Search

A general approach to constructing room temperature phosphorescence (RTP) materials involves the incorporation of a phosphorescent emitter into a rigid host or polymers with high glass transition temperature. However, these materials often suffer from poor processability and suboptimal mechanical properties, limiting their practical applications. In this work, we developed benzothiadiazole‐based dialkene (BTD‐HEA), a multifunctional phosphorescent emitter with a remarkable yield of intersystem crossing (ΦISC, 99.83 %). Its high triplet exciton generation ability and dialkene structure enable BTD‐HEA to act as a photoinitiator and crosslinker, efficiently initiating the polymerization of various monomers within 120 seconds. A range of flexible phosphorescence gels, including hydrogels, organogels, ionogels, and aerogels were fabricated, which exhibit outstanding stretchability and recoverability. Furthermore, the unique fluorescent‐phosphorescent colorimetric properties of the gels provide a more sensitive method for the visual determination of the polymerization process. Notably, the phosphorescent emission intensity of the hydrogel can be increased by the formation of ice, allowing for the precise detection of hydrogel freezing. The versatility of this emitter paves the way for fabricating various flexible phosphorescence gels with diverse morphologies using microfluidics, film‐shearing, roll coating process, and two/three‐dimensional printing, showcasing its potential applications in the fields of bioimaging and bioengineering. [ABSTRACT FROM AUTHOR]

Nanodiscs are a compelling nanomedicine platform due to their ultrasmall size and distinct disc shape. Current nanodisc formulations are made primarily with synthetic lipid bilayers and proteins. Here, we report a cellular nanodisc made with human red blood cell (RBC) membrane (denoted "RBC‐ND") and show its effective neutralization against bacterial toxins. In vitro, RBC‐ND neutralizes the hemolytic activity and cytotoxicity caused by purified α‐toxin or complex whole secreted proteins (wSP) from methicillin‐resistant Staphylococcus aureus bacteria. In vivo, RBC‐ND confers significant survival benefits for mice intoxicated with α‐toxin or wSP in both therapeutic and prevention regimens. Moreover, RBC‐ND shows good biocompatibility and biosafety in vivo. Overall, RBC‐ND distinguishes itself by inheriting the biological functions of the source cell membrane for bioactivity. The design strategy of RBC‐ND can be generalized to other types of cell membranes for broad applications. [ABSTRACT FROM AUTHOR]

Tumor biomarker‐based theranostics have achieved broad interest and success in recent years. However, single biomarker‐based recognition can cause false‐positive feedback, including the on‐target off‐tumor phenomenon, in the absence of tumor‐specific antigen. Multibiomarker‐based recognition molecules often elicit nonspecific and undesired internalization when they bind to "bystander" cells. We report a universal DNA tetrahedral scaffold (DTS) that anchors on the cell membrane to load multiple aptamers and therapeutics for precise and effective theranostics. This DNA logic‐gated nanorobot (DLGN) not only facilitates precise discrimination among five cell lines, but also triggers synergistic killing of effector aptamer‐tethered synergistic drugs (EASDs) to target cancer cells. Logic‐gated recognition integrated into aptamer‐functionalized molecular machines will prompt fast tumor profiling, in situ capture and isolation, and safe delivery of precise medicine. [ABSTRACT FROM AUTHOR]

The development of multimode photopatterning systems based on supramolecular coordination complexes (SCCs) is considerably attractive in supramolecular chemistry and materials science, because SCCs can serve as promising platforms for the incorporation of multiple functional building blocks. Herein, we report a light‐responsive liquid‐crystalline metallacycle that is constructed by coordination‐driven self‐assembly. By exploiting its fascinating liquid crystal features, bright emission properties, and facile photocyclization capability, a unique system with spatially‐controlled fluorescence‐resonance energy transfer (FRET) is built through the introduction of a photochromic spiropyran derivative, which led to the realization of the first example of a liquid‐crystalline metallacycle for orthogonal photopatterning in three‐modes, namely holography, fluorescence, and photochromism. [ABSTRACT FROM AUTHOR]

Drug Delivery. In their Communication (e202301566), Weiwei Gao, Liangfang Zhang et al. report a nanodisc formulation made with natural human red blood cell membrane and demonstrate its robust application for bacterial toxin neutralization. [ABSTRACT FROM AUTHOR]

