Abstract Graphene‐based heterostructure composite is a new type of advanced sensing material that includes composites graphene with noble metals/metal oxides/metal sulfides/polymers and organic ligands. Exerting the synergistic effect ligands way to design gas sensors for nitrogen‐containing species including NH 3 NO 2 solve problems such as poor stability, high working temperature, recovery, selectivity. Different fabrication methods graphene‐based are extensively studied, enabling massive...

Research has been conducted on solid oxide fuel cells (SOFCs) for their flexibility, modularity, high efficiency, and power density. However, the working temperature leads to deterioration of materials increased operating costs. Considering protonic conductivity low activation energy, proton conducting SOFC, i.e., ceramic cell (PCFC), at a temperature, wildly investigated. The PCFC is promising state-of-the-art electrochemical energy conversion system ecological energy; it characterized by...

Flexible piezoelectric nanogenerators (NGs) based on patterned growth of ZnO nanowires (PNWs) by the hydrothermal method are proposed for high-efficiency energy harvesting applications. The use PNWs in ZnO-based FPNGs results a significant improvement terms magnitude output currents up to 6 times when compared with pristine NW-based without mode. maximum current was measured be about 150 nA, which enough drive some micro/nanoelectronic devices. improved performance is mainly attributed mode...

In this work, MXene/NiO-composite-based formaldehyde (HCHO) sensing materials were successfully synthesized by an in situ precipitation method. The heterostructures between the MXene and NiO nanoparticles verified transmission electron microscopy (TEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS). HCHO performance of MXene/NiO-based chemiresistive-type sensors was investigated. Compared to pure materials, MXene/NiO-P2-based sensor gas at room temperature significantly enhanced...

The electrical conductivity of amorphous carbon/reduced graphene oxide(rGO)-wrapped Co₃O₄nanofibers prepared by the electrospinning process is for first time finely tuned creatively thermal-etching in a controlled O₂environment.

Au modified TiO2/In2O3 hollow nanospheres were synthesized by the hydrolysis method using carbon as a sacrificial template. Compared to pure In2O3, TiO2, and based sensors, Au/TiO2/In2O3 nanosphere-based chemiresistive-type sensor exhibited excellent sensing performances formaldehyde at room temperature under ultraviolet light (UV-LED) activation. The response of nanocomposite-based 1 ppm was about 5.6, which is higher than that In2O3 (1.6), TiO2 (2.1), (3.8). time recovery nanocomposite 18...

The development of flexible photodetectors is believed to have great potential for future optoelectronic applications, such as biomedical imaging and smart wearable systems. Here the work proposes a simple low‐cost approach integrating ZnO ultraviolet (UV) photodetector using polyester fabric platform first time. nanowires coated was prepared by low‐temperature hydrothermal approach. They measured performance in terms I–V characteristics time‐resolved photocurrent. results showed that...

Abstract:

In2O3@TiO2 core-shell nanocubes were successfully prepared via hydrothermal method and subsequent water bath method. The characterization results show that the size of nanocomposites is 250-350 nm. based sensor presents excellent sensing response to formaldehyde at ppb level. 1 ppm about 5.3 room temperature under UV activation, which three times higher than pure In2O3 sensor. response/recovery time are 24 s 52 s, respectively. involved chemical reactions activated by had been investigated...

In practical applications, the hydrophone array has element position errors, which seriously degrade performance of direction arrival estimation. We propose a (DOA) estimation method based on sparse Bayesian learning using existing errors to solve this problem. The error and angle grid parameters are introduced, prior distribution these two is determined. joint probability density function established by means model. At same time, unknown optimized iterated expectation maximum algorithm...

Abstract Electrochemical nitrate reduction to ammonia (NO 3 RR) has become an attractive alternative way for sustainable synthesis. The development of electrocatalysts with high activity, stability and Faradaic efficiency is important but challenge due the complex eight‐electron process. Herein, LaNi 0.2 Cu 0.8 O 2.77 (LNC) 2.53 (LNC−Ar) are demonstrated as towards NO RR surface reconstruction two catalysts was found have strong effect on catalytic performance. LNC−Ar shows a superior...

With the proportional reduction of MOSFET size, leakage-to-barrier (DIBL) effect leads to a more significant increase in tunneling current on gate, and appearance gate also seriously affects static characteristics device. In this paper, new theoretical model relationship between direct thickness oxide layer under DIBL is proposed for device with ultra-thin layer. On basis, are studied detail by using HSPICE, their working conditions quantitatively analyzed. The characteristic variation trend...

Accurate modeling of threshold voltage is necessary in the integrated circuit design strained silicon devices. Thoroughly researching factors that affect and establishing a more precise model, can provide essential theoretical support for design. By solving Poisson equation, this paper, we demonstrate comprehensive physical model Si NMOSFETs using gradual channel approximation theory quasi-two-dimensional analysis. The investigates effects such as short-channel, narrow-channel, non-uniform...

Carbon-encapsulated Co3O4 nanofiber composites with rGO were successfully fabricated by using the electrospinning technology.The morphology and resistance of samples can be controlled preparing condition.The as-electrospun carbon-Co3O4 based chemo resistive sensor all showed good sensitivity to different concentrations ammonia.Besides this, exhibited selectivity several potential interferents such as methanol, ethanol, formaldehyde, acetone, benzene, methylbenzene.Water did play an important...