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Metamaterial - Europe PMC

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Last Updated: 15 May 2022

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Using adsorption kinetics to assemble vertically aligned nanorods at liquid interfaces for metamaterial applications.

The aim of this paper is to demonstrate vertically aligned nanorod arrays that solve these challenges by using cylindrical nanorods' adsorption kinetics at a liquid interface as a novel technique for fabricating vertically aligned nanorod arrays that solve these problems. More specifically, we model the particle's adsorption kinetics using Langevin dynamics coupled to a finite element model, accurately representing the deformation of the liquid meniscus and particle friction coefficients during adsorption. When nanorods approach the liquid interface from the bulk phase that is more energetically appropriate, we find that the final orientation of the cylindrical nanorod is determined by their initial attack angle as they approach the liquid interface, and that the range of attack angles leading to the end-on state is increased. Our kinetic assembly process is suitable to nanorods with a variety of lengths, aspect ratios, and materials, and so provides a cost-effective, low-cost, and robust platform for fabricating vertically aligned nanorods for metamaterial applications.

Source link: https://europepmc.org/article/MED/35467675


Gap coupled symmetric split ring resonator based near zero index ENG metamaterial for gain improvement of monopole antenna.

One side of the copper resonator is printed on an FR4 substrate, with the copper resonator at one end, with two square rings and one circular split ring. The two square rings are attached together around the outer ring's split gap, whereas two split semicircles are also attached together near the split gaps. Hence, a varying array of unit cells gives a similar reaction to the unit cell as compared to numerical simulation in CST microwave studio and verified by measurement. Circuit validation is carried out by comparing S 21 obtained in ADS to the same as CST, and the same circuit is constructed for the new MTM unit cell in Advanced Design System software. A test antenna is constructed to record the MTM's reaction over it.

Source link: https://europepmc.org/article/MED/35523812


Stacked Plasmonic Metamaterial with Strong Localized Electric Field Enables Highly Efficient Broadband Light-Driven CO 2 Hydrogenation.

The success of CO2 photoconversion is largely determined by light usage, although most of the materials used in such an application are limited to a narrow spectral absorption range. Plasmonic metamaterials with a predictable regular pattern and simple tunability are excellent candidates for increasing light absorption and producing large hot electrons and thermal energy. Herein, we present a model by coupling An atomic metamaterial with single Cu atoms in alloy as light absorber and catalytic sites respectively for gas-phase light-driven catalytic CO 2 hydrogenation.

Source link: https://europepmc.org/article/MED/35522089


Metamaterial sensor based on rectangular enclosed adjacent triple circle split ring resonator with good quality factor for microwave sensing application.

Both theoretically and experimentally, the success of the designed sensor system has been studied, and it's proven that it's effective. The results of this study were more informative than those of previous liquid sensing experiments. In both frequency shifting and amplitude changes, the suggested metamaterial sensor has a high quality factor and sensitivity. 90 MHz between olive and corn oils, 70 MHz between sunflower and palm oils, 80 MHz between clean and waste brake fluids, and 90 MHz between benzene and carbon-tetrachloride chemicals, a sample. In addition, the planned sensor can help distinguish different liquids by using the frequency shift function. The research was carried out in three stages: dielectric constant measurements with the N1500A dielectric measurement kit, simulation of the building, and an experimental test using the vector network analyzer.

Source link: https://europepmc.org/article/MED/35474227


Ultra-thin Optically Transparent Broadband Microwave Metamaterial Absorber Based on Indium Tin oxide

Between a periodic arrayed indium tin oxide film and a low-resistivity ITO reflective layer, the proposed MMA with high optical transmittance polymethyl methacrylate polymethyl methacrylate polyacrylate has been a popular MMA with high optical transmission polymethacrylate polyacrylate. The excellent microwave absorption and optical transmission properties of the modeled MMA show that the intended MMA has a strong potential for designing optical transmittance microwave absorption windows and units.

Source link: https://europepmc.org/article/PPR/PPR484885


High-FOM Temperature Sensing Based on Hg-EIT-Like Liquid Metamaterial Unit.

Temperature sensing with high-performance thermo sensing is a common component of modern Internet of Things. This paper develops and experimentally investigates an Hg-EIT-like metamaterial unit block for high figure-of-merit temperature senssing applications by combining the high-quality factor feature of a EIT-like metamaterial unit and the large temperature-sensing sensitivity of liquid metals.

Source link: https://europepmc.org/article/MED/35564104


A Flexible Terahertz Metamaterial Biosensor for Cancer Cell Growth and Migration Detection.

Consequently, a flexible terahertz metamaterial biosensor based on parylene C substrate was developed for label-free and non-destructive detection of breast cancer cell growth and migration. MDA-MB-231, the breast cancer cell culture, was cultured onto the surface of the metamaterial biosensor for 72 hours with a custom polydiloxane barrier sheet applied to measure the cell growth rate, which was measured as 14. 9 m/h. In addition, the cell migration showed that the transform growth factor-- promoted the cancer cell migration.

Source link: https://europepmc.org/article/MED/35457933

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions