Rotation symmetry mismatch and interlayer hybridization in MoS-black phosphorus van der Waals heterostructures.

Interlayer coupling in 2D heterostructures can result in a reduction of the rotation symmetry and the generation of quantum phenomena. Although these effects have been demonstrated in transition metal dichalcogenides (TMDs) with mismatched interfaces, the role of band hybridization remains unclear. In addition, the creation of flat bands at the valence band maximum (VBM) of TMDs is still an open challenge.

A Mitochondria-Targeted Iridium(iii) Phosphorescent Probe for Selective Detection of Hypochlorite in Living Cells.

Hypochlorous acid(HClO)/hypochlorite ion (ClO) is a highly reactive oxygen species (ROS) that play a crucial role in various biological processes. In this paper, a "turn-on" phosphorescent probe (Ir-TPP) for detecting ClO in mitochondria was designed and synthesized. In solution, Ir-TPP is minimal emission due to rapid isomerization of C=N-OH as an efficient non-radiative decay process.

Matching P- and N-type Organic Electrochemical Transistor Performance Enables a Record High-gain Complementary Inverter.

The charge transport of channel materials in n-type organic electrochemical transistors (OECTs) is greatly limited by the adverse effects of electrochemical doping, posing a long-standing puzzle for the community. Herein, an n-type conjugated polymer with glycolated side chains (n-PT3) is introduced. This polymer can adapt to electrochemical doping and create more organized nanostructures, mitigating the adverse effects of electrochemical doping.

Liquid/Liquid Interfacial Assembly of Poly(methyl methacrylate)-Grafted Nanoparticles into Superlattice Monolayers and Their Application as Floating Gates for High Performance Memory.

Polymer/gold nanoparticle (AuNP) composites have been utilized as floating gates to enhance the performance of memory devices. However, these devices typically exhibit a low ON/OFF drain current ratio (/) and unstable charge trapping, attributed to the poorly defined arrangement of AuNPs within the composite floating gate. To address these limitations, this study employs poly(methyl methacrylate)-grafted AuNPs (Au@PMMA) as building blocks for the fabrication of monolayered superlattice films with a highly ordered structure via liquid/liquid interfacial assembly.

Enhanced Optoelectronic Performance and Polarized Sensitivity in WSe Nanoscrolls Through Quasi-One-Dimensional Structure.

Transition metal dichalcogenides (TMDs), such as tungsten diselenide (WSe), are expected to be used in next-generation optoelectronic devices due to their unique properties. In this study, we developed a simple method of using ethanol to scroll monolayer WSe nanosheets into nanoscrolls. These nanoscrolls have a quasi-one-dimensional structure, which enhances their electronic and optical properties.

Turing covalent organic framework membranes via heterogeneous nucleation synthesis for organic solvent nanofiltration.

Although covalent organic frameworks (COFs) demonstrate notable potential for developing advanced separation membranes, contemporary COF membranes still lack controlled stacking and highly efficient sieving. Here, Turing-architecture COF membranes were constructed by engineering a reaction-diffusion assembly process via heterogeneous nucleation synthesis with tannic acid (TA). TA covalently binds with amine monomers to form a composite precursor with increased reactivity and decreased diffusivity.

Enhancing the Pseudocapacitive Energy Storage of Coordination Polymers by Artificially Constructed Defective Sites Anchoring Redox-Active Species.

Coordination polymers (CPs) have emerged as potential energy storage materials for supercapacitors due to their tunable chemical composition, structural diversity, and multielectron redox-active sites. However, besides poor cycling stability, the practical application of dense CPs in supercapacitors is generally limited by low specific capacitance and high resistance, which are caused by their low specific surface area and dense frameworks, resulting in insufficient redox reactions of metal sites and poor ion diffusion, respectively. Here, we synthesize a new dense CP {CP-1: [Ce(obb)(HCOO)]} via self-assembly of the Ce cation and 4,4'-oxidibenzoate (obb).

Biofilm-based immobilized fermentation of engineered Komagataella phaffii for xylanase production.

This study presented an immobilized fermentation process of engineered Komagataella phaffii with improved biofilm-forming abilities for continuous xylanase production and provided the first insights into the molecular basis of biofilm-based immobilized fermentation of K. phaffii. Overexpression of PAS_chr2-2_0178 and PAS_FragB_0067 in K.

Synthesis of P(V)-Stereogenic Phosphorus Compounds via Organocatalytic Asymmetric Condensation.

