Articles

The polyurethane–antimony tin oxide (PU–ATO) composite fibers makes infrared (IR) radiations emitted by an object to be as similar as possible to ambient background radiation such that an IR detection sensor fails to distinguish the target object. Hydrophobic surface of the PU–ATO composite fiber prevent the distortion of the IR and thermal radiation caused by the wetting of the PU–ATO composite fiber with water. The PU–ATO composite fiber-based textile can be applied in wearable IR- and thermal radiation-shielding technologies to shield IR signals generated by objects of diverse and complex shapes.

A data-driven approach, called materials informatics (MI) method, is developed to maximize the inference ability even using a small training dataset. The idea is to use a joint representation with the three descriptors to describe physical and chemical multifaceted perspectives of materials. This ensemble-based machine learning was trained with only 29 training data. Experiments confirmed that the virtual-screening process successfully discovered five oxygen-ion conductors, that have not been reported.

Initiations of magnetic reversals can be described by microstructures of the hot-deformed permanent magnet. Strong dipole fields are applied at magnetic-nucleation sites. Inclinations of easy axes from a nominal easy axis are essential to generate the magnetic nucleation. The magnetization reversal tends to starts from regions in which the grains having tilted easy axis are concentrated. The results of this study show that the performance of the hot-deformed permanent magnet is enhanced by avoiding the concentration of the grains with the tilted easy axis.

In this work, we prepared laser-scribed graphene/LiNi_1/3Mn_1/3Co_1/3O₂ (LSG/NMC) without binder and conductive agent as a new breakthrough cathode through DVD burner. The obtained LSG/NMC delivers not only high capacitance but also rate capability and cyclability. This is because the NMC spacer maximizes the effective area of LSG. This work demonstrates that LSG/NMC cathode can be regarded as a candidate for high-performance hybrid supercapacitor.

Existing healing experiments on self-healing bulk materials typically rely on manual contact of fracture interfaces. Development of 3D-architected lattice structures that can autonomously heal fractures or damages is still an outstanding engineering challenge. This paper presents a class of additively manufactured lattice structures that can autonomously heal fractures by first aligning fracture interfaces through a shape-memory process and then repairing fracture interfaces through a fracture-healing process. Through harnessing the coupling of shape-memory and self-healing, this paper also demonstrates reversible configuration transformations of lattice structures among states of different stiffnesses, vibration transmittances, and acoustic absorptions.

In this paper, the authors present an ultrathin compound metamaterial coat that could make underwater objects simultaneously invisible from the detection of both magnetic field and acoustic wave. The robustness of the methodology to realize this dual functional coat has been verified experimentally in various electromagnetic and acoustic frequency bands.

In this study, we designed an injectable antibacterial hydrogel that was photopolymerized by visible light for the treatment of skin infections. The hydrogel consists of γ-poly(glutamic acid)-glycidyl methacrylate (γ-PGA-GMA) and ε-polylysine-glycidyl methacrylate (ε-PL-GMA). The hydrogels showed the characteristics of injectable and rapid gels, and were easy to use. Importantly, the hydrogels demonstrated high levels of antibacterial activity and biocompatibility. In in vivo infection models, the hydrogels reduced inflammation, promoted wound healing, and shortened the healing time. This highlights the hydrogels as promising candidates for anti-infection and wound healing.

Collective phenomena, such as charge/spin density waves and superconductivity, may change abruptly at the surface or in single layers of layered materials, whose observation may be affected by epitaxial strain. In Niobium diselenide, a stripe charge density wave, in place of a usual triangular one, has been observed at the surface, but not in single-layer. Phonon calculations and total energy calculations shed light on the intrinsic nature of the periodic lattice distortions, finding good agreement with experimental observations of phase separation between triangular and stripe phases, attributing to isotropic compressive strain the emergence of the latter.

Push-pull dye molecules self-assemble into two 2D Kagomé nanoarchitectures composed of a single or two chiral Baravelle spiral triangular trimer enantiomers. Only one of the two nanoarchitectures is able to trap coronene molecules.

ReRAM devices based on halide perovskites have recently emerged as a new class of data storage device, where the switching materials used in these devices have attracted huge attention in recent years. In this study, we compare the resistive switching characteristics of ReRAM devices based on a quasi-2D halide perovskite, (PEA)₂Cs₃Pb₄I₁₃, to those based on 3D CsPbI₃. Astonishingly, the ON/OFF ratio of the (PEA)₂Cs₃Pb₄I₁₃-based memory devices was much higher than that of the CsPbI₃ device. Also this device retained a high ON/OFF current ratio for two weeks under ambient conditions, whereas the CsPbI₃ device degraded rapidly and showed unreliable memory properties after five days. We strongly believe that quasi-2D halide perovskites have potential in resistive switching memory based on their high ON/OFF ratio and long-term stability.

