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Nanowires (NWs) with radial p‐i‐n junction have advantages, such as large junction area and small influence from the surface states, which can lead to highly efficient material use and good device quantum efficiency. However, it is difficult to make high‐quality core–shell NW devices, especially single NW devices. Here, the key factors during the growth and fabrication process that influence the quality...
The development of cost‐effective and flexible electrodes is demanding in the field of energy storage. Herein, flexible FexOy/nitrogen‐doped carbon films (FexOy/NC‐MOG) are prepared by facile electrospinning of Fe‐based metal–organic gels (MOGs) followed by high‐temperature carbonization. This approach allows the even mixing of fragile coordination polymers with polyacrylonitrile into flexible films...
This study reports on “phase” transitions of Xe condensates in on‐surface confinements induced by temperature changes and local probe excitation. The pores of a metal‐organic network occupied with 1 up to 9 Xe atoms are investigated in their propensity to undergo “condensed solid” to “confined fluid” transitions. Different transition temperatures are identified, which depend on the number of Xe atoms...
In fluorescence‐based assays, usually a target molecule is captured using a probe conjugated to a capture surface, and then detected using a second fluorescently labeled probe. One of the most common capture surfaces is a magnetic bead. However, magnetic beads exhibit strong autofluorescence, which often overlaps with the emission of the reporter fluorescent dyes and limits the analytical performance...
In article number 1803825, Yang‐Kyu Choi and co‐workers demonstrate a nano‐electromechanical (NEM) switch by use of the physical unclonable function (PUF) for high security. This PUF is based on the inherent random stiction arising from microfabrication. To improve a security level, a single NEM switch has more than 4‐states, which are distinguished by a magnitude and a direction of read current....
Controlled drug release systems can enhance the safety and availability but avoid the side effect of drugs. Herein, the concept of DNA complementary base pairing rules in biology is used to design and prepare a photothermal‐triggered drug release system. Adenine (A) modified polydopamine nanoparticles (A‐PDA, photothermal reagent) can effectively bind with thymine (T) modified Zinc phthalocyanine...
Graphene is widely applied as an electrode material in energy storage fields. However, the strong π–π interaction between graphene layers and the stacking issues lead to a great loss of electrochemically active surface area, damaging the performance of graphene electrodes. Developing 3D graphene architectures that are constructed of graphene sheet subunits is an effective strategy to solve this problem...
In this study, integrated plaster‐like micro‐supercapacitors based on medical adhesive tapes are fabricated by a simple pencil drawing process combined with a mild solution deposition of MnO2. These solid micro‐supercapacitors not only exhibit excellent stretchability, flexibility, and biocompatibility, but also possess outstanding electrochemical performances, such as exceptional rate capability...
In article number 1803926, Lin Zhou, Shaohua Wei, and co‐workers design and prepare a controlled release drug delivery system based on the DNA complementary base paring rules in biology between adenine (A) modified polydopamine nanoparticles (A‐PDA) and thymine (T) modified zinc phthalocyanine (T‐ZnPc). T‐ZnPc is effectively released from A‐PDA by an NIR light‐triggered heating process at the tumor...
In article number 1804058, Xian‐He Bu and co‐workers prepare flexible FexOy/nitrogen‐doped carbon (FexOy/NC‐MOG) electrode by facile electrospinning of Fe‐based metal–organic gels (MOGs) followed by high‐temperature carbonization. The tiny FexOy active sites are dispersed in nitrogen‐doped carbon substrates due to the homogeneous distribution of Fe‐based MOGs in the polyacrylonitrile matrix. The special...
In article number 1803051, Kun Qian and co‐workers construct a dual‐functional silver platform for the detection and inhibition of bacteria, toward real case applications and biological understandings. The designed platform achieves defined bioanalysis and targeted biotoxicity.
The sizeable direct bandgap, high mobility, and long spin lifetimes at room temperature offer black phosphorus (BP) potential applications in spin‐based semiconductor devices. Toward these applications, a critical step is creating a magnetic response in BP, which is arousing much interest. It is reported here that ambient degradation of BP, which is immediate and inevitable and greatly changes the...
Photoinduced memory devices with fast program/erase operations are crucial for modern communication technology, especially for high‐throughput data storage and transfer. Although some photoinduced memories based on 2D materials have already demonstrated desirable performance, the program/erase speed is still limited to hundreds of micro‐seconds. A high‐speed photoinduced memory based on MoS2/single‐walled...
Understanding the mechanical stability of granular‐armored liquid marbles is prerequisite for their applications including encapsulation, sensors, microreactions, and miniaturized liquid storage. Most liquid marbles are armored with agglomerated granular structure which complicates the wetting and interacting states of particles, hence, impeding one from understanding the effect of granular size on...
Yolk–shell nanoreactors have received considerable interest for use in catalysis. However, the controlled synthesis of continuous crystalline shells without imperfections or cracks remains challenging. Here, a strategy for the synthesis of yolk–shell metal nanoparticles@covalent organic framework (MNPs@COF) nanoreactors by using MNPs@ZIF‐8 core–shell nanostructures as a self‐template is designed and...
A large potential can be generated when one end of 1D and/or 2D semiconducting nanostructures such as zinc oxide (ZnO) and molybdenum disulfide is exposed to a wide spectrum of chemical molecules. A nanoenergy generator that comprises vertically aligned ZnO nanowires and poly(vinyl chloride‐co‐vinyl‐co‐2‐hydroxypropyl acrylate) is fabricated, and it can generate electricity from various molecules...
In fluorescence‐based assays, the autofluorescence of capture surfaces produces strong background noise. In article number 1803751, Amos Danielli and co‐workers use photobleaching as a method to reduce the autofluorescence of magnetic beads, a commonly used capture surface. The technique yields a 3‐fold improvement in the limit of detection and signal‐to‐noise ratio of a fluorescence‐based immunoassay...
A significant development in the design of a NiCo2S4 3D hierarchical hollow nanoarrow arrays (HNA)‐based supercapacitor binder free electrode assembled by 1D hollow nanoneedles and 2D nanosheets on a Ni foam collector through controlling ionic liquid 1‐octyl‐3‐methylimidazolium chloride ([OMIm]Cl) concentration is reported. The unique NiCo2S4‐HNA electrode acquires high specific capacity (1297 C g...
Detection and inhibition of bacteria are universally required in clinics and daily life for health care. Developing a dual‐functional material is challenging and in demand, engaging advanced applications for both defined bioanalysis and targeted biotoxicity. Herein, magnetic silver nanoshells are designed as a multifunctional platform for the detection and inhibition of bacteria. The optimized magnetic...
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