matrix.

Feb 4th, 2019

Material systems used in 4D printing

4D printing allows a 3D printed structure to change its configuration or function with time in response to external stimuli such as temperature, light, water, pH, etc. The basic idea is to manipulate materials at nano and micro levels in order to produce, via 3D printing, materials that can modify their structures over time at the macro level. Based on 4D printing, 3D printed objects from nano- to macroscale can be fabricated as smart devices, metamaterials, and origami for various functional applications in prototype, aerospace, biomedicine, etc.

Jan 31st, 2019