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Magnetotactic Bacteria
Bioinspired synthesis and biosynthesis are often complementary. The study and understanding of the biomineralization process of magnetosomes can provide important guidance to the chemical synthesis of magnetosomes‐like Fe3O4 nanoparticles. Meanwhile, the in‐depth investigations of bioinspired syntheses can in turn bring us closer to nature and reveal the mechanism of biomeralization...
Iron oxide nanoparticles are a kind of important biomedical nanomaterials. Although their industrial‐scale production can be realized by the conventional coprecipitation method, the controllability of their size and morphology remains a huge challenge. In this study, a kind of synthetic polypeptide Mms6‐28 which mimics the magnetosome protein Mms6 is used for the bioinspired synthesis of Fe3O4 nanoparticles...
Nanowire Composites
In article number 2304327, De Gong and co‐workers develop a novel sandwich‐structured assembly strategy to fabricate flexible MXene/AgNW composite thin films with ultrahigh electrical conductivity (up to 27193 S cm−1) and superior multifunctionality. Due to their exceptional temperature‐tolerance and superior versatility, these films demonstrate great potentials in various application...
Flexible composite films have attracted considerable attention due to great potential for healthcare, telecommunication, and aerospace. However, it is still challenging to achieve high conductivity and multifunctional integration, mainly due to poorly designed composite structures of these films. Herein, a novel sandwich‐structured assembly strategy is proposed to fabricate flexible composite thin...
Micro/nano‐robots are powerful tools for biomedical applications and are applied in disease diagnosis, tumor imaging, drug delivery, and targeted therapy. Among the various types of micro‐robots, cell‐based micro‐robots exhibit unique properties because of their different cell sources. In combination with various actuation methods, particularly externally propelled methods, cell‐based microrobots...
2D 2H‐phase MoS2 is promising for electrocatalytic applications because of its stable phase, rich edge sites, and large surface area. However, the pristine low‐conductive 2H‐MoS2 suffers from limited electron transfer and surface activity, which become worse after their highly likely aggregation/stacking and self‐curling during applications. In this work, these issues are overcome by conformally attaching...
2D molybdenum disulfide (MoS2) is developed as a potential alternative non‐precious metal electrocatalyst for energy conversion. It is well known that 2D MoS2 has three main phases 2H, 1T, and 1T′. However, the most stable 2H‐phase shows poor electrocatalysis in its basal plane, compared with its edge sites. In this work, a facile one‐step hydrothermal‐driven in situ porousizing of MoS2 into self‐supporting...
An electrocatalyst composed of RuO2 surrounded by interfacial carbon, is synthesized through controllable oxidization‐calcination. This electrocatalyst provides efficient charge transfer, numerous active sites, and promising activity for pH‐universal electrocatalytic overall seawater splitting. An electrolyzer with this catalyst gives current densities of 10 mA cm−2 at a record low cell voltage of...
Design and development of highly efficient photocatalytic materials are key to employ photocatalytic technology as a sound solution to energy and environment related challenges. This work aims to significantly boost photocatalytic activity through rich indium vacancies (VIn) In2S3 with atomic p–n homojunction through a one‐pot preparation strategy. Positron annihilation spectroscopy and electron paramagnetic...
The huge consumption of single‐use plastic straws has brought a long‐lasting environmental problem. Paper straws, the current replacement for plastic straws, suffer from drawbacks, such as a high cost of the water‐proof wax layer and poor water stability due to the easy delamination of the wax layer. It is therefore crucial to find a high‐performing alternative to mitigate the environmental problems...
Multinary layered 2D nanomaterials can exhibit distinct physicochemical properties and innovative applications as compared to binary 2D nanomaterials due to their unique crystal structures. However, it still remains a challenge for the high‐yield preparation of high‐quality multinary 2D nanosheets. Here, the high‐yield and large‐scale production of two quaternary metal thiophosphate nanosheets are...
Construction of 2D transition metal dichalcogenide (TMD)‐based epitaxial heterostructures with different compositions is important for various promising applications, including electronics, photonics, and catalysis. However, the rational design and controlled synthesis of such kind of heterostructures still remain challenge, especially for those consisting of layered TMDs and other non‐layered materials...
Precise quantification of intracellular iron contents is important to biomedical applications of magnetic nanoparticles. Current approaches for iron quantification rely on specialized instruments while most only yield iron quantities averaged over plenty of cells. Here, a simple and robust approach, combining digital optical microscopy with the Beer–Lambert's law, that allows for imaging stainable...
In article number 2005474, Qi‐Huo Wei, Ning Gu, and co‐workers show that by combining the Beer‐Lambert's law with digital optical microscopy, iron contents in individual cells can be imaged and quantified with high accuracy, better than femtogram per pixel. This technique can be deployed easily in research and clinical labs for studying biomedical applications of magnetic nanoparticles and disease...
Colloidal lithography technology based on monolayer colloidal crystals (MCCs) is considered as an outstanding candidate for fabricating large‐area patterned functional nanostructures and devices. Although many efforts have been devoted to achieve various novel applicatons, the quality of MCCs, a key factor for the controllability and reproducibility of the patterned nanostructures, is often overlooked...
As an important aspect of crystal phase engineering, controlled crystal phase transformation of noble metal nanomaterials has emerged as an effective strategy to explore novel crystal phases of nanomaterials. In particular, it is of significant importance to observe the transformation pathway and reveal the transformation mechanism in situ. Here, the phase transformation behavior of face‐centered...
Hierarchical metal nanostructures containing 1D nanobuilding blocks have stimulated great interest due to their abundant active sites for catalysis. Herein, hierarchical 4H/face‐centered cubic (fcc) Ru nanotubes (NTs) are synthesized by a hard template‐mediated method, in which 4H/fcc Au nanowires (NWs) serve as sacrificial templates which are then etched by copper ions (Cu2+) in dimethylformamide...
A new type of hollow nanostructure featured double metal‐organic frameworks shells with metal nanoparticles (MNPs) is designed and fabricated by the methods of ship in a bottle and bottle around the ship. The nanostructure material, hereinafter denoted as Void@HKUST‐1/Pd@ZIF‐8, is confirmed by the analyses of photograph, transmission electron microscopy, scanning electron microscopy, powder X‐ray...
A facile in situ synthetic method is developed to synthesize metal sulfide nanoparticles based on 2D M‐TCPP (M = Cu, Cd, or Co, TCPP = tetrakis(4‐carboxyphenyl)porphyrin)) metal‐organic framework nanosheets. The obtained CuS/Cu‐TCPP composite nanosheet is used as the active material in photoelectrochemical cells, showing notably increased photocurrent due to the improved exciton separation and charge...
Top‐gate HfS2 field‐effect transistors (FETs) with 5 nm HfO2 as dielectrics are successfully demonstrated, with on/off ratio of 105 and subthreshold swing of 95 mV dec−1. Moreover, due to the self‐functionalization of HfS2, uniform and ultrathin HfO2 film free of pinhole‐like defects could be deposited on HfS2, which is dramatically different from other transition metal dichalcogenide FETs.
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