The application of deep ultraviolet detection (DUV) in military and civil fields has increasingly attracted the attention researchers’ attention. Compared with disadvantages organic materials, such as complex molecular structure poor stability, inorganic materials are widely used field DUV because their good controllable growth, other characteristics. Rapid advances preparing high-quality ultrawide-bandgap (UWBG) semiconductors have enabled realization various high-performance photodetectors...

Abstract Hexagonal boron nitride (hBN) is one of the most promising candidates for vacuum‐ultraviolet photodetectors (VUV PDs). However, efficient and low‐cost fabrication large‐area hBN‐PDs still encounters challenges. Herein, a cost‐effective route proposed fast scalable high‐performance VUV PDs via hBN nanosheet (BNNS) films. BNNSs are peeled from bulk self‐assembled into ordered In such PDs, junction barriers present at contact interfaces give “light‐induced reduction barrier height”...

An ultrahigh-frequency (UHF) miniaturized metamaterial absorber (MMA) using incurved square loop loaded with lumped resistors is proposed in this letter. The size of the unit cell to be only 20 × mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , about 0.0036λ at center frequency (910 MHz), which a quarter conventional UHF cell. Detailed simulations and experimental results show that MMA covers worldwide radio identification (RFID)...

Ingenious microstructure design and appropriate multicomponent strategies are still challenging for advanced electromagnetic interference (EMI) shielding materials with excellent effectiveness (SE) reliable mechanical properties in harsh environments low filling levels. In this study, nickel@multiwalled carbon nanotubes/alumina (Ni@CNTs/Al2O3) ceramic composites segregated structures electric/magnetic-coupling networks anchored by CNTs magnetic Ni nanofillers were prepared hot-press...

Rate equations and numerical simulations relying on complex mathematical physical principles are typically used to model directly modulated lasers (DMLs) but have difficulty simulating dynamic DML behavior in real-time under varying conditions due their high complexity. Here, we introduce a data-driven deep learning method DMLs, aiming achieve accuracy with reduced computational This approach employs bidirectional long short-term memory (BiLSTM) enhanced by advanced feature recalibration...

Abstract A series of alumina composite ceramics with a brick‐and‐mortar structure were successfully prepared by coating different contents ZrO 2 and sol on Al O 3 microspheres hot pressing. By changing the process parameters, influence pressing mechanical properties material was explored. The synergistic effect toughening, phase transformation self‐toughening improves ceramics. samples coated achieved best performance when pressure is 30 MPa temperature 1540°C, fracture toughness 7.4 MPa·m...

Abstract A hexagonal boron nitride (hBN) based p‐n homo‐junction is expected to demonstrate a great potential for being fabricated into an emitter (either light‐emitting diode or laser diode) in the deep‐UV spectral region. However, it remains challenge achieve n‐type conductive hBN. Herein, hBN obtained by means of doping sulfur The structure and electric properties S‐doped studied via density functional theory, indicating that orbital coupling between S 3p B 2p introduces shallow donor...

Due to increasing human engineering activities in cold regions, the precise measurement of frozen soil’s physical property parameters has become particularly important. Traditional measurements thermal conductivity and unfrozen water content soil are usually tested separately, leading errors accurately understanding dynamic variation law permafrost’s hydrothermal near-phase transition zone. To address this, a multi-sensor fusion technology–thermo time domain reflectometry (thermo-TDR) sensor...

A tungsten disulfide film with a hierarchical structure is synthesized by surface-assisted chemical vapor transport method and applied as self-supported electrode for the hydrogen evolution reaction, showing superior electrocatalytic performance.

Abstract A film stripping method that allows for liquid phase exfoliation assisted by spin coating polymethyl methacrylate has been investigated, resulting in a two‐inch hexagonal boron nitride (hBN) to be fully stripped and then transferred. number of key factors can influence the transferring process films grown sputtering have systematically analyzed, including different solutions, concentration solution thickness films. The morphology properties hBN before after characterized. band edge...

Hexagonal boron nitride (h-BN) exhibits a dangling bond-free layered structure and ultrawide band gap, which is apt to integrate with other semiconductors form heterojunction. Particularly, heterojunction the main impetus for h-BN broaden horizon on deep ultraviolet optoelectronic photovoltaic applications. Here, series of h-BN/B1-xAlxN heterojunctions different Al components were fabricated by radio frequency (RF) magnetron sputtering. The performance was measured via I-V characteristic...

Hexagonal boron nitride (hBN) as an ultrawide bandgap semiconductor has great potential for being fabricated into optoelectronics used in the deep ultraviolet (DUV) spectral region. A high-crystallinity hBN film been achieved on a catalyst-free sapphire substrate by using LPCVD technique, where nitridation process plays key role obtaining high-quality featuring suppressive N-vacancy. Such epitaxial shown initially flat surface with trench topography, then evolves to honeycomb-corrugated...

BAlN is a promising ultrawide bandgap semiconductor, but systematic studies of its are scarce. Here, engineering containing the phase transition factor (from hexagonal to wurtzite structures) has been investigated by DFT calculations and verified experimentally. The calculated bowing parameter (h-BAlN) 2.29 eV, while parameters (w-BAlN) −4.09 eV 2.48 in B-rich Al-rich regions, respectively. Meanwhile, indicate that preferentially forms w-BAlN at Al composition above 18.7%. So, variation...

Abstract Zinc oxide (ZnO) is one of the most attractive materials for preparation ultraviolet photodetectors (UV PDs). However, high leakage current and slow response speed significantly limit practical applications ZnO-based PDs. In this study, fabrication UV PDs based on self-assembled ZnO film has been proposed. The device an ultra-low dark (25 pA@10 V) exhibits fast (190 ms/68.6 ms) detectivity (1.91 × 10 14 Jones) 360 nm light. performance can be attributed to operating mechanism...

The hexagonal boron nitride (hBN) and BAlN films were prepared by RF-sputtering, which used as the low high refractive index layers. A series of hBN/BAlN distributed Bragg reflectors (DBRs) on sapphire substrate. reflectivity 9-pair (39 nm/33 nm) DBR reached 90% at 300 nm with a bandwidth 45 nm, 6-pair (35 nm/29 52% 280 nm. DBRs can be to achieve higher in shorter UV bands improvement material quality through growth condition optimization.

Digestive ripening is introduced into the classical Lee–Meisel synthesis to obtain uniform and size-controllable Ag nanoparticles.

Abstract Polymer hydraulic fracturing is important for increasing production during petroleum exploitation. After fracturing, the high‐viscosity polymer should be completely decomposed by gel breakers (ammonium persulfate [APS]) to realize high conductivity in proppant pack. A new series of polyaniline microcapsules loaded with APS preparation delayed‐release were synthesized via situ polymerization. The silica nanoparticles doped control release encapsulated APS. morphology, shell wall...

Fe−doped hBN film has great potential for use in spintronic applications. The wafer scale preparation of films and their material properties are crucial application devices. In this work, with 2−inch were fabricated by magnetron co−sputtering, the characterized. crystal quality decreased, but electrical performance was greatly improved. average square resistance 0.34 KΩ/sqr. Meanwhile, kept characteristics well. wavelength absorption edge 216 nm, corresponding optical band gap 5.76 eV.

Strength and toughness are two vital contradictory properties, especially in alumina structural ceramics. This mutual exclusion limits the widespread application of advanced ceramics harsh environments. To deal with this issue, self‐toughening bulk without any ductile phase a unique combination excellent reliable strength by combining foam hot‐pressing sintering prepared. Foam honeycomb cellular structures prepared particle‐stabilized foaming. Then, is directly hot pressed sintered, which...