In their Communication (e202301566), Weiwei Gao, Liangfang Zhang et al. report a nanodisc formulation made with natural human red blood cell membrane and demonstrate its robust application for bacterial toxin neutralization. Keywords: Bacterial Toxin; Cell Membrane; Cellular Nanodisc; Detoxification; Nanomedicine EN Bacterial Toxin Cell Membrane Cellular Nanodisc Detoxification Nanomedicine 1 1 1 05/09/23 20230515 NES 230515 B Drug Delivery b . Bacterial Toxin, Cell Membrane, Cellular Nanodisc, Detoxification, Nanomedicine. [Extracted from the article]

Magnetic liquid marbles have recently attracted extensive attention for various potential applications. However, conventional liquid marbles based on iron oxide nanoparticles are opaque and inadequate for photo-related applications. Herein, we report the first development of liquid marbles coated with magnetic lanthanide-doped upconversion nanoparticles (UCNPs) that can convert near-infrared light into visible light. Apart from their excellent magnetic and mechanical properties, which are attractive for repeatable tip opening and magnetically directed movements, the resultant UCNP-based liquid marbles can act as ideal miniature reactors for photodynamic therapy of cancer cells. This work opens new ways for the development of liquid marbles, and shows great promise for liquid marbles based on UCNPs to be used in a large variety of potential applications, such as photodynamic therapy for accelerated drug screening, magnetically guided controlled drug delivery and release, and multifunctional actuation. [ABSTRACT FROM AUTHOR]

Regulating the second sphere of homogeneous molecular catalysts is a common and effective method to boost their catalytic activities, while the second sphere effects have rarely been investigated for heterogeneous single‐atom catalysts primarily due to the synthetic challenge for installing functional groups in their second spheres. Benefiting from the well‐defined and readily tailorable structure of graphdiyne (GDY), an Au single‐atom catalyst on amino‐substituted GDY is constructed, where the amino group is located in the second sphere of the Au center. The Au atoms on amino‐decorated GDY displayed superior activity for formic acid dehydrogenation compared with those on unfunctionalized GDY. The experimental studies, particularly the proton inventory studies, and theoretical calculations revealed that the amino groups adjacent to an Au atom could serve as proton relays and thus facilitate the protonation of an intermediate Au−H to generate H2. Our study paves the way to precisely constructing the functional second sphere on single‐atom catalysts. [ABSTRACT FROM AUTHOR]

Uncontrolled dendrites growth and serious parasitic reactions in aqueous electrolytes, greatly hinder the practical application of aqueous zinc‐ion battery. On the basis of in situ‐chemical construction and performance‐improving mechanism, multifunctional fluoroethylene carbonate (FEC) is introduced into aqueous electrolyte to construct a high‐quality and ZnF2‐riched inorganic/organic hybrid SEI (ZHS) layer on Zn metal anode (ZMA) surface. Notably, FEC additive can regulate the solvated structure of Zn2+ to reduce H2O molecules reactivity. Additionally, the ZHS layer with strong Zn2+ affinity can avoid dendrites formation and hinder the direct contact between the electrolyte and anode. Therefore, the dendrites growth, Zn corrosion, and H2 evolution reaction on ZMA in FEC‐included ZnSO4 electrolyte are highly suppressed. Thus, ZMA in such electrolyte realize a long cycle life over 1000 h and deliver a stable coulombic efficiency of 99.1 % after 500 cycles. [ABSTRACT FROM AUTHOR]

A recent article in Angewandte Chemie discusses a new system for photopatterning using a light-responsive liquid-crystalline metallacycle. This system allows for the creation of holographic, fluorescent, and photochromic patterns, which could have applications in optical storage devices for information storage, encryption, and anticounterfeiting. The authors of the article, Haiyan Peng, Lin Xu, and others, explain the potential of this technology in their research. [Extracted from the article]

