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Silicon Nanocrystals
In article number 2303464, Dongzhi Chen and co‐workers report a hydrophilic, liquid‐phase dispersed, undoped silicon nanocrystals (UA‐SiNCs) simultaneously exhibiting stable photoluminescence and long‐lived phosphorescence at room temperature. Silicon core and surface groups of the UA‐SiNCs play a crucial role in the multiple‐modal emissions, which are advantageous to future advanced...
Silicon nanocrystals (SiNCs) have attracted extensive attention in many advanced applications due to silicon's high natural abundance, low toxicity, and impressive optical properties. However, these applications are mainly focused on fluorescent SiNCs, little attention is paid to SiNCs with room‐temperature phosphorescence (RTP) and their relative applications, especially water‐dispersed ones. Herein,...
Humidity is one of the most important indicators affecting human health. Here, a pair of covalent organic frameworks (COFs) of positional isomers (p‐COF and o‐COF) for indoor humidity regulation is reported. Although p‐COF and o‐COF have the same sql topology and pore size, they exhibit different water adsorption behaviors due to the subtle differences in water adsorption sites. Particularly, o‐COF...
Due to the sluggish kinetics of the oxygen reduction reaction (ORR) by non‐Pt based catalyst, high loading of catalyst is required to achieve satisfactory fuel cell performance, which inevitably leads to the increase of the catalyst layer thickness with serious mass transport resistance. Herein, a defective zeolitic imidazolate framework (ZIF) derived Co/Fe‐N‐C catalyst with small mesopores (2–4 nm)...
Covalent organic frameworks (COFs) show potentials in prominent photoelectric responses by judicious structural design. However, from the selections of monomers and condensation reactions to the synthesis procedures, the acquisition of photoelectric COFs has to meet overmuch high conditions, limiting the breakthrough and modulation in photoelectric responses. Herein, the study reports a creative “lock‐key...
Age‐related macular degeneration (AMD), especially wet AMD with choroidal neovascularization (CNV), commonly causes blindness in older patients and disruption of the choroid followed by second‐wave injuries, including chronic inflammation, oxidative stress, and excessive matrix metalloproteinase 9 (MMP9) expression. Increased macrophage infiltrate in parallel with microglial activation and MMP9 overexpression...
P2 layered oxides have attracted more and more attention as cathode materials of high‐power sodium‐ion batteries (SIBs). During the charging process, the release of sodium ions leads to layer slip, which leads to the transformation of P2 phase into O2 phase, resulting in a sharp decline in capacity. However, many cathode materials do not undergo P2‐O2 transition during charging and discharging, but...
Ligand‐Free PtAg Nanoalloys
In article number 2206772, Indranath Chakraborty and co‐workers use the atomic pair‐distribution function combined with powder X‐ray diffraction and transmission electron microscopy for structural analysis of ligand‐free PtAg nanoclusters (NCs). They further investigate the intrinsic enzyme‐mimicking properties of these ligand‐free NCs and explored the mechanistic details...
Nanozymes are nanomaterials with biocatalytic properties under physiological conditions and are one class of artificial enzymes to overcome the high cost and low stability of natural enzymes. However, surface ligands on nanomaterials will decrease the catalytic activity of the nanozymes by blocking the active sites. To address this limitation, ligand‐free PtAg nanoclusters (NCs) are synthesized and...
Targeted liposomes, as a promising carrier, have received tremendous attention in COVID‐19 vaccines, molecular imaging, and cancer treatment, due to their enhanced cellular uptake and payload accumulation at target sites. However, the conventional methods for preparing targeted liposomes still suffer from limitations, including complex operation, time‐consuming, and poor reproducibility. Herein, a...
As a core component, the catalyst layer (CL) is widely used in fuel cell, metal‐air battery, and other energy conversion devices. Herein, a highly efficient method for CL preparation via fast current‐driven synthesis followed by pyrolysis is proposed. Compared with previously reported fabrication procedures of zeolite imidazolate frameworks (ZIF)‐based CLs, this method directly deposits the ZIF precursor...
Despite the excellent optoelectronic properties, organic‐inorganic hybrid perovskite solar cells (PSCs) still present significant challenges in terms of ambient stability. CsPbI2Br, a member of all‐inorganic perovskites, may respond to this challenge because of its inherent high stability against light, moisture, and heat, and therefore has gained tremendous attraction recently. However, the practical...
Structural design of the solar‐absorbing layer has been considered as one of the most direct and effective approaches for improving the solar steam generation performance by maximizing the absorption of sunlight, but great challenges in manipulation simplification and structure controllability still remain. Herein, a polyester (PET) fabric covered with a vertically aligned 3D tower‐like ferrosoferric...
Transition‐metal selenides (TMSs) have emerged as prospective anode materials for sodium ion batteries (SIBs), owing to their considerable theoretical capacity and intrinsic high electronic conductivity. Whereas, TMSs still suffer from poor rate capability and inferior cycling stability induced by sluggish kinetics and severe volume changes during de/sodiation processes. Herein, a hierarchical composite...
Hydrogel electrolytes have attracted enormous attention in flexible and safe supercapacitors. However, the interfacial contact problem between hydrogel electrolyte and electrodes, and the environmental instability are the key factors restricting the development of hydrogel‐based supercapacitors. Here, a nucleotide‐tackified adhesive organohydrogel electrolyte is successfully constructed and exhibits...
Organic solar cells (OSCs) can achieve greatly improved power conversion efficiency (PCE) by incorporating suitable additives in active layers. Their structure design often faces the challenge of operation generality for more binary blends. Herein, a simple dithieno[3,2‐b:2′,3′‐d]pyrrole‐rhodanine molecule (DR8) featuring high compatibility with polymer donor PM6 is developed as a cost‐effective third...
In this work, the progress in the design of nonsiliceous mesoporous materials (nonSiMPMs) over the last five years from the perspectives of the chemical composition, morphology, loading, and surface modification is summarized. Carbon, metal, and metal oxide are in focus, which are the most promising compositions. Then, representative applications of nonSiMPMs are demonstrated in energy conversion...
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