Transport of ionic solutions through graphene oxide (GO) membranes is a complicated issue because the complex and tortuous structure inside makes it very hard to clarify. Using molecular dynamics (MD) simulations, we investigated mechanism water transport ion movement across multilayer GO. The significant flow rate considerably influenced by structural parameters GO membranes. Because size effect on shrunken real area, there disagreement between classical continuum model nanoscaled flow. To...

Based on the synthetic aperture radar (SAR) geometric model, a novel, fast algorithm of large scene deceptive jamming against space-borne SAR is proposed. First, we divide template into sub-templates according to depth focus in range dimension. Next, each sub-template decomposed slow-time-dependent and slow-time-independent terms frequency-azimuth time domain. The are generated off-line while by real-time 1-D frequency modulation. Then, convolved with intercepted signals simultaneously....

A novel CPW-fed planar printed monopole antenna with broadband circular polarization (CP) characteristic is presented. The proposed consists of a rectangle patch and an improved ground-plane. By appropriately adding vertical stub cutting horizontal slit on the ground-plane, impedance bandwidth enlarged, its wide axial-ratio (AR) achieved. measured results show that has not only broad 3-dB AR 44.9% (2.65 GHz, 4.58-7.23 GHz) respect to CP center frequency 5.90 but also 10-dB return loss 76.9%...

Water transport inside graphene-based materials has drawn much attention nowadays because of its promising potential in ions filtration applications. Using molecular dynamics (MD) simulations, we investigated the mechanism water interlayer gallery between graphene oxide layers. The model slipped-Poiseuille flow was cited to depict characteristic flow. This significant rate related slip velocity water, which is constrained by hydrogen interactions molecules and hydroxyl groups. We find that...

2D anisotropic transport of photons/electrons is crucial for constructing ultracompact on-chip circuits. To date, the photons in organic crystals usually exhibit isotropic propagation, and behaviors have not yet been fully demonstrated. Now, an orientation-controlled photon-dipole interaction strategy was proposed to rationally realize photon two co-crystal polymorph microplates. The monoclinic microplate adopts a nearly horizontal transition dipole moment (TDM) orientation plane, exhibiting...

We put forward an optically transparent microwave absorber based on a conformal broadband metamaterial, which shows high angular stability. Our is double-layer sandwich structure mainly made of polyvinyl chloride sheets and indium tin oxide films. To achieve wideband absorption stability, impedance layer composed square spiral elements exploited to increase the bandwidth. A compensation then employed address mismatch between that free space at incidences. Experimental results show light...

A series of nano/submicrometer Ag particles with uniform size-distribution are prepared using ascorbic acid to reduce AgCl in aqueous solution and at ambient conditions. NaOH is used adjust the redox potential acid, polyvinylpyrrolidone (PVP) balance relative rates which various crystallographic planes grow. Under reaction conditions, nucleation growth steps separated, thus controlling anisotropic crystals. The products studied transmission electron microscopy (TEM), high-resolution TEM...

Electrochemical CO2 reduction to formate provides a prospective avenue produce more valuable products. Compared pure Bi and Cu, the Bi–Cu (2:1) bimetallic catalyst optimizes interfacial electronic structure through interaction between Cu. The exhibits high faradaic efficiency of 94.1% at −1.0 V vs RHE, (>90%) toward in wide potential window (500 mV), long-term stability 20 h. electrocatalytic mechanism is identified by combining situ FT-IR DFT calculations, which demonstrates that prefers be...

ABSTRACT The clinical application of conventional peptide drugs often is limited by their short in vivo half-life and potential immunogenicity. Frequent injection presents challenges to the treatment chronic diseases, such as HIV infection. We chemically modified a fusion inhibitor with 3-maleimidopropionic acid (MPA), which allows rapid irreversible conjugation serum albumin at 1:1 molar ratio. FB006M, an MPA modification 13th amino acid, rapidly formed conjugate upon intravenous injection,...

This paper focuses on the problem of maximizing minimum power gain in a wide main lobe for an array antenna. To obtain desired pattern, current literatures solve known as shaped beam pattern synthesis (SBPS) by setting expression cost function. The certain direction antenna is comprehensively decided radiated density and total power. Both these two parameters are affected selection elements' weights. However, SBPS-based methods do not take into account. Therefore, cannot directly, optimal...

Frequency selective rasorbers with wide passband have been investigated for the stealth of wideband antennas over past few years. However, degrades its in-band performance. Therefore, in this work, a switchable wide-passband rasorber, whose can be switched into absorption band, is proposed utilizing frequency-selective surface (FSS) and two resistive layers. First, second-order FSS presented design layer analyzed. Second, reactance variation low- <inline-formula...

Abstract Multi‐foci lenses are essential components for optical communications, virtual reality display and microscopy, yet the bulkiness of conventional counterparts has significantly hindered their widespread applications. Benefiting from unprecedented capability metasurfaces in light modulation, metalenses able to provide multi‐foci functionality with a more compact footprint. However, achieving imaging quality comparable that corresponding single‐foci at each focal point poses challenge...

In this letter, a frequency-scanning planar antenna composed of phase gradient metasurface and feed structure is proposed. The can couple the wave from into spatial radiated whose propagation direction manipulated by frequency as long provides similar electromagnetic field to that spoof surface plasmon polariton rather than exciting polariton. Both simulation measured results demonstrate works well in range 8.9 9.5 GHz, magnitude reflection coefficient maintains lower -10 dB with minimum...

A facile and universal approach to construct dodecaborate-based supramolecular organic frameworks (BOFs) decorated with ultrafine metal clusters.

Optically transparent microwave absorbers have been widely reported for electromagnetic stealth applications over the past few years, but developing ultra-wideband with high angular stability remains challenging. In this work, an absorber comprising a double-layer polymethylpentene (TPX) block and indium tin oxide (ITO) films has designed, fabricated, measured, respectively. Firstly, impedance layer novel coupled hexagonal combined elements is exploited to achieve absorption. Secondly,...

Switchable rasorber has attracted a great deal of interest in recent years due to its in-band shielding ability. In this work, methodology for designing switchable with high roll-off and polarization selection characteristics is proposed. The device can be switched between rasorber, selection, absorber modes, composed two resistive layers (a passive an active layer) frequency selective surface (FSS). Transmission zeros are introduced the FSS design improve characteristic transmission band....

Understanding the mechanism of water transport inside an interlayer between graphene-based plates has tremendous value for theoretical studies and industrial applications. The fluid flow confined in nano-scaled spaces experiences a slip velocity near wall, which is significantly different to that bulk water. Here we propose model combining classic hydrodynamics with kinetic theory depict dependency effect on oxide concentration valley plates. influence oxidized graphene comprehensive result...

Electrical resistance tomography (ERT) has been considered as a data collection and image reconstruction method in many multi-phase flow application areas due to its advantages of high speed, low cost being non-invasive. In order improve the quality reconstructed images, Total Variation algorithm attracts abundant attention ability solve large piecewise discontinuous conductivity distributions. industrial processing (IPT), techniques such ERT have used extract important measurement...

A microwave reflection measurement method is proposed to determine the dielectric constant of slabs without knowing their exact thickness. The expression derived according transmission line theory, in which loss material neglected. Error analysis for lossy has also been conducted. In-house results on commercial polymethyl methacrylate, polytetrafluoroethylene, and FR4 samples have presented validate method. Excellent agreement achieved between conventional free-space suitable...