Matter最新文献

Electrospinning (E-spinning) and electrospraying (E-spraying) synergism (EES) has unique advantages in terms of controllability and expandability of functional nanomaterials. However, the enormous significance of the cross-scale collaboration of this twins-tech has not aroused widespread recognition and attention in the research community. Here, we first review the development history of E-spinning and E-spraying technologies and clarify how they move from unity to fragmentation. Then, according to the different forms of cooperation, EES is mainly divided into three categories: E-spinning before E-spraying, alternate E-spinning/E-spraying, and simultaneous E-spinning/E-spraying. Next, we summarize the development, application, and challenges of the EES in four different main areas, namely natural environment, energy utilization, human health, and functional membrane regulation. Finally, the challenges, bottlenecks, and development prospects of EES technology in all fields are highlighted, summarized, and discussed from a future perspective.

Chirality induction in organic-inorganic halide perovskite nanocrystals has attracted substantial attention, yet producing circularly polarized luminescence without high magnetic fields or cryogenic settings remains an exacting task. By incorporating a chiral spacer into the crystal lattice and another chiral ligand on the crystal surface, Liu et al. report a polarization degree of 5.2% in mixed-phase perovskite nanocrystals arising from enhanced asymmetric light absorption and delayed spin-flip of photogenerated charge carriers. This work paves the way toward in situ asymmetric photochemical reactions using chiral perovskite nanoscintillators.

Single-molecule white-light emission (SMWLE) materials possessing multiple excited states offer promising prospects for covering the full spectrum of visible light, making them ideal for mimicking sunlight. Nevertheless, crafting these materials and regulating their intricate energy demands have been significant hurdles, necessitating the creation of inventive molecular designs for their future application in energy, molecular biology, and organic electronics.

Covalent organic frameworks (COFs) based on reticular and dynamic covalent chemistry are porous materials with uniform and modifiable pore size, high specific surface area, and structural designability that have attracted widespread burgeoning in membrane separations because of lower mass transport resistance and precision sieving. This critical review focuses on recent advances in COF topology design (two- and three-dimensional COFs) toward membrane building, crucial physicochemical properties of COF-based membranes, synthesis/fabrication methods for COF-based membranes, and state-of-the-art applications of COF-based membranes in sustainable ionic/molecular separations. The perspectives in this fascinating field are discussed in terms of opportunities and challenges for next-generation COF-based membranes for sustainable development.

Ionic liquid (IL)-based gel electrolytes (ionogels) show great potential as quasi-solid-state electrolytes (QSSEs) for lithium-ion batteries (LIBs). However, conventional ionogels face challenges involving complex gelation processes, high gelator content (usually greater than 20 wt %), lower conductivity than neat ILs, and low Li⁺ transference numbers. Here, we create novel lithium salt-containing supramolecular ionogels (SIGs) as efficient QSSEs for LIBs through a simple and environmentally friendly approach. By using a low-molecular-weight gelator, specifically 12-hydroxyoctadecanoic acid, lithium-containing IL electrolytes can be solidified at a gelator concentration of only 2 wt %. The resulting physical ionogels exhibit remarkable characteristics, including high ionic conductivity similar to neat ILs and improved electrochemical stability. In addition, these SIGs demonstrate a distinctive thermally reversible gel-to-sol transition, a quality not attainable in other QSSEs. This feature promotes better electrode/electrolyte contact, enabling excellent battery performance using LiFePO₄, LiNi_0.8Co_0.1Mn_0.1O₂, and LiCoO₂ cathodes, along with Li metal and Li₄Ti₅O₁₂ anodes.

Laser micropropulsion (LMP) is a promising power system for micro-nano satellites. However, current propellants lack enhanced micropropulsion performance and extended service life. To address these challenges, we introduce metal-organic-frameworks (MOFs)-derived Carbon-encapsulated-Nano-Metal Composite (CNMC) through in situ thermal decomposition. CNMC materials combine MOFs' large surface area and porous structure with the benefits of lightweight carbon-based materials. By manipulating the synthesis condition, uniform and highly dense nanoparticles of sizes around 35–121 nm can be achieved. The experimental and numerical studies reveal effective tailoring of LMP performance by adjusting nanoparticle size and metal concentration. Remarkably, CNMC with about 71 nm Cu nanoparticles at 35.3 wt. % exhibits exceptional LMP performance, with 95.02 μN/μg impulse thrust per mass, 42.42% ablated efficiency, and 969.58 s specific impulse. This work provides valuable insights into rational nanoparticle design in carbon-based materials, opening broad applications in LMP technology. Addressing current propellant limitations, this research advances micropropulsion, benefiting future space exploration.

We reveal coherent exciton-phonon interactions in the two-dimensional (2D) layered hybrid organic-inorganic semiconductor silver phenylselenolate (AgSePh). Using femtosecond resonant impulsive vibrational spectroscopy and non-resonant Raman scattering, we identify multiple hybrid organic-inorganic vibrational modes that strongly couple to the excitonic transitions and characterize their behavior. Calculations by density functional perturbation theory show that these strongly coupled modes exhibit large out-of-plane silver atomic motions and silver-selenium spacing displacements. Moreover, analysis of photoluminescence spectral splitting and temperature-dependent peak shifting/linewidth broadening reveals that light emission in AgSePh is most strongly affected by a compound 100 cm⁻¹ mode involving the wagging motion of phenylselenolate ligands and accompanying metal-chalcogen stretching. Finally, red shifting of vibrational modes with increasing temperature reveals a high degree of anharmonicity arising from non-covalent interactions between phenyl rings. These findings reveal the unique effects of hybrid vibrational modes in organic-inorganic semiconductors and motivate future work aimed at specifically engineering such interactions through chemical and structural modification.

Carbon cannot be erased; we are simply moving it from one storage pool to another. Biomass serves as a carbon reservoir through which carbon cycles. Over time and at scale, the working forests, the earth’s most powerful climate regulator and home to a mosaic of vigorously growing trees, sequester atmospheric CO₂ at impressive rates through their harvesting-regrowing cycle. Biomass-derived products extend carbon storage beyond the forests’ capacity in the forms of thousands of consumer products in daily lives, like our furniture and houses. The more we use and recycle these nature-based, carbon-storing materials, the less dependent we are on carbon-intensive fossil products.