Quantum Dot: Shell cross-linking endows stability: Simple and facile cross-linking chemistry was employed to form the robust network shell on the quantum dot (QD) surface without altering the photoluminescence property of pristine QDs. The resulting shell cross-linked QDs exhibited exceptional tolerance against heat or chemical oxidations. And the exterior brush in QDs can be readily tunable and provide the miscibility with host polymer matrix, resulting in well-defined QD-nanocomposite films. This encapsulation strategy can be generally applicable to many other nanoparticles that are vulnerable to various external stimuli.

In this work, we developed a novel hybrid hydrogel system consisting of glycerol-modified PVA hydrogel reinforced by a 3D printed PCL-graphene composite scaffold. The biocompatible hybrid hydrogel shows desirable mechanical properties matching those of natural load-bearing cartilage, while providing drug release and on-demand photothermal conversion functions. These promising properties may allow their potential applications in load-bearing cartilage repair/replacement and treatment of severe arthritis.

HAADF images of Zn-Sb-Bi (ZSB4) film annealed at 300 °C with heterojunction networks having spinodal-like decomposition morphologies. We reported a controllable multi-state in Bi-Zn₂Sb₃ alloys, including amorphous, intermediate metastable and stable phases, which is a promising candidate for multilevel storage technology. The detailed microstructural investigation confirmed the existence of spinodal-like decomposition caused by Bi-doping, and this can account for the crystallization behaviors and p–n type conversion in Zn-Sb-Bi. The results may offer a new insight into the design of novel chalcogenide-based materials for broad applications in various areas, for example, the ability to form p–n junctions could improve the performance of phase-change memory and thermoelectric devices and allow the direct electronic control of nonlinear optical devices.

Selective Growth of α-form Zinc Phthalocyanine Nanowires for High Water Dispersibility: Metastable α-form zinc phthalocyanine nanowires can be dominantly obtained by increasing the flow rate of carrier gas during physical vapor transport process, which leads to increased water dispersibility and opens the possibility of zinc phthalocyanine nanowires for practical cancer thrapy applications.

In this study, a novel hybrid antibacterial system (HAS) based on graphene oxide (GO) 2D materials for co-delivery of silver nanoparticles (Ag NPs) and sulfadiazine (SD) was fabricated. The antibacterial activity of HAS was enhanced over 3 times due to triple synergy: capping effect of GO, puncture effect of Ag NPs, and inhibitory effect of SD. This study provides new insights into the design and fabrication of antibiosis systems and multifunctional materials and broadens the biomedical applications of 2D materials.

The light-trapping layer increases the travel distance of the light within the photoanode. By adapting light-trapping layers at dye-sensitized solar cells, we increased light absorption in the photoanode with pot shape light-trapping layer. Also we introduced three-dimensional angled array to maximize the photoanode projection area. By using these concepts we achieved 8.5% efficiency at submodule with 5% efficiency cells.

A surface heterojunction is formed in the dandelion-like LTO, resulting in significant enhancement of the photocatalytic performance.

Achieving both high energy and high power densities in one hybrid energy-storage device is highly challenging, yet critically important for many applications. Here, the authors demonstrate that the inherent limitations of batteries and supercapacitors can be solved by developing a quaternary hybrid superstructure electrode using a high-energy biotemplate.

A series of FeO-CeO₂ nanocomposite catalysts (FeCe-x) were successfully fabricated by hydrogen reduction of hydroxide precursors at temperatures (x) between 200–600 °C. A FeCe-300 catalyst with a Fe:Ce ratio of 2-1 exhibited excellent performance for photothermal CO₂ hydrogenation to CO (CO selectivity = 99.87%, CO production rate 19.61 mmol h⁻¹ g_cat⁻¹, excellent stability). The FeO phase was effective in promoting the reverse water-gas shift (RWGS, CO₂ + H₂ → CO + H₂O). Catalysts prepared at higher reduction temperatures contained both Fe⁰ and FeO, with the Fe⁰ catalyzing the Sabatier reaction (CO₂ + 4H₂ → CH₄ + 2H₂O) and thus lowering FeCe-x catalyst selectivity to CO.