Borophene: New Sensation in Flatland

Borophene is considered as one of the most promising 2D nanomaterials, owing to its unique structural and electronic properties. The various synthetic approaches for the fabrication of borophene nanostructures with different phases and morphologies, including free‐standing borophene sheets, are described. The frontline applications of these nanostructures...

1h

Quantum Point Defects for Solid‐State Laser Refrigeration

The role of point defects in realizing solid‐state laser refrigeration is discussed with an emphasis on the fundamental physical phenomena and quantized electronic transitions. Lanthanide‐doping‐based point defects, which have advanced solid‐state laser refrigeration, along with potential color centers based on fluoride vacancies and color centers in...

1h

Ultrathin Low‐Crystallinity MOF Membranes Fabricated by Interface Layer Polarization Induction

Ultrathin, low‐crystallinity‐state metal‐organic framework (LC‐MOF) membranes are realized by interface layer polarization induction using an interface layer having metal ions with dense and uniform distribution, resulting in the creation of abundant open metal sites. Three types of LC‐MOF membranes are fabricated, showing unprecedented propylene permeance...

1h

Active Site Engineering in Porous Electrocatalysts

Porous electrocatalysts are the most popular class of materials that can provide a large density of accessible active sites and efficient mass transport. Representative progress of active site engineering in porous electrocatalysts for efficient electrocatalysis of hydrogen evolution reaction, oxygen reduction reaction, CO2 reduction reaction, nitrogen...

1h

Dielectric Properties of Ultrathin CaF2 Ionic Crystals

Calcium fluoride (CaF2) is an attractive high‐k dielectric for 2D electronics because its surface is terminated with fluorine atoms, which leads to a defect‐free van der Waals interface with 2D materials. Ultrathin CaF2 ionic crystals (grown by molecular beam epitaxy at 250 ºC) are shown to exhibit outstanding dielectric performance (i.e., homogeneity,...

1h

Crystallized Monolayer Semiconductor for Ohmic Contact Resistance, High Intrinsic Gain, and High Current Density

Contact resistance and intrinsic gain are important performance indicators of organic field‐effect transistors. Staggered structure devices based on highly crystallized monolayer organic semiconductor provide outstanding contact, carrier mobility, and intrinsic gain. Organic 2D materials can potentially play an important role in next‐generation flexible...

1h

Chemical Bonding in Chalcogenides: The Concept of Multicenter Hyperbonding

The concept of multicenter (three‐center/four‐electron) hyperbonding is introduced to elucidate the unique properties of (telluride‐based) chalcogenides, in particular, used for phase‐change memory applications. The characteristic features of hyperbonding, induced by the stabilization interaction of a lone pair with an adjacent antibonding orbital,...

11h

Single‐Atom Catalysts Supported by Crystalline Porous Materials: Views from the Inside

Like a pearl in a crown, single‐atom catalysts supported with crystalline porous materials have recently attracted great interest in heterogeneous catalysis. This review presents research progress on these catalysts, mainly focusing on their atomic structure detection, electronic property analysis, and in‐situ catalytic studies using synchrotron X‐ray...

2d

Directly Grown Vertical Graphene Carpets as Janus Separators toward Stabilized Zn Metal Anodes

Directly grown vertical graphene carpet on one side of commercial glass fiber separator affords evenly distributed electric field, lowered local current density, and boosted zincophilic effect, thereby enabling a Janus separator toward stabilized Zn anode. Abstract Zinc metal anode has garnered a great deal of scientific and technological...

2d

Targeting Neutrophils for Enhanced Cancer Theranostics

A neutrophil targeting nanomedicine is developed to enhance tumor accumulation and improve therapeutic efficacy achieved via in situ cross‐linking catalyzed by endogenous myeloperoxidase. In combination with photodynamic therapy, lung metastasis is inhibited by blocking neutrophil recruitment into the lung through sustained release of a 5‐lipoxygenase...

2d