MXenes, carbides, nitrides and carbonitrides of early transition metals are the new members two dimensional materials family given with a formula Xn. Recent advances in chemical exfoliation CVD growth these crystals together their promising performance electrochemical energy storage systems have triggered interest structures. In this work, we employ first principles calculations for n = 1 structures Sc, Ti, Zr, Mo Hf pristine MXenes fully surface terminated forms F O. We systematically...

We proposed and demonstrated metamaterial-based strain sensors that are highly sensitive to mechanical deformation. Their resonance frequency shift is correlated with the surface of our test material data reported telemetrically. These metamaterial better than traditional radio-frequency (rf) structures in sensing for providing resonances high quality factors large transmission dips. Using split ring resonators (SRRs), we achieve lower frequencies per unit area compared other rf structures,...

We proposed and demonstrated flexible metamaterial-based wireless strain sensors that include arrays of split ring resonators ͑SRRs͒ to telemetrically measure strain.For these metamaterial sensors, we showed a substrate ͑e.g., Kapton tape͒ delivers greater sensitivity more linear response as compared using silicon substrates.Specifically, tape-based SRR exhibit significantly improved level 0.292 MHz/kgf with substantially reduced nonlinearity error 3% for externally applied mechanical loads...

We designed, fabricated, and characterized metamaterial-based RF-microelectromechanical system (RF-MEMS) strain sensors that incorporate multiple split ring resonators (SRRs) in a compact nested architecture to measure telemetrically. also showed biocompatibility of these an animal model. With devices, our bioimplantable wireless metamaterial are intended, enable clinicians, quantitatively evaluate the progression long-bone fracture healing by monitoring on implantable fixation hardware real...

Electronic, vibrational, and thermodynamic properties of different graphyne structures, namely α-, β-, γ-, 6, 12-graphyne, are investigated through first principles-based quasi-harmonic approximation by using phonon dispersions predicted from density-functional perturbation theory. Similar to graphene, was shown exhibit a structure with extraordinary electronic features, mechanical hardness, thermal resistance, very high conductivity calculation methods. Hence, characterizing its vibrational...

MXenes combine distinctive properties, including high electrical conductivity, thermal and efficient absorption of electromagnetic waves, which allow them to be utilized in various applications such as energy storage, sensors, functional composites. This study aims grow thin large area Mo2C flakes a controlled manner by using chemical vapor deposition, avoiding surface functionalization, limited lateral dimensions. Herein, we investigate the effects CH4 flow, precursor/catalyst (Mo/Cu)...

Single-layer, large-scale two-dimensional material growth is still a challenge for their wide-range usage. Therefore, we carried out comprehensive study of monolayer MoS2 by CVD investigating the influence zone configuration and precursors ratio. We first compared two commonly used approaches regarding relative substrate precursor positions, namely, horizontal face-down configurations where approach found to be more favorable obtain larger flakes under identical conditions. Secondly,...

We present telemetric sensing of surface strains on different industrial materials using split-ring-resonator based metamaterials. For wireless strain sensing, we utilize metamaterial array architectures for high sensitivity and low nonlinearity-errors in sensing. In this work, measurements three test cast polyamide, derlin polyamide are performed by observing operating frequency shift under mechanical deformation these data compared with commercially-available wired gauges. demonstrate that...

Recently, two-dimensional monolayer molybdenum disulfide (MoS2), a transition metal dichalcogenide, has received considerable attention due to its direct bandgap, which does not exist in bulk form, enabling applications optoelectronics and also thanks enhanced catalytic activity allows it be used for energy harvesting. However, growth of controllable high-quality monolayers is still matter research the parameters determining mechanism are completely clear. In this work, chemical vapor...

The investigation of thermal transport properties novel two-dimensional materials is crucially important in order to assess their potential be used future technological applications, such as thermoelectric power generation.

A hybrid structure of the quasi-2D colloidal semiconductor quantum wells assembled with a single layer 2D transition metal dichalcogenides offers possibility highly strong dipole-to-dipole coupling, which may enable extraordinary levels efficiency in Förster resonance energy transfer (FRET). Here, we show ultrahigh-efficiency FRET from ensemble thin films CdSe/CdS nanoplatelets (NPLs) to MoS2 monolayer. From time-resolved fluorescence spectroscopy, observed suppression photoluminescence NPLs...

To generate white light using semiconductor nanocrystal (NC) quantum dots integrated on emitting diodes (LEDs), multiple hybrid device parameters (emission wavelengths of the NCs and excitation platform, order with different sizes, amount types NCs, etc) need to be carefully designed properly implemented. In this study, we introduce demonstrate LEDs based simple hybridization only a single type CdS dot nanoluminophores near-ultraviolet LEDs. Here present their design, synthesis-growth,...

One out of ten bone fractures does not heal properly due to improper load distribution and strain profiles during the healing process. To provide implantable tools for assessment fractures, we have designed novel, bio-implantable, passive, on-chip, RF-MEMS sensors that rely on resonance frequency shift with mechanical deformation. For this purpose, modeled, fabricated experimentally characterized two on-chip high quality factors in vivo implantation. has an area ∼0.12 mm2 a factor ∼60 other...

The structural stability of 2D transition metal dichalcogenide (TMD) formations is particular importance for their reliable device performance in nano‐electronics and opto‐electronics. Recent observations show that the CVD‐grown TMD monolayers are likely to encounter problems such as cracking or fracturing when they kept under ambient conditions. Here, two different growth configurations investigated a favorable geometry proposed, which also sheds light onto mechanism provides solution...

MXenes are a family of two-dimensional (2D) materials known for their exceptional properties, such as high electrical conductivity and mechanical strength. Typically, they obtained by the etching process from...

In this letter, we report on the fluorescence lifetime imaging and accompanying photoluminescence properties of a chemical vapour deposition (CVD) grown atomically thin material, MoS 2 . µ‐Raman, µ‐photoluminescence (PL) microscopy (FLIM) are utilized to probe individual flakes films. Usage these three techniques allows identification layers, grain boundaries, structural defects their relative effects PL spectra. Our investigation monolayer reveals clear increase from 0.3 ns 0.45 at edges...

Approximately 10% of the fractures do not heal properly because inability to monitor fracture healing. Standard radiography is capable discriminating whether bone healing occurring normally or aberrantly. We propose and develop an implantable wireless sensor that monitors strain on implanted hardware in real time telemetrically. This enables clinicians Here we present development demonstration metamaterial-based radio frequency (RF) micro-electro-mechanical system (MEMS) sensors for sensing...

We present the growth and optimization of ultralow loss Si-based Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> planar waveguides, which have a high potential to boost performance rare-earth ion doped waveguide devices operating at visible C-band wavelength ranges. The structures are grown using thermal atomic layer deposition. Systematic characterization obtained thin films is...