Mimicking the structures and functions of cells to create artificial organelles has spurred the development of efficient strategies for production of hollow nanoreactors with biomimetic catalytic functions. However, such structure are challenging to fabricate and are thus rarely reported. We report the design of hollow nanoreactors with hollow multishelled structure (HoMS) and spatially loaded metal nanoparticles. Starting from a molecular‐level design strategy, well‐defined hollow multishelled structure phenolic resins (HoMS‐PR) and carbon (HoMS‐C) submicron particles were accurately constructed. HoMS‐C serves as an excellent, versatile platform, owing to its tunable properties with tailored functional sites for achieving precise spatial location of metal nanoparticles, internally encapsulated (Pd@HoMS‐C) or externally supported (Pd/HoMS‐C). Impressively, the combination of the delicate nanoarchitecture and spatially loaded metal nanoparticles endow the pair of nanoreactors with size–shape‐selective molecular recognition properties in catalytic semihydrogenation, including high activity and selectivity of Pd@HoMS‐C for small aliphatic substrates and Pd/HoMS‐C for large aromatic substrates. Theoretical calculations provide insight into the pair of nanoreactors with distinct behaviors due to the differences in energy barrier of substrate adsorption. This work provides guidance on the rational design and accurate construction of hollow nanoreactors with precisely located active sites and a finely modulated microenvironment by mimicking the functions of cells. [ABSTRACT FROM AUTHOR]

Hollow multi‐shelled structures (HoMS), a new family of hierarchical nano/micro‐structured materials, have evoked intensive studies to discover their unique temporal‐spatial ordering features. The theoretical understanding of the general synthetic methods of HoMS, i.e. the sequential templating approach (STA), makes it possible to understand, predict, and control the shell formation process. Herein, a mathematical model is established based on the experiment results, which reveal the appearance of concentration waves in the STA. The numerical simulation results not only correspond well to the experimental observations but also explain the regulation methods. Whereby, the underlying physical essence of STA is elucidated, suggesting that HoMS is the concrete representation of the concentration waves. Thereafter the formation of HoMS is not limited to the solid‐gas reactions through high‐temperature calcination, but could be extended to solution systems under low‐temperature conditions. [ABSTRACT FROM AUTHOR]

Zinc‐Ion Batteries. Jing‐Ping Zhang, Xing‐Long Wu et al. report in their Research Article (e202216934) a ZnF2‐rich hybrid solid‐electrolyte interphase for aqueous zinc‐ion batteries. [ABSTRACT FROM AUTHOR]

Aqueous Zinc-Ion Batteries, Dendrite-Free Zn Anode, Electrolyte Additive, Interfacial Chemistry, SEI Film Jing-Ping Zhang, Xing-Long Wu et al. report in their Research Article (e202216934) a ZnF SB 2 sb -rich hybrid solid-electrolyte interphase for aqueous zinc-ion batteries. Keywords: Aqueous Zinc-Ion Batteries; Dendrite-Free Zn Anode; Electrolyte Additive; Interfacial Chemistry; SEI Film EN Aqueous Zinc-Ion Batteries Dendrite-Free Zn Anode Electrolyte Additive Interfacial Chemistry SEI Film 1 1 1 02/07/23 20230206 NES 230206 B Zinc-Ion Batteries b . [Extracted from the article]

Constructing delicate nano‐/microreactors with tandem active sites in hierarchical architectures is a promising strategy for designing photocatalysts to realize the challenging but attractive CO2 reduction. Herein, hollow multi‐shelled structure (HoMS) based microreactors with spatial ordered hetero‐shells are fabricated, which achieve two‐step CO2‐to‐CH4 photoreduction. The multiple inner CeO2 shells increase the number of active catalytic sites to ensure efficient first‐step reaction for generating CO, along with enriching the local CO concentration. The second‐step CO‐to‐CH4 reaction is consequently induced by amorphous TiO2 (A‐TiO2) composites on the adjacent outer‐most shell, thus realizing the CO2‐to‐CH4 conversion capability using one CeO2@CeO2/A‐TiO2 HoMS. In‐depth explorations in the microreactors provide compositional, structural, and interfacial guidance for engineering HoMS‐based microreactors with temporally–spatially ordered shells toward efficient tandem catalysis. [ABSTRACT FROM AUTHOR]

The construction of responsive antimicrobial carriers with multifunctional and controllable release is an attractive but challenging proposition. Recently developed hollow multishelled structures (HoMSs) offers structural advantages, such as easily modifiable surfaces and mutually influenced shells. Herein, we report a novel pH‐responsive antimicrobial carrier having hierarchical shells as multilevel responsive bodies using polyethylene glycol (PEG) as a gated regulator. The interaction between PEG‐functionalized shells endows them with a pH‐responsive switch and rate‐regulator capability. These features are present in the form of rapid release of molecules wrapped in the outer shell, and controlled diffusion of antimicrobials stored in the inner shell by electrostatic interaction, resulting in a long‐lasting mildew resistance for up to 71 days. The versatility of the hierarchical interactions of HoMSs will inspire the design of promising smart drug carriers. [ABSTRACT FROM AUTHOR]

