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Graphene quantum dots (GQDs) are carbon‐based zero‐dimensional materials that have received considerable scientific interest due to their exceptional optical, electrical, and optoelectrical properties. Their unique electronic band structures, influenced by quantum confinement and edge effects, differentiate the physical and optical characteristics of GQDs from other carbon nanostructures. Additionally,...
The development of fabrication technologies and appearance of new materials has resulted in dramatic increase in the performance of electronic devices, while the overall size has decreased. Recent electronic devices made of micro/nano‐size components show high efficiency and outstanding performance with compact size, but these devices have revealed several fatal problems. In particular, the isolated...
Development of efficient surface passivation methods for semiconductor devices is crucial to counter the degradation in their electrical performance owing to scattering or trapping of carriers in the channels induced by molecular adsorption from the ambient environment. However, conventional dielectric deposition involves the formation of additional interfacial defects associated with broken covalent...
Porous Piezoelectric Fibers
In article number 2105811, Miso Kim and co‐workers establish a distinctive design approach to enhance piezoelectric performance via structural morphology tailoring in piezoelectric polymer fibers. Providing water molecules under ambient humidity conditions during electrospinning is the most crucial consideration in this study.
Electrospun polymeric piezoelectric fibers have a considerable potential for shape‐adaptive mechanical energy harvesting and self‐powered sensing in biomedical, wearable, and industrial applications. However, their unsatisfactory piezoelectric performance remains an issue to be overcome. While strategies for increasing the crystallinity of electroactive β phases have thus far been the major focus...
In article number 1905000, Jae‐Hyun Lee, Taesung Kim, and co‐workers demonstrate a uniform and stable 1T phase of WS2 (1T‐WS2) film on 4‐inch wafer using a plasma‐enhanced chemical vapor deposition system. The nanocrystalline 1T‐WS2, containing high density of grain boundary, is utilized as an electrocatalyst for the hydrogen evolution reaction and exhibits efficient catalytic activity and high durability...
The metallic 1T phase of WS2 (1T‐WS2), which boosts the charge transfer between the electron source and active edge sites, can be used as an efficient electrocatalyst for the hydrogen evolution reaction (HER). As the semiconductor 2H phase of WS2 (2H‐WS2) is inherently stable, methods for synthesizing 1T‐WS2 are limited and complicated. Herein, a uniform wafer‐scale 1T‐WS2 film is prepared using a...
Although carbon nanotubes (CNTs) are remarkable materials with many exceptional characteristics, their poor chemical functionality limits their potential applications. Herein, a strategy is proposed for functionalizing CNTs, which can be achieved with any functional group (FG) without degrading their intrinsic structure by using a deoxyribonucleic acid (DNA)‐binding peptide (DBP) anchor. By employing...
In article number 1803411, Hoon Eui Jeong and co‐workers develop a high‐performance flexible electronic skin by incorporating a piezoresistive carbon nanotube composite into a hierarchical topography of micropillar–wrinkle hybrid architectures. The hybrid architectures‐based electronic skin exhibits versatile and superior sensing performance.
Low‐dimensional nanomaterials are widely adopted as active sensing elements for electronic skins. When the nanomaterials are integrated with microscale architectures, the performance of the electronic skin is significantly altered. Here, it is shown that a high‐performance flexible and stretchable electronic skin can be produced by incorporating a piezoresistive carbon nanotube composite into a hierarchical...
New options in the material context of transient electronics are essential to create or expand potential applications and to progress in the face of technological challenges. A soft, transparent, and cost‐effective polymer of levan polysaccharide that is capable of complete, programmable dissolution is described when immersed in water and implanted in an animal model. The results include chemical...
In article number 1601926, K. Jo, J. H. Lee, and co‐workers demonstrate a novel approach to synthesize smooth and continuous DNA nanowires, preserving the original structure of large DNA and allowing its analysis with scanning electron microscope. Gold nanoparticles densely assembled on DNA via DNA binding peptides work as seeds for the metallization of DNA. This method allows analysis of whole DNA...
Synthesis of smooth and continuous DNA nanowires, preserving the original structure of native DNA, and allowing its analysis by scanning electron microscope (SEM), is demonstrated. Gold nanoparticles densely assembled on the DNA backbone via thiol‐tagged DNA binding peptides work as seeds for metallization of DNA. This method allows whole analysis of DNA molecules with entangled 3D features.
Seasonal emerging infectious diseases such as influenza A impose substantial risk and need new translational strategies to achieve active immunomodulation. Here, a novel injectable pathogen‐mimicking hydrogel (iPMH) that can enhance both cellular and humoral immune responses is suggested. By the help of poly(γ‐glutamic acid) that has abundant carboxylate groups and dispersion helper function, hydrophobic...
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