Showing Spotlights 33 - 40 of 2506 in category All (newest first):
A lithography-free method for printing optical metasurfaces with resonant laser printing can achieve metasurfaces for structural colors, optical holograms, and diffractive optical elements, with an energy consumption of less than 1 nanojoule and a print time down to 1 nanosecond per dot. The performance of this ink-free laser color printing with a resolution of more than 100 000 dpi by far exceeds the output of conventional laser printers. The nanoscale structures made on a multi-layer film are robust and typically could last longer than most inks or pigments.
Mar 24th, 2022
Researchers demonstrate rapid cutting and folding of a printed circuit board (PCB) into complex 3D electronics using only a simple laser cutter. This origami manufacturing technology has the potential to allow faster and cheaper production of 3D electronic devices based on thin shells such as antennas that are poorly suited for current 3D printing methods. The technique relies on a method known as laser forming, where heat from a focused laser generates bending within a target.
Mar 22nd, 2022
Researchers have developed a multifunctional wireless smart mask, capable of identifying mask-wearing conditions and monitoring the frequency and pattern of coughing - which is a common symptom of many respiratory diseases. This novel smart mask is capable of simultaneously monitoring coughs and mask-wearing conditions in a remote and battery-free manner, and most importantly, it provides excellent wearing comfort and breathability. The mask fabric is embedded with a soft and battery-free radio-frequency harmonic transponder that enables continuous, real-time wireless monitoring of coughs and mask wearing.
Mar 21st, 2022
The key to fabricate single-atom catalysts is the confinement of transition metal atoms in the precursor, which remains a critical challenge. Addressing this critical challenge, researchers recently proposed clicking confinement strategy as a new synthesis methodology towards the fabrication of single-atom catalysts. This strategy breaks the restrictions on molecular size or symmetry and significantly broadens the fabrication approaches. It also is of great specificity, ensuring the precise construction of single-atom sites with unique structures or distributions.
Mar 17th, 2022
Since the beginning of the COVID-19 pandemic in 2020, researchers have intensified their efforts to improve the performance of antiviral and antibacterial face masks by adding various functionalities such as metal nanoparticles and herbal extracts to inactivate pathogens, using graphene to make masks photothermal and superhydrophobic, and even using triboelectric nanogenerators to prolong mask lifetime. Based on these works, manufacturers have developed different mask styles and air filtration materials using various nanomaterials.
Mar 14th, 2022
Researchers have developed a novel technique to quantify the helical morphology of gold chiral nanorods. Such nanoparticles exhibit unique properties in a sense that they can change the circular polarization of light. In many cases, these properties are believed to be caused by the helical (or 'screw-like') morphology of the nanoparticles, but until now it was very difficult to objectively analyze their shape. This methodology is the first building block towards a fundamental understanding of the chiroptical activity of nanoparticles.
Mar 10th, 2022
The huge variety of vdW layered 2D materials provides a large potential for advanced 2D nanoelectronics. However, for scalable applications, all vdW layered 2D materials face a common challenge: transitioning from micrometer-scale 2D flakes to wafer-scale. This is necessary for scaling up 2D vdW materials application in the high-end semiconductor industry. A new review describes the structures, properties, wafer-scale growth methods, and applications of a number of representative vdW layered 2D materials.
Mar 8th, 2022
The design of chemical communication networks at the micro/nanoscale is an emergent interdisciplinary topic with potential applications in diverse areas such as sensing, biomedicine, biotechnology, and information and communication technologies. Previously, researchers have demonstrated communication between synthetic microvesicles and one type of cells. Communicating cells from different kingdoms has not been achieved before. Now, scientists report a proof-of-concept study that appears to be the first realization of a programmed cross-kingdom communication involving two species of living cells enabled by nanoparticles.
Feb 25th, 2022