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Phase‐change random access memory represents a notable advancement in nonvolatile memory technology; however, it faces challenges in terms of thermal stability and reliability, hindering its broader application. To mitigate these issues, doping and structural modification techniques such as phase‐change heterostructures (PCH) are widely studied. Although doping typically enhances thermal stability,...
Nanomaterials like graphene and transition metal dichalcogenides are being explored for developing artificial photosensory synapses with low‐power optical plasticity and high retention time for practical nervous system implementation. However, few studies are conducted on Tellurium (Te)‐based nanomaterials due to their direct and small bandgaps. This paper reports the superior photo‐synaptic properties...
Layered 2D transition metal dichalcogenides (TMDs) have been suggested as efficient substitutes for Pt‐group metal electrocatalysts in the hydrogen evolution reaction (HER). However, poor catalytic activities in neutral and alkaline electrolytes considerably hinder their practical applications. Furthermore, the weak adhesion between TMDs and electrodes often impedes long‐term durability and thus requires...
Petal‐Like Nanostructures
In article number 2306324, Jae Hee Jung, Dong Yun Choi, and co‐workers present a facile method for evaporation‐induced self‐assembly, resulting in petal‐like nanostructures on fabric. These nanostructures offer both superhydrophobic‐driven antifouling and visible‐light‐driven antimicrobial activities for personal protective equipment. The combined effect leads to rapid and...
Although the personal protective equipment (PPE) used by healthcare workers (HCWs) effectively blocks hazardous substances and pathogens, it does not fully rule out the possibility of infection, as pathogens surviving on the fabric surface pose a substantial risk of cross‐infection through unintended means. Therefore, PPE materials that exhibit effective biocidal activity while minimizing contamination...
Flexible Tellurium Nanorope Films
In article number 2300557, Tae Geun Kim and co‐workers present hexagonal‐shaped, ultrathin and highly flexible Te and Te–metal nanorope arrays grown by low‐power radiofrequency (RF) sputtering. Blue organic light‐emitting diodes (OLEDs) with 7‐nm Te–W nanoropes as the anode exhibit significantly higher external quantum efficiencies, lower turn‐on voltages and superior...
Nanomaterials that can be easily processed into thin films are highly desirable for their wide range of applicability in electrical and optical devices. Currently, Te‐based 2D materials are of interest because of their superior electrical properties compared to transition metal dichalcogenide materials. However, the large‐scale manufacturing of these materials is challenging, impeding their commercialization...
Phase‐change random‐access memory is a promising non‐volatile memory technology. However repeated phase‐change operations can cause durability issues owing to defects formed by long‐distance atom diffusion. To mitigate these issues, phase‐change heterostructure (PCH) devices with confinement material (CM) layers based on transition metal dichalcogenides (TMDs) such as TiTe2 have been proposed. This...
Phase‐Change Heterostructure Memory
In article number 2303659, Tae Geun Kim and co‐workers present phase‐change heterostructure (PCH) memory devices that control vertical atomic diffusion during operation. The device performance, such as power consumption and thermal stability, is determined by the choice of transition metal dichalcogenide‐based confinement materials with different cohesive energies,...
Cancer immunotherapy is a promising therapy to treat cancer patients with minimal toxicity, but only a small fraction of patients responded to it as a monotherapy. In this study, a strategy to boost therapeutic efficacy by combining an immunotherapy based on ex vivo expanded tumor‐reactive T cells is devised, or adoptive cell therapy (ACT), with photothermal therapy (PTT). Smart gold nanoparticles...
Materials that undergo reversible changes in form typically require top‐down processing to program the microstructure of the material. As a result, it is difficult to program microscale, 3D shape‐morphing materials that undergo non‐uniaxial deformations. Here, a simple bottom‐up fabrication approach to prepare bending microactuators is described. Spontaneous self‐assembly of liquid crystal (LC) monomers...
Deoxyribonuclease‐I (DNase‐I), a representative endonuclease, is an important biomarker for the diagnosis of infectious diseases and cancer progression. However, enzymatic activity decreases rapidly ex vivo, which highlights the need for precise on‐site detection of DNase‐I. Here, a localized surface plasmon resonance (LSPR) biosensor that enables the simple and rapid detection of DNase‐I is reported...
4D bioprinting techniques that facilitate formation of shape‐changing scaffold‐free cell condensates with prescribed geometries have yet been demonstrated. Here, a simple 4D bioprinting approach is presented that enables formation of a shape‐morphing cell condensate‐laden bilayer system. The strategy produces scaffold‐free cell condensates which morph over time into predefined complex shapes. Cell...
Lithium–Sulfur Batteries
In article number 2200326, Kang‐Jun Baeg, Jun‐Woo Park, an co‐workers develop high‐energy‐density flexible lithium–sulfur (Li–S) batteries with high‐loading, free‐standing cathodes and chemically functionalized carbon mixture interlayers. The multimodal capturing effect via simultaneous physical trapping and strong chemical interactions is highly efficient for immobilizing...
The widespread adoption of Li‐ion batteries is currently limited by their unstable electrochemical performance and high flammability under mechanical deformation conditions and a relatively low energy density. Herein, high‐energy‐density lithium–sulfur (Li–S) batteries are developed for applications in next‐generation flexible electronics and electric vehicles with long cruising distances. Freestanding...
Macrophages (Mφs) are characterized by remarkable plasticity, an essential component of chronic inflammation. Thus, an appropriate and timely transition from proinflammatory (M1) to anti‐inflammatory (M2) Mφs during wound healing is vital to promoting resolution of acute inflammation and enhancing tissue repair. Herein, exosomes derived from M2‐Mφs (M2‐Exos), which contain putative key regulators...
Owing to the extraordinary properties, organic micro/nanocrystals are important building blocks for future low‐cost and high‐performance organic electronic devices. However, integrated device application of the organic micro/nanocrystals is hampered by the difficulty in high‐throughput, high‐precision patterning of the micro/nanocrystals. In this study, the authors demonstrate, for the first time,...
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