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The synthesis and characterization of UiO‐type metal–organic framework nanoparticles (NMOFs) composed of Zr4+ ions bridged by 2,2′‐bipyridine‐5,5′‐dicarboxylic acid ligands and the postmodification of the NMOFs with Cu2+ ions are described. The resulting Cu2+‐modified NMOFs, Cu2+‐NMOFs, exhibit peroxidase‐like catalytic activities reflected by the catalyzed oxidation of Amplex‐Red to the fluorescent...
The complexation between 2‐ureido‐4[1H]‐pyrimidinone (UPy) and 2,7‐diamido‐1,8‐naphthyridine (NaPy) is used to promote the mild chemisorption of a UPy‐functionalized terbium(III) double decker system on a silicon surface. The adopted strategy allows the single‐molecule magnet behavior of the system to be maintained unaltered on the surface.
A Zr‐based metal–organic framework (MOF) catalyst, Pt/Au@Pd@UIO‐66, is assembled, where UIO‐66 is Zr6O4(OH)4(BDC)6 (BDC = 1,4‐benzenedicarboxylate). The gold nanoparticles (NPs) act as the core for the epitaxial growth of Pd shells, and the core–shell monodispersed nanosphere Au@Pd is encapsulated into UIO‐66 to control its morphology and impart nanoparticle functionality. The microporous nature of...
Hepatocellular carcinoma (HCC) is one of the leading causes of cancer‐associated deaths worldwide. There is a lack of efficient therapy for HCC; the only available first‐line systemic drug, sorafenib, can merely improve the average survival by two months. Among the efforts to develop an efficient therapy for HCC, nanomedicine has drawn the most attention, owing to its unique features such as high...
Solution‐processed semiconductor single‐crystal patterns possess unique advantages of large scale and low cost, leading to potential applications toward high‐performance optoelectronic devices. To integrate organic semiconductor micro/nanostructures into devices, various patterning techniques have been developed. However, previous patterning techniques suffer from trade‐offs between precision, scalability,...
Development of fluorescent and electron dense markers is essential for the implementation of correlative light and electron microscopy, as dual‐contrast landmarks are required to match the details in the multimodal images. Here, a novel method for correlative microscopy that utilizes fluorescent nanodiamonds (FNDs) as dual‐contrast probes is reported. It is demonstrated how the FNDs can be used as...
2D molybdenum disulfide (MoS2) possesses excellent optoelectronic properties that make it a promising candidate for use in high‐performance photodetectors. Yet, to meet the growing demand for practical and reliable MoS2 photodetectors, the critical issue of defect introduction to the interface between the exfoliated MoS2 and the electrode metal during fabrication must be addressed, because defects...
As anodes of Li‐ion batteries, copper oxides (CuO) have a high theoretical specific capacity (674 mA h g−1) but own poor cyclic stability owing to the large volume expansion and low conductivity in charges/discharges. Incorporating reduced graphene oxide (rGO) into CuO anodes with conventional methods fails to build robust interaction between rGO and CuO to efficiently improve the overall anode performance...
Liposomal spherical nucleic acids (LSNAs) are an attractive therapeutic platform for gene regulation and immunomodulation due to their biocompatibility, chemically tunable structures, and ability to enter cells rapidly without the need for ancillary transfection agents. Such structures consist of small (<100 nm) liposomal cores functionalized with a dense, highly oriented nucleic acid shell, both...
Metal selenides have great potential for electrochemical energy storage, but are relatively scarce investigated. Herein, a novel hollow core‐branch CoSe2 nanoarray on carbon cloth is designed by a facile selenization reaction of predesigned CoO nanocones. And the electrochemical reaction mechanism of CoSe2 in supercapacitor is studied in detail for the first time. Compared with CoO, the hollow core‐branch...
In article number 1702982, Carlos Escobedo and co‐workers reveal that magnetotaxis enables directed motion of magnetotactic bacteria (MTB) in flows relevant to aquatic environments and biomedical applications. The ability of MTB to overcome a current is influenced by the magnetic field, the flow velocity, and their relative orientation. Magnetotaxis allows simultaneous guidance of multiple MTB along...
In article number 1702667, Jie Xiong, Weidong He, and co‐workers synthesize high‐performance Cu2O/CuO/rGO through a facile single‐step hydrothermal method and employ it as an anode of a lithium‐ion battery, delivering remarkable energy capacity, rate capacity and thermal stability. In the cover, the two “magic” hands represent the 3D hierarchical network of rGO. The robust “magic” network mitigates...
In article number 1703176, Iman S. Roqan and co‐workers report the use of an atomic layer‐deposited TiO2 interlayer between exfoliated MoS2 and electrode to enhance the performance of MoS2 photodetectors. The TiO2 interlayer is inserted through 20 cycled‐atomic layer depositions, leading to significant enhancements in the photo‐responsivity and response‐recovery time.
Magnetotactic bacteria (MTB) play an important role in Earth's biogeochemical cycles by transporting minerals in aquatic ecosystems, and have shown promise for controlled transport of microscale objects in flow conditions. However, how MTB traverse complex flow environments is not clear. Here, using microfluidics and high‐speed imaging, it is revealed that magnetotaxis enables directed motion of Magnetospirillum magneticum...
Clean energy has become an important topic in recent decades because of the serious global issues related to the development of energy, such as environmental contamination, and the intermittence of the traditional energy sources. Creating new battery‐related energy storage facilities is an urgent subject for human beings to address and for solutions for the future. Compared with lithium‐based batteries,...
Ultrathin 2D inorganic nanomaterials are good candidates for lithium‐ion batteries, as well as the micro/nanocage structures with unique and tunable morphologies. Meanwhile, as a cost‐effective method, chemical doping plays a vital role in manipulating physical and chemical properties of metal oxides and sulfides. Thus, the design of ultrathin, hollow, and chemical doped metal sulfides shows great...
Gold nanoparticles (AuNPs) endowed with anisotropic DNA valency are an important class of materials, as they can assemble into complex structures with a minimal number of DNA strands. However, methods to encode 3D DNA strand patterns on AuNPs with a controlled number of unique DNA strands in a predesigned spatial arrangement remain elusive. In this work, a simple one‐step method to yield such DNA‐decorated...
Nitrogen‐doped graphene (NG) with wrinkled and bubble‐like texture is fabricated by a thermal treatment. Especially, a novel sonication‐assisted pretreatment with nitric acid is used to further oxidize graphene oxide and its binding with melamine molecules. There are many bubble‐like nanoflakes with a dimension of about 10 nm appeared on the undulated graphene nanosheets. The bubble‐like texture provides...
The development of effective approaches for preparing large‐area, self‐standing, ultrathin metal‐based nanosheets, which have proved to be favorable for catalytic applications such as water electrolysis, is highly desirable but remains a great challenge. Reported herein is a simple and versatile strategy to synthesize ultrathin Co3O4 and CoP NSs consisting of close‐packed nanoparticles by pyrolyzing...
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