Enantioenriched phosphorus(V)-stereogenic compounds, featuring a pentavalent phosphorus atom as the stereogenic center, are crucial in various natural products, drugs, bioactive molecules, and catalysts/ligands. While a handful of stereoselective synthetic approaches have been developed, achieving direct stereocontrol at the phosphorus atom through catalytic generation of phosphorus(V)-heteroatom bonds continues to be a formidable challenge. Here, we disclose an organocatalytic asymmetric condensation strategy that employs a novel activation mode of stable feedstock phosphinic acids by the formation of mixed phosphinic anhydride as the reactive species to facilitate further catalyst-controlled asymmetric P-O bond formations, involving a dynamic kinetic asymmetric transformation (DYKAT) process with alcohol nucleophiles via a cinchonidine-derived bifunctional catalyst.

CRISPR/Cas13a Trans-Cleavage and Catalytic Hairpin Assembly Cascaded Signal Amplification Powered SERS Aptasensor for Ultrasensitive Detection of Gastric Cancer-Derived Exosomes.

Cancer-derived exosomes carry a large number of specific molecular profiles from cancer cells and have emerged as ideal biomarkers for early cancer diagnosis. Accurate detection of ultralow-abundance exosomes in complex biological samples remains a great challenge. Herein, a novel SERS aptasensor powered by cascaded signal amplification of CRISPR/Cas13a -cleavage and catalytic hairpin assembly (CHA) was proposed for ultrasensitive detection of gastric cancer-derived exosomes, which included hairpin-structured recognition aptamers (MUC1-apt), cascaded signal amplification (i.

Investigations of the interactions between ZnO nanorods and H with O NMR spectroscopy.

The interactions between ZnO nanorods and H at different temperatures are revealed with O solid-state NMR spectroscopy in combination with a variety of different characterization methods. These results should enable further understanding of the adsorption properties of H on ZnO nanocrystalline or related nanomaterials.

Peierls Distortion Induced Giant Linear Dichroism, Second-Harmonic Generation, and In-Plane Ferroelectricity in NbOBr.

The Peierls distortion plays an essential role in governing the in-plane ferroelectricity and nonlinear optical characteristics of anisotropic niobium oxide dihalides, such as NbOCl and NbOI. Despite its significance, experimental investigation into the structural, optical, and ferroelectric properties of NbOBr has been lacking. Here, the successful fabrication of centimeter-sized, high-quality NbOBr single crystals, enabling direct observation of Peierls distortion using aberration-corrected scanning transmission electron microscopy, is reported.

Triggered Cascade-Activation Nanoplatform to Alleviate Hypoxia for Effective Tumor Immunotherapy Guided by NIR-II Imaging.

Hypoxia is one of the most typical features among various types of solid tumors, which creates an immunosuppressive tumor microenvironment (TME) and limits the efficacy of cancer treatment. Alleviating hypoxia becomes a key strategy to reshape hypoxic TME which improves cancer immunotherapy. However, it remains challenging to perform tumor precision therapy with controllable switches through hypoxia-activated gene editing and prodrugs to alleviate hypoxia.

Construction of Dual Electric Field Synergistic and Magnetic Recyclable SnFeO/ZnO Photocatalyst.

The recombination of photoinduced carriers hampers the photocatalysis process. Construction of the heterojunction and built-in piezoelectric field boosts the separation of electrons and holes. Herein, a novel magnetic recyclable SnFeO(SFO)/ZnO composite with enhanced photocatalytic performance based on the dual electric field synergism was proposed for the first time.

Multilevel Stimuli-Responsive Smart "Sandwich" Label with Physical Unclonable Functions Bionic Wrinkles and Space-Selective Fluorescence Patterns.

With the increasing popularity of the internet, it brings convenience to lives while also increases security risks. Physical Unclonable Functions (PUFs) can generate random, unclonable, and unique identifiers using their inherent physical characteristics, which have broad prospects in anti-counterfeiting. Herein, inspired by the irregular tree bark fissures and random skin wrinkles found in nature, a method for creating complex micro-wrinkles with unclonable random patterns is proposed by simply stretching hydrogels.

Double-Shell Encapsulation of Lead-Free Tin Halide Perovskite for Self-Powered Smart Windows.

Luminescent solar concentrators (LSC) have the potential application in building integrated photovoltaic (BIPV). 0D tin-based perovskites are a promising embedding phosphor in LSC due to the large Stokes shift and high photoluminescence quantum yield. But the instability and uncontrollable crystal growth are severe limiting their successful utilization in device fabrication.

