Co3O4 nanotubes, nanorods, and nanoparticles are used as the anode materials of lithium-ion batteries. The results show that nanotubes prepared by a porous-alumina-template method display high discharge capacity superior cycling reversibility. Furthermore, exhibit excellent sensitivity to hydrogen alcohol, owing their hollow, nanostructured character.

We report a one-pot chemical approach for the synthesis of highly monodisperse colloidal nanophosphors displaying bright upconversion luminescence under 980 nm excitation. This general method optimizes with initial heating rates up to 100 °C/minute generating rich family nanoscale building blocks distinct morphologies (spheres, rods, hexagonal prisms, and plates) emission tunable through choice rare earth dopants. Furthermore, we employ an interfacial assembly strategy organize these...

Intrinsically high mobility and large absorption coefficient endow inorganic halide perovskites (IHPs) with great promise for high-performance photodetectors (PDs), which, however, are being hindered by the low carrier extraction transport efficiency of solution assembled films. Here, we report on a general strategy to enhance perovskite film conductivity that carbon nanotubes (CNTs) conductive nanonets constructed from provide fast tracks. Resultantly, CsPbBr3 nanosheet/CNT composite films...

We report on the synthesis, characterization, and electrochemical lithium intercalation of α-CuV2O6 nanowires, mesowires, microrods that were prepared through a facile hydrothermal route. The diameters as-synthesized about 100 nm, 400 1 µm, respectively. It was found by simply controlling reaction parameters, such as reagent concentration dwell time, transformation to nanowires readily achieved via "ripening−splitting" mechanism. Electrochemical measurements revealed as-prepared mesowires...

Strong light-matter coupling manifested by Rabi splitting has attracted tremendous attention due to its fundamental importance in cavity quantum-electrodynamics research and great potentials quantum information applications. A prerequisite for practical applications of the strong future optoelectronic devices is an all-solid-state system exhibiting room-temperature with active control. Here we realized such a heterostructure consisted monolayer WS2 individual plasmonic gold nanorod. By...

The electrical and photosensitive characteristics of amorphous indium-gallium-zinc-oxide (a-IGZO) thin-film transistors (TFTs) related to the oxygen vacancies V̈ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">O</sub> are discussed. With filling ratio from 14 8, electron density a-IGZO channel decreases 7.5 3.8 ( ×10 <sup xmlns:xlink="http://www.w3.org/1999/xlink">16</sup> cm xmlns:xlink="http://www.w3.org/1999/xlink">-3</sup> ); saturation...

ZnO nanowire inorganic/organic hybrid ultraviolet (UV) light-emitting diodes (LEDs) have attracted considerable attention as they not only combine the high flexibility of polymers with structural and chemical stability inorganic nanostructures but also a higher light extraction efficiency than thin film structures. However, up to date, external quantum UV LED based on has been limited by lack efficient methods achieve balance between electron contributed current hole that reduces...

Medical X-ray computed tomography requires imaging at a low dose rate and in large area. Halide perovskites have shown high potential for detection, but pressing challenge is the current lack of low-cost methods large-scale fabrication high-quality thick perovskite films. Here we demonstrate elucidate an aerosol-liquid-solid process to enable continuous growth uniform halide films temperature over area 100 cm2, which are vertically monolithic, thus beneficial carrier transport....

Abstract Flexible gas sensors play an indispensable role in diverse applications spanning from environmental monitoring to portable medical electronics. Full wearable system requires the collaborative support of high‐performance and miniaturized circuit module, whereas realization low power consumption sustainable measurement is challenging. Here, a self‐powered reusable all‐in‐one NO 2 sensor proposed by structurally functionally coupling battery, with ultrahigh sensitivity (1.92%/ppb),...

Well‐aligned nanowire arrays of Mo and its oxides have been synthesized. MoO 2 are first synthesized by thermal evaporation in a vacuum chamber. With further treatments the growth chamber, above can be turned into 3 or metallic (see Figure). The field emission properties these nanowires fully investigated.

Bunches of needle-shaped silicon carbide (SiC) nanowires were grown from commercially available SiC powders in thermal evaporation process and using iron as catalyst. Their structure chemical composition studied by Raman spectroscopy high-resolution transmission electron microscopy. The powder these may be easily dispersed, was used to form samples field emitters. needle shape individual is well-suited emission. Stable emission with current density 30.8 mA/cm2 observed at fields low 9.6...

