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Ni ions can be aligned by a double-stranded DNA and form a Ni–DNA nanowire. By integrating with the semiconductor circuits it becomes a novel molecular device, which is the first real dual memelement that exhibits functionalities of novel resistor and capacitor with memory, and redox-induced negative differential resistance (NDR) properties. The working mechanism of this novel device is similar to the memcomputing in brain.
Solution-grown single crystals (SCs) of semiconducting methylammonium lead halide perovskites are promising materials for full-colour imaging. Here we show one-pixel photodetector prototype, constructed by stacking three layers of blue-, green- and red-sensitive MAPbCl3, MAPbBr3 and MAPb(Br/I)3 crystals, respectively. This layered structure concept has several advantages: imparting a two- to three-fold reduction in the number of required pixels, three times more efficient light utilization (and thus higher sensitivity) than common Bayer filters scheme, colour moiré suppression and no need for de-mosaic image processing. In addition, the direct band gap structure of perovskites results in optical absorption that is several orders of magnitude greater than silicon.
The stretchable and transparent, large-area electrode using electrospun, ultra-long metal nanofibers (mNFs) shows excellent optoelectronic and mechanical properties. It is mass-producible because of the roll-to-roll process and its fast production speed. The optoelectronic properties can be controlled by adjusting area fraction of mNF network. The large-area heater based on the mNF network exhibits outstanding power efficiency and mechanical reliability. The wireless operation of the wearable heater using Bluetooth is demonstrated.
In this work, we report a novel Dean vortices-induced particle migration phenomenon in spiral inertial microfluidics, which can be utilized for high throughput size-based separation of sub-micrometer synthetic or biological components, aptly termed as high-resolution Dean flow fractionation (HiDFF). We demonstrated enhanced drug release effects in particle-based drug delivery system, as well as single-step purification of circulating extracellular microvesicles from whole blood for rapid immune and vascular health profiling.
Fluorine, the element with the highest electronegativity and low electric polarizability, can produce a variety of characteristics, including specific adsorption sites for molecules as well as flexibility to the host materials. In this review, we will introduce fluorine-functionalized metal–organic frameworks/porous coordination polymers that show unique and unprecedented structures, structural transformations, and gas and vapor adsorption/separation properties derived from the fluorine characteristics.