Infrared optoelectronics in twisted black phosphorus.

Electrons and holes, fundamental charge carriers in semiconductors, dominate optical transitions and detection processes. Twisted van der Waals (vdW) heterostructures offer an effective approach to manipulate radiation, separation, and collection processes of electron-hole pairs by creating an atomically sharp interface. Here, we demonstrate that twisted interfaces in vdW layered black phosphorus (BP), an infrared semiconductor with highly anisotropic crystalline structure and properties, can significantly alter both recombination and separation processes of electron-hole pairs.

Amorphous-Crystalline Interface Induced Internal Electric Fields for Electrochromic Smart Window.

Balancing optical modulation and response time is crucial for achieving high coloration efficiency in electrochromic materials. Here, internal electric fields are introduced to titanium dioxide nanosheets by constructing abundant amorphous-crystalline interfaces, ensuring large optical modulation while reducing response time and therefore improving coloration efficiency. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) reveals the presence of numerous amorphous-crystalline phase boundaries in titanium dioxide nanosheets.

Positively Photo-Responsive Adsorption Over Binary Copper Porphyrin Framework and Graphene Film Sorbents.

Photo-responsive adsorption has emerged as a vibrant area because it provides a promising route to reduce the energy consumption of the traditional adsorption separation. However, the current methodology to fabricate photo-responsive sorbents is still subject to the photo-deforming molecular units. In this study, a new initiative of photo-dissociated electron-hole pairs is proposed to generate amazing adsorption activity, and prove its feasibility.

Dual-Action Calcium Monoaluminate Enabled Room-Temperature Curing of Inorganic Phosphate-Based High-Temperature Adhesive.

High-temperature adhesives find extensive application in diverse domains, encompassing repairs, production processes, and material joining. However, achieving their curing at ambient temperatures remains a formidable challenge due to the inherent requirement of elevated temperatures, typically exceeding 500 °C, for the curing reaction. To overcome this limitation, in this study, we developed a distinctive inorganic phosphate-based composite adhesive by incorporating dual-functional calcium monoaluminate (CA) into a traditional adhesive blend comprising Al(HPO) and MgO.

Recent Progress in the Synthesis of 3D Complex Plasmonic Intragap Nanostructures and Their Applications in Surface-Enhanced Raman Scattering.

Plasmonic intragap nanostructures (PINs) have garnered intensive attention in Raman-related analysis due to their exceptional ability to enhance light-matter interactions. Although diverse synthetic strategies have been employed to create these nanostructures, the emphasis has largely been on PINs with simple configurations, which often fall short in achieving effective near-field focusing. Three-dimensional (3D) complex PINs, distinguished by their intricate networks of internal gaps and voids, are emerging as superior structures for effective light trapping.

Reversible Photochromic Phenomenon of Plasmonic Metal/Semiconductor Heterostructures via Photoinduced Electron Storage.

The transfer and migration process of the photogenerated charge carriers in plasmonic metal/semiconductor heterostructures not only affects their photocatalytic performance but also triggers some captivating phenomena. Here, a reversible photochromic behavior is observed on the Au/CdS heterostructures when they are investigated as photocatalysts for hydrogen production. The photochromism takes place upon excitation of the CdS component, in which the photogenerated holes are rapidly consumed by ethanol, while the electrons are transferred and stored on the Au cores, resulting in the blue shift of their localized surface plasmon resonance.

Harnessing Near-Infrared Light for Highly Efficient Photocatalysis.

Near-infrared (NIR) light, accounting for approximately 50 % of solar light, cannot directly excite photocatalytic reactions due to its lower energy, which severely restricts the photocatalytic solar energy conversion efficiency and hinders the application of photocatalysis. To overcome this dilemma, some viable strategies have been proposed to harness NIR light for enhancing photocatalytic performance based on material structure, composition, and function designs, and obvious progresses have been witnessed. In this review, the basic principles and representative advances in photocatalyst heterojunction designs (including p-n junctions, S-scheme, Z-scheme, and type-ІІ heterojunctions), photocatalyst composition and function designs (such as preparing rare earth element doped upconversion photocatalysts, rare earth upconversion photocatalytic hybrids and triplet-triplet annihilation upconversion photocatalytic composites), and photothermal-photocatalytic bifunction designs for NIR light utilization are exclusively scrutinized.