Currently, the broad use of monovalent aptamers in oncology faces challenges, including insufficient recognition and internalization caused by a finite number of receptors on the cell surface, as well as a confined recognition spectrum. Herein, we describe the development of a dual‐targeting circular aptamer (DTCA) that can recognize two different biomarkers on living cells to augment aptamer–receptor interactions, thus enhancing recognition of the target cells. This improvement not only boosts binding and internalization abilities, but also expands the recognition spectrum of these aptamers to different leukemia cells. Moreover, the stability of DTCA in serum can be significantly improved by an enzyme‐promoted terminal ligation strategy. The chemical incorporation of 5‐fluorodeoxyuridine into DTCA resulted in a pharmaceutically functional aptamer that exhibited excellent selectivity, as demonstrated by its high cytotoxicity against target cancer cells, but not to normal cells. The superiority of our newly developed strategy was further highlighted by its precise tumor‐imaging capability. [ABSTRACT FROM AUTHOR]

Rational nanostructure design has proved fruitful in addressing the bottlenecks of diverse fields. Especially hollow multi‐shelled structures (HoMS) have stood out due to their temporal–spatial ordering mass transfer and buffering effect. Localizing multiple cores in a HoMS is highly desired, which could endow it with more fascinating properties. However, such a structure has been barely reported due to the highly challenging fabrication. Here, we develop a controllable synthesis strategy to realize such a structure, which is applicable for diverse cores and shells. Additionally, cores and shells could be tuned to be homogeneous or heterogeneous, with the core and shell number well controlled. In situ TEM analysis verifies that the inner shell confines the expansion orientation of cores, while the outer shell maintains a stable interface. In addition to energy storage, such structure is also promising for multi‐drug co‐delivery and sequential responsive release as well as tandem catalysis applications. [ABSTRACT FROM AUTHOR]

Amplifying free radical production by chemical dynamic catalysis to cause oxidative damage to cancer cells has received extensive interest for cancer‐specific therapy. The major challenge is inevitable negative modulation on the tumor microenvironment (TME) by these species, hindering durable effectiveness. Here we show for the first time an oxygen vacancy‐rich Bi‐based regulator that allows environment‐adaptive free radical catalysis. Specifically, the regulator catalyzes production of highly toxic O2.− and.OH in cancer cells via logic enzymatic reactions yet scavenges accumulation of free radicals and immunosuppressive mediators in TME‐associated noncancerous cells. Atomic‐level mechanistic studies reveal that such dual‐modal regulating behavior is dominated by oxygen vacancies that well fit for free radical catalytic kinetics, along with distinguished cellular fates of this regulator. With this smart regulator, a "two birds with one shot" cancer dynamic therapy can be expected. [ABSTRACT FROM AUTHOR]

Goldnanostäbchen wurden mit Silica/Polymer ‐ Multischichten versehen, die mit SERS ‐ und Fluoreszenz ‐ Agentien sowie Photosensibilisatoren dotiert sind. Die strukturellen und optischen Eigenschaften sind einstellbar und in Lösung und in vivo stabil. Eine SERS ‐ und Fluoreszenz ‐ Echtzeit ‐ Detektionsmethode mit diesen Strukturen wurde zur Tumordetektion und dann zur photodynamischen Therapie (PDT) genutzt. [ABSTRACT FROM AUTHOR]

Triphenylphosphine (TPP)‐based luminescent compounds are rarely investigated because of the low photoluminescence quantum yield (PLQY). Here, we demonstrate that introducing steric hindrance groups to the TPP moiety and separating the orbitals involved in the transition can drastically suppress the non‐radiative decay induced by structural distortion of TPP in the excited state. High PLQY up to 0.89 as well as thermally activated delayed fluorescence are observed from the intramolecular charge‐transfer (ICT) molecules with substituted TPP donors (sTPPs) in doped films. The red organic light‐emitting diodes employing these emitters achieve comparable external quantum efficiencies to the control device containing a classical phosphorescent dye, revealing the great potential of the ICT emitters based on electrochemically stable sTPPs. [ABSTRACT FROM AUTHOR]

