A composite dressing combining ultralong hydroxyapatite nanowire bio-paper and a calcium alginate hydrogel accelerates wound healing.

An acute wound is the most common type of skin injury. Developing wound dressings with excellent mechanical properties, wound protection, comfort, angiogenic capacity and therapeutic effects is significant for effective treatments, yet remains challenging. Herein, we have designed a novel HAP-Alg composite dressing comprising a complementary ultralong hydroxyapatite (HAP) nanowire bio-paper and calcium alginate hydrogel.

Property of Protection against Simultaneous Action between Atomic Oxygen Erosion and Ultraviolet Irradiation by MIL-53(Al) Coating.

Rapid development of coatings with resistance to the space irradiation environment of low Earth orbit (LEO), which benefits long-duration exploration missions in LEO, improves the challenging urgency of revealing the interaction between atomic oxygen (AO) erosion and ultraviolet (UV) irradiation. Here, we investigated the simultaneous action of AO erosion and UV irradiation using polyimide (PI) and MIL-53(Al)-coated PI, confirming a synergistic enhancement effect of 21.20 and 14.

Topological Defect-Regulated Porous Carbon Nanoribbon for High-Performance Potassium-Ion Batteries.

Potassium-ion batteries (PIBs) using carbonaceous anode materials have attracted a great deal of research interest. However, the large atomic size of potassium ions inevitably leads to huge volume expansion and the collapse of anodes during intercalation, which greatly hinders rate performance and cycling life. In this work, carbon nanotube-derived porous N-doped carbon nanoribbon (CNR) bundles are designed as an anode for PIBs.

Activating Lattice Oxygen by Electrochemical De-Lithiation for Efficient Benzyl Alcohol Oxidation.

Electrocatalytic benzyl alcohol oxidation reaction (EBOR) is a feasible way to produce high-value-added benzaldehyde and benzoic acid. However, the performance of catalyst usually suffers from the high energy barrier for the O─O bonding step resulting in sluggish process. Herein, lattice oxygen activation strategy is proposed by the electrochemical de-lithiation of LiNiO to catalyze the EBOR through direct O─O bonding to significantly enhance the EBOR performance.

Nanomaterials in Smart Energy-Efficient Coatings.

Temperature is a key manifestation of energy, with about 51% of global energy consumption occurring in the form of heat annually [...

Wafer-Scale AgS-Based Memristive Crossbar Arrays with Ultra-Low Switching-Energies Reaching Biological Synapses.

Memristive crossbar arrays (MCAs) offer parallel data storage and processing for energy-efficient neuromorphic computing. However, most wafer-scale MCAs that are compatible with complementary metal-oxide-semiconductor (CMOS) technology still suffer from substantially larger energy consumption than biological synapses, due to the slow kinetics of forming conductive paths inside the memristive units. Here we report wafer-scale AgS-based MCAs realized using CMOS-compatible processes at temperatures below 160 °C.

Buried Interface Modification Toward Efficient CsPbIBr Based Monolithic Perovskite/Organic Tandem Solar Cells.

Wide-bandgap perovskite sub-cells (WPSCs), one of the most crucial components of perovskite-based tandem solar cells (PTSCs), play a critical role in determining the performance of tandem devices. However, confined by the compromised crystallization properties of wide-bandgap perovskites, WPSCs exhibit significantly lower efficiency than their theoretical limit. In particular, for n-i-p structured all-inorganic WPSCs (AIWPSCs), severe nonradiative recombination due to the buried interface defects severely decreases the photovoltaic performance.

Simultaneous Suppression of Phonon Transport and Carrier Concentration for Efficient Rhombohedral GeTe Thermoelectric.

Superior electronic performance due to the highly degenerated Σ valence band (N∼12) makes rhombohedral GeTe a promising low-temperature (<600 K) thermoelectric candidate. Minimizing lattice thermal conductivity (κ) is an essential route for enhancing thermoelectric performance, but the temperature-dependent κ, corelated to T, makes its reduction difficult at low temperature. In this work, a room-temperature κ of ≈0.

Construction of directional electron transfer from Pt to MoO in macroporous structure for efficient hydrogen oxidation.

Hydrogen oxidation reaction (HOR) as the anode reaction in proton exchange membrane fuel cell, usually suffers from the high loading of platinum (Pt) and subsequent CO poisoning especially by using industrial crude hydrogen as fuel. In this work, we propose a directional electron transfer route from Pt to MoO in the macroporous structure to significantly enhance the HOR activity as well as the CO tolerance, which is constructed by interface engineering and defect strategy to anchor highly dispersed Pt nanoparticles onto the three-dimensional MoO-C framework. The optimized 2Pt-MoO-C with 1.

Polar Molecule Intercalation to Weaken P─S Bonding in MnPS Toward Ultrahigh-Capacity Sodium Storage.

Layered transition metal trithiophosphates (TMPS, TM = Mn, Fe, Co, etc.) with high theoretical capacity (>1 300 mAh g) are potential anode materials for sodium-ion batteries (SIBs). However, the strong bonding between P dimers and S atoms in TMPS hinders the efficient alloying reaction between P dimers and Na, resulting in practical capacities much lower than theoretical values.

Rapid Preparation of Conductive Graphite-like Films on Polymer Surfaces via Hydrogen Plasma Technology.

