Showing Spotlights 33 - 40 of 531 in category Fabrication Technologies and Devices (newest first):
A novel and very promising design strategy for stretchable electronics is based on liquid metals; specifically the use of the oxide shell of liquid gallium alloys to fabricate polymerized liquid metal networks (Poly-LMNs). The novel attribute of these Poly-LMNs is that they increase in conductivity as they are elongated, resulting in the measured resistance across the conductor remaining nearly unchanged as they are stretched to 700% their original length. The implication of this effect is that a circuit can now be designed with a stretchable Poly-LMN wire that won?t change its resistance when stretched.
Oct 3rd, 2019
To make epoxy-graphene nanocomposites, the graphene nanosheets are commonly mixed homogeneously with the epoxy matrix. However, one of the problems that bedevils these nanocomposites is the issue of agglomeration of the nanofillers. Researchers now report that they have sucessfully tackled this dispersion problem by constructing a continuous graphene-based scaffold. The results show that the team's novel strategy boosts the fracture toughness to about 3.6 times that of pure epoxy.
Sep 25th, 2019
Manganese oxides have numerous applications in batteries, supercapacitors, microelectronics and (electro)catalysis. Researchers describe a cheap and fast method for depositing conformal thin films of manganese oxide on nanostructured substrates with close-to-a-monolayer precision, competing with the state-of-the-art atomic layer deposition (ALD). The team's redox layer deposition (RLD) is performed in air, at room temperature, using common and cheap chemicals and simple glassware - literally two beakers.
Aug 13th, 2019
MXenes are a promising class of 2D materials with unique intrinsic physical and chemical properties, including excellent conductivity, hydrophilicity and high density when compared to graphene. 3D-printed architectures composed of MXenes are particularly attractive for energy storage applications such as rechargeable lithium- and sodium-ion batteries, lithium-sulfur batteries and supercapacitors. Researchers now have demonstrated for the first time the possibility to print three-dimensional freestanding MXene objects.
Aug 6th, 2019
The recent interest of nanotechnology researchers in liquid metals is based on the properties that differentiate them from common liquids such as water or organics. In addition to their chemical reactivity, the electronic behavior of these liquids, combined with the strong interatomic interactions throughout the bulk, lead to liquids with high densities, thermal and electrical conductivities, and optical reflectivity (over a wide range of wavelengths). This offers potential new approaches for the synthesis of nanomaterials and investigations of fundamental physics and chemistry at small length scales.
Jul 11th, 2019
Bagasse is a waste plant matter obtained by food industry processes with major potential for several high-value products. An innovative idea of utilizing bagasse is for production of nanocellulose and testing this for wound dressing devices, manufactured by 3D printing. The next step in the development of wound dressings is the personalized aspect of the biomaterials, i.e. wound dressings that are structured and composed of constituents specially selected for a specific wound and wound treatment. Furthermore, sensors could be integrated into wound dressings and thus monitor various aspects of wound development, e.g. moisture and exudates in chronic wounds.
Jun 3rd, 2019
Highly compressible graphene aerogels possess extraordinary properties that exceed the performance of natural materials - superior compressive elasticity; ultrahigh porosity; outstanding tolerance for harsh environment; large specific surface area; high electrical and thermal conductivity. Now, researchers have fabricated graphene aerogel 'bricks' that can be assembled into much larger aerogel structures. These highly oriented and dense microstructures possesses arbitrary macroscale, outstanding compressive strength, superelasticity, and high conductivity.
May 6th, 2019
Inspired by chiral molecular structures, scientists are developing strategies to build artificial chiral materials by mimicking natural molecular structures using functional materials. Specifically, metal nanomaterials exhibit tailorable optical properties upon excitation of surface plasmons and become one of the most promising components to realize chiral optical metamaterials. New work provides a macroscopic model to understand the origin of chirality because the structures of the chiral meta-molecules are observable under a microscope and also the optical chirality is several orders of magnitude stronger than the intrinsic chirality of organic molecules.
Mar 14th, 2019