The vast compositional space available in high-entropy oxide semiconductors offers unique opportunities for electronic band structure engineering an unprecedented large room. In this work, with wide gap semiconductor lithium niobate (LiNbO3) as a model system, we show that the substitutional addition of metal cation mixtures within Nb sublattice can lead to formation single-phase solid solution featuring substantially narrowed and intense broadband visible light absorption. resulting LiNbO3...

Abstract Magneto‐mechano‐electric (MME) energy harvesters (EHs) have emerged as a promising solution for powering Internet of Things (IoT) sensor networks by capturing ambient stray magnetic fields in urban circumstance. Despite significant advancements, achieving milliwatt‐level power generation from extremely weak (<1 Oe) and randomly oriented remains challenging. Drawing inspiration the configuration cross‐shaped spider legs, this study introduces an innovative X‐shaped MME‐EH...

Phase transition in 2D MoS 2 is an important issue metal dichalcogenides. The mechanism of the phase investigated extensively, while a comprehensive understanding remains to be elusive. 2H 1T can induced by intercalation with alkali metals, associated transformation its electronic and structural orders. Here, using situ transmission electron microscopy, electrochemical sodiation processes nanosheets are investigated. This paper points out intermediate 2H‐Na 0.25 × √3 superstructure. occurs...

Among 2D/layered semiconductors, group IV monochalcogenides such as SnS(e) and GeS(e) have attracted attention phosphorene/black phosphorus analogues with anisotropic structures predicted unusual properties. In contrast to SnS, for which bottom-up synthesis has been reported, few-layer GeS realized primarily via exfoliation from bulk crystals. Here, we report the of large (up >20 μm), faceted single crystalline flakes properties using a vapor transport process. situ electron microscopy is...

<italic>In situ</italic> TEM studies unravel a mechanistically distinct two-stage discharge mechanism for graphite fluoride (CF_x) nanosheets upon electrochemical lithiation.

Isotopically purified semiconductors potentially dissipate heat better than their natural, isotopically mixed counterparts as they have higher thermal conductivity (κ). But the benefit is low for Si at room temperature, amounting to only ∼10% κ bulk ^{28}Si natural (^{nat}Si). We show that in stark contrast this behavior, (99.92% enriched) nanowires up 150% ^{nat}Si with similar diameters and surface morphology. Using a first-principles phonon dispersion model, giant isotope effect...

The vast majority of single crystalline metal nanoparticles adopt shapes in the Oh point group as a consequence symmetry underlying face-centered cubic (FCC) crystal lattice. Tetrahedra are notable exception to this rule, and although they have been observed several syntheses, their growth mechanism, symmetry-reduction process that necessarily characterizes it, is poorly understood. Here, breaking mechanism revealed by situ liquid flow cell transmission electron microscopy (TEM) observation...

Twisted stacking of van der Waals materials with moiré superlattices offers a new way to tailor their physical properties via engineering the crystal symmetry. Unlike well-studied twisted bilayers, little is known about overall symmetry and symmetry-driven continuously supertwisted multilayer structures. Here, using polarization-resolved second harmonic generation (SHG) microscopy, we report threefold (

Abstract An in‐depth mechanistic understanding of the electrochemical lithiation process tungsten oxide (WO 3 ) is both fundamental interest and relevant for potential applications. One most important features WO formation chemically flexible, nonstoichiometric Li x , known as bronze. Herein, we achieved real‐time observation deep single‐crystal nanowires by constructing in situ transmission electron microscopy (TEM) cells. As revealed nanoscale imaging, diffraction, spectroscopy, it shown...

The light-stimulated transformation of ensembles spherical nanoparticles into anisotropic metal nanostructures mediated by localized surface plasmon resonance (LSPR) excitation is an elegant way synthesizing triangular silver nanoprisms with extraordinary control over size and shape. Generally, the occurs in oxidizing environments along a pathway that involves oxidative etching small preexisting Ag seeds, followed plasmon-mediated reduction resulting ions Ag0 incorporation nanocrystals....