Large-area, quasialigned nanotips of tungsten oxide have been grown by a two-step high-temperature, catalyst-free, physical evaporation deposition process. The are single crystalline with growth direction [010]. exhibit excellent field-emission properties low threshold field (for an emission current density 10mA∕cm2) ∼4.37MV∕m and uniform from the entire arrays, as well high time stability. These results make nanotip arrays competitive candidate for displays.

Straight crystalline copper sulphide (Cu2S) nanowire arrays have been grown by using a simple gas–solid reaction at room temperature. These were demonstrated to exhibit semiconductor properties. Field emission was observed field of ∼6 MV/m, and its current-field characteristics deviate from Fowler–Nordheim theory, i.e., showing nonlinear plot. The uniform the whole transparent anode technique, their variation with applied recorded. individual nanowires also studied microscope, found consist...

Boron nanotubes (BNTs) have been theoretically proposed to metallic properties whether they are in armchair or zigzag structure, so attracted much interest from researchers. However, their real not understood until now because hard synthesize. In this paper, we successfully fabricated a large quantity of boron nanotubes, which may provide way master electric and field emission (FE) properties. Study on individual shows that BNTs with an averaged conductivity 40 Ω−1cm−1. Moreover, can sustain...

Abstract Four new quaterthiophene derivatives with end‐groups composed of dicyclohexyl ethyl (DCE4T), butyl (DCB4T), cyclohexyl (CE4T), and (CB4T) were designed. All materials showed high solubility in common organic solvents. UV–vis absorption measurements that the asymmetrically substituted (CE4T CB4T) preferred H‐type aggregation whereas those symmetrically (DCE4T DCB4T) J‐type aggregation. The molecular structure‐dependent packing (H or J) was analyzed by grazing‐incidence wide‐angle...

Magnetically separable MnFe2O4 was prepared successfully by a sol–gel combustion method. The synthesized characterized X-ray diffraction (XRD), scanning electronic microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area, zeta potential, and magnetic hysteresis loops. catalytic activity of evaluated the ozonation 4-chlorophenol (4-CP) at different solution pH value, ozone gas concentration, dosage, initial 4-CP concentration. consumption monitored ·OH exposure calculated in processes. It...

A chemical vapor deposition method is developed for thickness-controlled (one to four layers), uniform, and continuous films of both defective gallium(II) sulfide (GaS): GaS0.87 stoichiometric GaS. The unique degradation mechanism with X-ray photoelectron spectroscopy annular dark-field scanning transmission electron microscopy studied, it found that the poor stability weak optical signal from GaS are strongly related photo-induced oxidation at defects. An enhanced demonstrated under laser...

Tomographic image reconstruction with deep learning is an emerging field of applied artificial intelligence. Reducing radiation dose sparse views’ a significant task in cardiac imaging. Many efforts are contributing to sparse-view tomography imaging, but it still challenge for achieving good images from high level, such as 60 views. In this study, we proposed Deep Embedding-Attention-Refinement (DEAR) network fundamentally address challenge. DEAR consists three modules including embedding,...

Photoacoustic tomography (PAT), also known as optoacoustic tomography, is an attractive imaging modality that provides optical contrast with acoustic resolutions. Recent progress in the applications of PAT largely relies on development and employment ultrasound sensor arrays many elements. Although on-chip sensors have been demonstrated high sensitivity, large bandwidth, small size, rarely reported. In this work, we demonstrate a chalcogenide-based micro-ring array containing 15 elements,...

The ultrasensitive recognition of biomarkers plays a crucial role in the precise diagnosis diseases. Graphene-based field-effect transistors (GFET) are considered most promising devices among next generation biosensors. GFET biosensors possess distinct advantages, including label-free, ease integration and operation, ability to directly detect liquid environments. This review summarized recent advances for biomarker detection, with focus on interface functionalization. Various...

Abstract Wide color gamut and high resolution are becoming key features of the new generation displays, hence quantum dots pixels with luminescence purity have been placed great expectations. However, how to facilely rapidly fabricate electroluminescent both per inch (PPI) efficiency has a challenge. Here, one‐step, mask‐free, rapid laser writing strategy ultra‐high perovskite (PQDs) is presented. It found that laser‐induced reaction can convert PQDs into oxide, forming perovskite@oxide...