Many special polymer materials with high strength, low density, and high processability have been developed for the substitution of metal products in recent years; however, their electrical insulation properties sometimes limit their application in medicine, electronics, and aerospace fields. Constructing a conductive layer on polymers may be a promising strategy for conquering these problems, but simply obtaining a high-quality conductive layer remains a challenge. Here, we develop a universal strategy to fabricate a conductive graphite-like film on various polymer surfaces based on a simple one-step gas plasma ion implantation method.

Ferroptosis to Pyroptosis Regulation by Iron-Based Nanocatalysts for Enhanced Tumor Immunotherapy.

Immunogenic cell death serves as a pivotal mechanism in enhancing antitumor immunotherapy by engaging both innate and adaptive immune responses. However, a key unanswered question is which mode of cell death, particularly ferroptosis or pyroptosis, serves as the optimal pathway for activating the immune response. In this study, we introduce an innovative iron-based nanocatalytic medicine that strategically regulates ferroptosis to pyroptosis to augment antitumor immunotherapy.

Self-Reconstructed Amorphous CoO/NiCoB Heterostructure Catalysts for Enhanced HER Performance.

Amorphous electrocatalysts exhibit potentials as precursors for triggering the in situ reconstruction to generate the real catalytic active species toward electrochemical processes. In this work, a new kind of amorphous Ni-Co-B alloy pre-catalysts for hydrogen evolution reaction (HER) is reported, which is obtained via a facile electroless plating strategy on the nickel foam (NF). Interestingly, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy and morphological characterizations identify the in situ reconstruction process during HER accompanied by the preferential leaching of surface B species and the formation of amorphous CoO nanosheet arrays as the real active sites.

Monolayer Amphiphiles Hydrophobicize MoS-Mediated Real-Time Water Removal for Efficient Waterproof Hydrogen Detection.

Ensuring water-fouling-free operation of semiconductor-based gas sensors is essential to maintaining their accuracy, reliability, and stability across diverse applications. Despite the use of hydrophobic strategies to prevent external water intrusion, addressing in situ-produced water transport during H detection remains a challenge. Herein, we construct a novel waterproof H sensor by integrating single-atom Ru self-assembly with monolayer amphiphiles embedded in MoS.

Large Room-Temperature Electrocaloric Effect in Lead-Free Relaxor Ferroelectric Ceramics with Wide Operation Temperature Range.

In order to obtain large room-temperature electrocaloric effect (ECE) and wide operation temperature range simultaneously in lead-free ceramics, we proposed designing a relaxor ferroelectric with a (the temperature at which the maximum dielectric permittivity is achieved) near-room temperature and glass addition. Based on this strategy, we designed and fabricated lead-free 0.76NaNbO-0.

Antioxidative Therapy of Alcoholic Liver Injury by Amorphous Two-Dimensional Cobalt Hydroxide Nanocatalyst.

The intake of excessive ethanol will activate an alternative ethanol metabolic pathway in the liver, resulting in the overproduction of reactive oxygen species (ROS), which further leads to alcoholic liver injury (ALI). Although several molecular antioxidants have been utilized in clinics for treating ALI, their efficacies are still less satisfactory. In this work, a nanocatalytic antioxidation therapeutic strategy is proposed for ALI treatment by constructing amorphous Co(OH) nanosheets with catalytic antioxidative property.

A natural killer cell mimic against intracellular pathogen infections.

In the competition between the pathogen infection and the host defense, infectious microorganisms may enter the host cells by evading host defense mechanisms and use the intracellular biomolecules as replication nutrient. Among them, intracellular relies on the host cells to protect itself from the attacks by antibiotics or immune system to achieve long-term colonization in the host, and the consequent clinical therapeutic failures and relapses after antibiotic treatment. Here, we demonstrate that intracellular surviving well even in the presence of vancomycin can be effectively eliminated using an emerging cell-mimicking therapeutic strategy.

Hybridized and engineered microbe for catalytic generation of peroxynitrite and cancer immunotherapy under sonopiezo initiation.

Living therapeutics is an emerging antitumor modality by living microorganisms capable of selective tropism and effective therapeutics. Nevertheless, primitive microbes could only present limited therapeutic functionalities against tumors. Hybridization of the microbes with multifunctional nanocatalysts is of great significance to achieve enhanced tumor catalytic therapy.

Interface kinetic manipulation enabling efficient and reliable MgSb thermoelectrics.

Development of efficient and reliable thermoelectric generators is vital for the sustainable utilization of energy, yet interfacial losses and failures between the thermoelectric materials and the electrodes pose a significant obstacle. Existing approaches typically rely on thermodynamic equilibrium to obtain effective interfacial barrier layers, which underestimates the critical factors of interfacial reaction and diffusion kinetics. Here, we develop a desirable barrier layer by leveraging the distinct chemical reaction activities and diffusion behaviors during sintering and operation.

A bioactive multifunctional dressing with simultaneous visible monitoring of pH values and HO concentrations for promoting diabetic wound healing.

Wound healing in diabetes is a complex physiological process with risks of ulceration and amputation. Real-time monitoring and treatment of diabetic wounds is an effective prevention of further deterioration. Herein, a multifunctional dressing is developed by encapsulating europium-containing bioactive glass (EuBG) and MoO in a biocompatible sodium alginate (SA) dressing (MoO-EuBG-SA), aiming to simultaneously monitor the wound pH value and hydrogen peroxide (HO) concentration, establish an anti-inflammatory microenvironment, and promote wound healing.