In the study of structure–property relationships for rational materials design, hollow multishell structures (HoMSs) have attracted tremendous attention owing to the optimal balance between mass transfer and surface exposure. Considering the shell structure can significantly affect the properties of HoMSs, in this paper, we provide a novel one‐step strategy to continually regulate the shell structures of HoMSs. Through a simple phosphorization process, we can effectively modify the shell from solid to bubble‐like and even duplicate the shells with a narrow spacing. Benefitting from the structure merits, the fabricated CoP HoMSs with close duplicated shells can promote gas release owing to the unbalanced Laplace pressure, while accelerating liquid transfer for enhanced capillary force. It can provide effective channels for water and gas and thus exhibits a superior electrocatalytic performance in the hydrogen and oxygen evolution reaction. [ABSTRACT FROM AUTHOR]

Electrocatalytic conversion of carbon dioxide into high‐value multicarbon (C2+) chemical feedstocks offers a promising avenue to liberate the chemical industry from fossil‐resource dependence and eventually close the anthropogenic carbon cycle but is severely impeded by the lack of high‐performance catalysts. To break the linear scaling relationship of intermediate binding and minimize the kinetic barrier of CO2 reduction reactions, ternary Cu–Au/Ag nanoframes were fabricated to decouple the functions of CO generation and C−C coupling, whereby the former is promoted by the alloyed Ag/Au substrate and the latter is facilitated by the highly strained and positively charged Cu domains. Thus, C2H4 production in an H‐cell and a flow cell occurred with high Faradic efficiencies of 69±5 and 77±2 %, respectively, as well as good electrocatalytic stability and material durability. In situ IR and DFT calculations unveiled two competing pathways for C2H4 generation, of which direct CO dimerization is energetically favored. [ABSTRACT FROM AUTHOR]

Keywords: Hollow Structure; Hydrogenation; Nanoreactor; Polymer; Supported Catalyst EN Hollow Structure Hydrogenation Nanoreactor Polymer Supported Catalyst 1 1 1 10/18/23 20231023 NES 231023 B Hollow nanoreactors b with a hollow multishelled structure and spatially loaded metal nanoparticles are reported by Jian Liu et al. in their Research Article (e202307096). Hollow Structure, Hydrogenation, Nanoreactor, Polymer, Supported Catalyst Calculations provide insights into the nanoreactors with distinct behaviors due to the differences in the energy barrier of substrate adsorption and steric hindrance. [Extracted from the article]

To boost the performance for various applications, a rational bottom‐up design on materials is necessary. The defect engineering on nanoparticle at the atomic level can efficiently tune the electronic behavior, which offers great opportunities in enhancing the catalytic performance. In this paper, we optimized the surface oxygen vacancy concentration and created the lattice distortion in rare‐earth‐based perovskite oxide through gradient replacement of the B site with valence alternated element. The dual defects make the electron spin state transit from low spin state to high spin state, thus decreasing the charge transport resistance. Furthermore, assembly the modified nanoparticle subunits into the micro‐sized hollow multishelled structures can provide porous shells, abundant interior space and effective contact, which enables an enhanced mass transfer and a shorter charge transport path. As a result, the systemic design in the electronic and nano‐micro structures for catalyst has brought an excellent oxygen evolution performance. [ABSTRACT FROM AUTHOR]

The lithium‐ion capacitor (LIC) has attracted tremendous research interest because it meets both the requirement on high energy and power densities. The balance between effective surface areas and mass transport is highly desired to fabricate the optimized electrode material for LIC. Now, triple‐shelled (3S) Nb2O5 hollow multi‐shelled structures (HoMSs) were synthesized for the first time through the sequential templating approach and then applied for the anode of LIC. The unique structure of HoMSs, such as large efficient surface area, hierarchical pores, and multiple shells, provides abundant reaction sites, decreases the electron transport resistance, and increases the diffusion rate for ion transport. In this case, the best combination performance has been achieved among all the reported Nb2O5‐based materials, which delivered an excellent energy and power densities simultaneously, and superb cycling stability. [ABSTRACT FROM AUTHOR]

