Nanotechnology Spotlight – Latest Articles

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Showing Spotlights 25 - 32 of 2358 in category All (newest first):

 

Borophene - the new prodigy in flatland

boropheneBorophene is the name for atomically thin, two-dimensional (2D) sheets of boron. Whereas boron is a nonmetallic semiconductor in its bulk form, it becomes a metallic conductor in 2D, even at a thickness of only one atomic layer. Among 2D materials, borophene has attracted considerable attention owing to its unique chemical structure and impressive electronic conductivity and surface properties. A recent review of the state of borophene research discusses various growth techniques and application areas for borophene and provides an in-depth summary of the material's electronic, optical, thermal, and elastic properties compared to its 2D cousins.

Jul 21st, 2020

Highly sensitive plasmonic metasensors based on atomically thin perovskite

sensorResearchers have designed and fabricated an ultrasensitive plasmonic biosensor with the integration of atomically thin perovskite nanomaterials on metasurfaces. For that purpose, they used an atomically thin perovskite nanomaterial with high absorption rate, sandwiched between hexagonal boron nitride and graphene layers, which enables the precise tuning of the depth of the plasmonic resonance dip. This biosensor can reach an ultra-high plasmonic sensitivity for detecting small-molecule, low-concentration analytes.

Jul 10th, 2020

Fast-charging and high-capacity nanomesh-based cathodes for Li-ion batteries

nanomeshThe concept of nanostructuring of battery electrodes is not new; it has been frequently employed to improve the charging speed and, in some cases, stability of Li-ion electrodes. Researchers now demonstrated 3D-interconnected Ni nanowire meshes as current collectors and structural scaffolds for building nanostructured Li-ion electrodes. This material exhibits a semi-ordered structure and is characterized by some of the highest combined porosity and surface-to-volume ratio among macroporous metals.

Jul 6th, 2020

The superiority of single-layer molybdenum disulfide for water desalination

filtration-membraneResearchers show that a nanoporous MoS2 membrane allows a higher water flux compared with other 2D materials such as graphene, boron nitride and phosphorene. The team dug deeply into the physical reasons behind why MoS2 performed better than other two-dimensional materials in water desalination processes. Through molecular dynamics simulation, they found out that water density near a MoS2 membrane is lower compared to that near other materials, which indicates that water molecules were more likely to transport through the membrane instead of accumulating around it.

Jul 3rd, 2020

Nanoelectromechanical switches based reconfigurable computing

switchesNovel complementary nanoelectromechanical (CNEM) switches based on complementary ferroelectric nanocracks integrate the advantages of ferroelectric and nanoelectromechanical switches, such as nonvolatility, quasi-zero OFF-state leakage current and low operating voltage. These ferroelectric crack-based CNEM switches could realize energy-efficient and high-density reconfigurable computing, which can be specialized to a particular task through its universal programmability, offering large flexibility and short time from design to realization.

Jun 29th, 2020

Medical nanotechnology research for COVID-19

SARS-Cov-2The only options to control and deal with the spread of the Severe Acute Respiratory Syndrome Virus 2 (SARS-CoV-2) are fast, cheap, reliable, and portable means of diagnosing COVID-19 infection (the name of disease caused by SARS-CoV-2); therapeutics to treat the infected; and vaccines to rapidly build up immunization of large parts of the global population. The current crisis demands an urgent analysis of all the available nanotechnology tools. While nanomedicine strategies are in use for the design of the vaccine carriers, there are not enough other nanotechnology approaches being explored to tackle the current outbreak.

Jun 26th, 2020

Exploring the optical behavior of highly dense and randomly distributed nanowire arrays

nanowire-arrayVertical semiconductor nanowire arrays are a promising material for retinal prostheses, which could help restore the eyesight of people suffering from severe retinal diseases. These nanowires could also be used to fabricate bio-inspired photoreceptors and lightweight, highly efficient photovoltaics. In new work, scientists present theoretical and experimental studies on the microscopic optical behavior of highly dense and randomly distributed nanowire arrays embedded in a transparent polymer.

Jun 18th, 2020

A new platform to stretch 2D materials

microheaterThe electronic and optical properties of 2D materials can be controlled by mechanical deformations of their crystal structure. This route to tailor the properties of materials is called strain engineering and it is a rapidly evolving field of research in nanomaterials. Straintronics, however, is somewhat hampered by technical issues related to the fast and reliable control of the applied strain. Researchers have now developed a versatile and straightforward platform to control the biaxial strain in atomically thin layers.

Jun 17th, 2020