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In article number 1903525, Wei Han, King Lun Yeung, and co‐workers develop a synthesis approach to binary metal oxides by controlled thermal transformation of bimetallic metal–organic framework precursors. The approach is capable of manipulating the morphology and structure of binary metal oxides as high‐performance environmental catalysts for complete oxidation of volatile organic compounds under...
Mixed transition metal oxides (MTMOs) have enormous potential applications in energy and environment. Their use as catalysts for the treatment of environmental pollution requires further enhancement in activity and stability. This work presents a new synthesis approach that is both convenient and effective in preparing binary metal oxide catalysts (CeCuOx) with excellent activity by achieving molecular‐level...
PtPb@Pt catalysts are very useful and widely applied in various industrial reactions. Here, the phase stability of such catalysts is compared in both CO gas and vacuum conditions at elevated temperatures using aberration‐corrected in situ transmission electron microscopy (TEM). A Pt aggregation process takes place affected by CO gas, which results in direct exposure of the PtPb core to CO. A phase...
A comprehensive understanding of electrochemical and physical phenomena originating the response of electrolyte‐gated transistors is crucial for improved handling and design of these devices. However, the lack of suitable tools for direct investigation of microscale effects has hindered the possibility to bridge the gap between experiments and theoretical models. In this contribution, a scanning probe...
Charge transfer in transition‐metal‐dichalcogenides (TMDs) heterostructures is a prerequisite for the formation of interlayer excitons, which hold great promise for optoelectronics and valleytronics. Charge accumulation accompanied by a charge‐transfer process can introduce considerable effect on interlayer exciton‐based applications; nevertheless, this aspect has been rarely studied up to date. This...
Potassium manganese hexacyanoferrate (KMHCF) is a low‐cost Prussian blue analogue (PBA) having a rigid and open framework that can accommodate large alkali ions. Herein, the synthesis of KMHCF and its application as a high‐performance cathode in sodium‐ion batteries (NIBs) is reported. High‐quality KMHCF with low amounts of crystal water and defects and with homogeneous microstructure is obtained...
Nanocellulose is increasingly considered for applications; however, the fibrillar nature, crystalline phase, and surface reactivity of these high aspect ratio nanomaterials need to be considered for safe biomedical use. Here a comprehensive analysis of the impact of cellulose nanofibrils (CNF) and nanocrystals (CNC) is performed using materials provided by the Nanomaterial Health Implications Research...
For the synthesis of gold–silver bimetallic nanoparticles, the Turkevich method has been the state‐of‐the‐art method for several decades. It is presumed that this procedure results in a homogeneous alloy, although this has been debatable for many years. In this work, it is shown that neither a full alloy, nor a perfect core–shell particle is formed but rather a core–shell‐like particle with altering...
It is shown that tilt grain boundaries (GBs) in bilayer 2D crystals of the transition metal dichalcogenide WS2 can be atomically sharp, where top and bottom layer GBs are located within sub‐nanometer distances of each other. This expands the current knowledge of GBs in 2D bilayer crystals, beyond the established large overlapping GB types typically formed in chemical vapor deposition growth, to now...
In article number 1902528, Yongfeng Mei and co‐workers demonstrate a 3D tubular photodetector based on a rolled‐up molybdenum diselenide microtube to enhance the photoresponsibility of 2D materials. Such a tubular design could boost the efficiency of 2D materials–based photodetectors and hold great potential in the field of 3D optoelectronics.
Photothermal therapy (PTT) has been pre‐clinically used in cancer treatment, but incomplete tumor removal and heat endurance of tumor cells could induce significant tumor relapse. In article number 1902636, Xiaolong Liu, Jingfeng Liu, and co‐workers report a programmable antitumor strategy that combines artificially engineered natural killer cells with anti‐heat endurance of DNAzyme as a powerful...
In article number 1902881, Liang Shi, Jianming Li, Genqiang Zhang, and co‐workers achieve the designed formation of hybrid nanoboxes composed of carbon protected CoSe2 nanoparticles strongly coupled with nitrogen‐doped carbon skeleton (denoted as CoSe2@C∩NC) via a template assisted refluxing process followed by conventional selenization treatment, which enables excellent electrochemical performance...
Developing highly efficient electrocatalysts with earth abundant elements for oxygen evolution reaction (OER) is a promising way to store light or electrical energy in the form of chemical energy. Here, a new type of electrocatalyst with core–shell carbon/NiCo2O4 double microtubes architecture is successfully synthesized through a hydrothermal method combined with the calcination process with wet...
Rational design and synthesis of bifunctional electrocatalysts with high efficiency and low‐cost for overall water splitting is still a challenge. A simple approach is reported to prepare a phosphorus and yttrium codoped cobalt hydroxyfluoride (YP‐Co(OH)F) nanoarray on nickel foam, which displays high‐performance for both hydrogen evolution reaction (HER) and oxygen evolution reaction in alkaline...
Nanodrug‐based cancer therapy is impeded by poor penetration into deep tumor tissues mainly due to the overexpression of hyaluronic acid (HA) in the tumor extracellular matrix (ECM). Although modification of nanoparticles (NPs) with hyaluronidase (HAase) is a potent strategy, it remains challenging to get a uniform distribution of drug at the tumor site because of the internalization of NPs by the...
Atomic force microscopy rheological measurements (Rheo‐AFM) of the linear viscoelastic properties of single, charged colloids having a star‐like architecture with a hard core and an extended, deformable double‐stranded DNA (dsDNA) corona dispersed in aqueous saline solutions are reported. This is achieved by analyzing indentation and relaxation experiments performed on individual colloidal particles...
The separate co‐encapsulation and selective controlled release of multiple encapsulants in a predetermined sequence has potentially important applications for drug delivery and tissue engineering. However, the selective controlled release of distinct contents upon one triggering event for most existing microcarriers still remains challenging. Here, novel microfluidic fabrication of compound‐droplet‐pairs‐filled...
Transition metal dichalcogenides, as a kind of 2D material, are suitable for near‐infrared to visible photodetection owing to the bandgaps ranging from 1.0 to 2.0 eV. However, limited light absorption restricts photoresponsivity due to the ultrathin thickness of 2D materials. 3D tubular structures offer a solution to solve the problem because of the light trapping effect which can enhance optical...
The electroreduction of carbon dioxide (CO2) toward high‐value fuels can reduce the carbon footprint and store intermittent renewable energy. The iodide‐ion‐assisted synthesis of porous copper (P‐Cu) microspheres with a moderate coordination number of 7.7, which is beneficial for the selective electroreduction of CO2 into multicarbon (C2+) chemicals is reported. P‐Cu delivers a C2+ Faradaic efficiency...
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