Precise control of the micro‐/nanostructures of nanomaterials, such as hollow multi‐shelled structures (HoMSs), has shown its great advantages in various applications. Now, the crystal structure of building blocks of HoMSs are controlled by introducing the lattice distortion in HoMSs, for the first time. The lattice distortion located at the nanoscale interface of SnS2/SnO2 can provide additional active sites, which not only provide the catalytic activity under visible light but also improve the separation of photoexcited electron–hole pairs. Combined with the efficient light utilization, the natural advantage of HoMSs, a record catalytic activity was achieved in solid–gas system for CO2 reduction, with an excellent stability and 100 % CO selectivity without using any sensitizers or noble metals. [ABSTRACT FROM AUTHOR]

Interfacial charge collection efficiency has demonstrated significant effects on the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Herein, crystalline phase‐dependent charge collection is investigated by using rutile and anatase TiO2 electron transport layer (ETL) to fabricate PSCs. The results show that rutile TiO2 ETL enhances the extraction and transportation of electrons to FTO and reduces the recombination, thanks to its better conductivity and improved interface with the CH3NH3PbI3 (MAPbI3) layer. Moreover, this may be also attributed to the fact that rutile TiO2 has better match with perovskite grains, and less trap density. As a result, comparing with anatase TiO2 ETL, MAPbI3 PSCs with rutile TiO2 ETL delivers significantly enhanced performance with a champion PCE of 20.9 % and a large open circuit voltage (VOC) of 1.17 V. [ABSTRACT FROM AUTHOR]

TiO2−x with well‐controlled hollow multi‐shelled structures (HoMSs) were designed and synthesized, via a sequential templating approach (STA), to act as sulfur carrier materials. They were explored as physico‐chemical encapsulation materials. Particularly, the sulfur cathode based on triple‐shelled TiO2−x HoMSs delivered a specific capacity of 903 mAh g−1 with a capacity retention of 79 % at 0.5 C and a Coulombic efficiency of 97.5 % over 1000 cycles. The outstanding electrochemical performance is attributed to better spatial confinement and integrated conductivity of the intact triple‐shell that combine the features of physico‐chemical adsorption, short charge transfer path along with mechanical strength. [ABSTRACT FROM AUTHOR]

Concentration Wave, General Synthesis, Hollow Multishelled Structure, Numerical Simulation, Sequential Templating Approach The discovery of the physical essence behind the formation of HoMS offers a predictive blueprint for creating dynamic HoMS by concentration waves, thereby establishing a valuable framework for future research in the realm of synthetic chemistry. Keywords: Concentration Wave; General Synthesis; Hollow Multishelled Structure; Numerical Simulation; Sequential Templating Approach EN Concentration Wave General Synthesis Hollow Multishelled Structure Numerical Simulation Sequential Templating Approach 1 1 1 07/05/23 20230710 NES 230710 B The concentration-wave-dominated b universal formation mechanism of hollow multi-shelled structures (HoMS) is revealed by numerical simulations, as reported by Wei Ge, Dan Wang, and co-workers in their Research Article (e202302621). [Extracted from the article]

Herein, we present heterogeneous hollow multi‐shelled structures (HoMSs) prepared by exploiting the properties of the metal–organic framework (MOFs) casing. Through accurately controlling the transformation of MOF layer into different heterogeneous casings, we can precisely design HoMSs of SnO2@Fe2O3(MOF) and SnO2@FeOx‐C(MOF), which not only retain properties of the original SnO2‐HoMSs, but also structural information from the MOFs. Tested as anode materials in LIBs, SnO2@Fe2O3 (MOF)‐HoMSs demonstrate superior lithium‐storage capacity and cycling stability to the original SnO2‐HoMSs, which can be attributed to the topological features from the MOF casing. Making a sharp contrast to the electrodes of SnO2@Fe2O3 (particle)‐HoMSs fabricated by hydrothermal method, the capacity retention after 100 cycles for the SnO2@Fe2O3 (MOF)‐HoMSs is about eight times higher than that of the SnO2@Fe2O3 (particle)‐HoMS. [ABSTRACT FROM AUTHOR]