The dynamic process of oxygen vacancy migration driven by the external electric field is directly observed at atomic scale in cerium oxides (CeO2) thin film in-situ transmission electron microscopy method. When a bias voltage proper value applied across CeO2 film, vacancies are formed near interface CeO2/anode, followed their along direction field. structural modulation occurs [110] zone axis due to ordering vacancies. results reversible transformation, i.e., releasing and storing processes...

The phase transition from monoclinic WO3 to cubic LixWO3 during lithiation of is one the key features for tungsten oxide as most used electrochromic material. Conventionally, lithium intercalation has been studied by building generic layered device combining with structural characterization and electrochemistry measurement at macro scale. In-situ transmission electron microscopy (in-situ TEM) proposed a method revealing detailed mechanism structural, physical, chemical properties. Here, we...

Abstract The dynamic lithiation processes of CuO nanowires were studied by the construction an electrochemical reaction cell inside a transmission electron microscope (TEM), where morphology evolution and phase transformation during have been recorded in real time situ TEM imaging, selected area diffraction (SAED) patterning energy loss spectroscopy (EELS). lithiated length ( L ) corresponding t measured to investigate kinetics. Based on relationship between it is found that two routes occur...

Long non-coding RNA small nucleolar host gene 16 (lncRNA SNHG16) is involved in the pathogenesis of acute ischemic stroke (AIS) through regulation brain endothelial cell viability, inflammation, atherosclerotic plaque formation, and neural apoptosis. This study aimed to evaluate prognostic value lncRNA SNHG16 AIS patients. Newly diagnosed patients (N = 120) were serially recruited. Their expressions peripheral blood mononuclear cells (PBMCs) detected by reverse transcription-quantitative...

Abstract An in‐depth mechanistic understanding of the electrochemical lithiation process tungsten oxide (WO 3 ) is both fundamental interest and relevant for potential applications. One most important features WO formation chemically flexible, nonstoichiometric Li x , known as bronze. Herein, we achieved real‐time observation deep single‐crystal nanowires by constructing in situ transmission electron microscopy (TEM) cells. As revealed nanoscale imaging, diffraction, spectroscopy, it shown...

Abstract As the lightest solid element and also simplest metal, lithium (Li) is one of best representations quasi‐free electron model in both bulk form reduced dimensions. Herein, controlled growth 2D ultrathin Li nanosheets demonstrated by utilizing an situ electrochemical platform built inside transmission microscope (TEM). The as‐grown freestanding have strong structure‐anisotropy with large lateral dimensions up to several hundreds nanometers thickness limited just a few nanometers....

The optical second harmonic generation (SHG) efficiency of hexagonal boron nitride (h-BN) layered materials is profoundly influenced by the symmetry properties, which has severely limited usefulness their SHG for nonlinear applications. Herein, we report on controlled growth large-area and continuous ultrathin h-BN films with a high density exposed edges that show strongly enhanced SHG, owing to breaking inversion occurring naturally at edge sites. edge-enriched BN was accomplished through...

Abstract An improved mechanistic understanding of the redox behavior ceria (CeO 2 ) is central to controlling its catalytic and ionic properties, which are involved in a variety technologically important applications. Here, as enabled by real‐time temporal resolution situ electron microscopy, we present strong evidence help elucidate complex interplay dynamics electrically driven equilibria ceria. Under an external electric field, CeO film sandwiched between Nb‐doped SrTiO 3 substrate...

As a typical immiscible binary system, copper (Cu) and lithium (Li) show no alloying chemical intermixing under normal circumstances. A notable example that takes advantages of the immiscibility between Cu Li is widespread utilization foils as anodic current collector in Li-ion batteries. Here we nanoscale size effect can play subtle yet critical role mediating activity therefore its miscibility with Li, such electrochemical solid-state amorphization will occur an system when decreasing...

Lithium (Li) is the simplest metal and lightest solid element. Here we report first demonstration of controlled growth two-dimensional (2D) ultrathin Li nanosheets with large lateral dimensions up to several hundreds nanometres thickness limited just a few by in-situ transmission electron microscopy (TEM). The nanoscale dynamics were unravelled real-time TEM imaging, which, in combination density function theory (DFT) calculations indicates that bcc structured into 2D consequence kinetic...