Constructing hollow multi‐shelled structures (HoMSs) has a significant effect on promoting light absorption property of catalysts and enhancing their performance in solar energy conversion applications. A facile hydrothermal method is used to design the SrTiO3−TiO2 heterogeneous HoMSs by hydrothermal crystallization of SrTiO3 on the surface of the TiO2 HoMSs, which will realize a full coverage of SrTiO3 on the TiO2 surface and construct the SrTiO3/TiO2 junctions. The broccoli‐like SrTiO3−TiO2 heterogeneous HoMSs exhibited a fourfold higher overall water splitting performance of 10.6 μmol h−1 for H2 production and 5.1 μmol h−1 for O2 evolution than that of SrTiO3 nanoparticles and the apparent quantum efficiency (AQE) of 8.6 % at 365 nm, which can be mainly attributed to 1) HoMS increased the light absorption ability of the constructed photocatalysts and 2) the SrTiO3−TiO2 junctions boosted the separation efficiency of the photogenerated charge carriers. [ABSTRACT FROM AUTHOR]

Precisely carving of multi‐shelled manganese–cobalt oxide hollow dodecahedra (Co/Mn‐HD) with shell number up to three is achieved by a controlled calcination of the Mn‐doped zeolitic imidazolate framework ZIF‐67 precursor (Co/Mn‐ZIF). The unique multi‐shelled and polycrystalline structure not only provides a very large electrochemically active surface area (EASA), but also enhances the structural stability of the material. The residual C and N in the final structures might aid stability and increase their conductivity. When used in alkaline rechargeable battery, the triple‐shelled Co/Mn‐HD exhibits high electrochemical performance, reversible capacity (331.94 mAh g−1 at 1 Ag−1), rate performance (88 % of the capacity can be retained with a 20‐fold increase in current density), and cycling stability (96 % retention over 2000 cycles). [ABSTRACT FROM AUTHOR]

Determination of subcellular localization and dynamics of mRNA is increasingly important to understanding gene expression. A new convenient and versatile method is reported that permits spatiotemporal imaging of specific non-engineered RNAs in living cells. The method uses transfection of a plasmid encoding a gene-specific RNA aptamer, combined with a cell-permeable synthetic small molecule, the fluorescence of which is restored only when the RNA aptamer hybridizes with its cognitive mRNA. The method was validated by live-cell imaging of the endogenous mRNA of β-actin. Application of the technology to mRNAs of a total of 84 human cytoskeletal genes allowed us to observe cellular dynamics of several endogenous mRNAs including arfaptin-2, cortactin, and cytoplasmic FMR1-interacting protein 2. The RNA-imaging technology and its further optimization might permit live-cell imaging of any RNA molecules. [ABSTRACT FROM AUTHOR]

The article discusses research on the use of carbonaceous microspheres (CMS) in the preparation hollow-oxide microspheres as anode materials necessary in producing lithium-ion batteries (LIB). It acknowledges reversible capacities of anode electrodes that consist of transition-metal oxides, particularly cobalt oxide. It also explains necessity of controlling metal cation diffusion rate and absorption capability of CMS in enabling control over hollow microspheres with CMS templates.

Mehrschichtstrukturen aus Co2+ und einem Porphyrin auf der Oberfläche von reduziertem Graphenoxid (siehe Bild) sind preiswerte und potenziell hoch effiziente Katalysatoren für die Sauerstoffreduktion. Sie sind ähnlich elektrokatalytisch aktiv wie kommerzielle C/Pt ‐ Katalysatoren, verfügen aber über eine bessere Methanolresistenz und Langzeitstabilität. [ABSTRACT FROM AUTHOR]

Innentitelbild: Delicate Control on the Shell Structure of Hollow Spheres Enables Tunable Mass Transport in Water Splitting (Angew. Keywords: duplicate shells; hollow structures; mass transport; multi-shell structures; water splitting EN duplicate shells hollow structures mass transport multi-shell structures water splitting 6906 6906 1 03/23/21 20210322 NES 210322 B Die gezielte Steuerung b der Schalenstruktur von Hohlkugeln führt zu einem verbesserten Stofftransport, wie Dan Wang und Mitarbeiter in ihrem Forschungsartikel auf S. 7002 beschreiben. Duplicate shells, hollow structures, mass transport, multi-shell structures, water splitting. [Extracted from the article]

Batterien. Aus dem Mn‐dotierten zeolithischen Imidazolat‐Gerüst ZIF‐67 wurden dreischalige hohle Mangancobaltoxid‐Dodekaeder erhalten. Diese sind vielversprechend für wiederaufladbare Alkalibatterien, wie R. Yu, D. Wang et al. in der Zuschrift auf S. 1008 zeigen. [ABSTRACT FROM AUTHOR]