Point defects in silicon carbide are rapidly becoming a platform of great interest for single photon generation, quantum sensing, and information science. Photonic crystal cavities (PCC) can serve as an efficient light-matter interface both to augment the defect emission aid studying defects' properties. In this work, we fabricate 1D nanobeam PCCs 4H-silicon with embedded vacancy centers. These used achieve Purcell enhancement two closely spaced zero-phonon lines (ZPL). Enhancements >80-fold...

In this paper, we present the design, fabrication, and characterization of a traveling-wave directional coupler modulator based on electro-optic polymer, which is able to provide both high linearity broad bandwidth. The realized by introducing Δβ -reversal technique in two-domain coupler. A electrode designed function with bandwidth-length product 302 GHz·cm , achieving low microwave loss, excellent impedance matching, velocity as well smooth electric-field profile transformation. 3-dB...

A series of zinc silylamido complexes bearing claw-type multidentate aminophenolate ligands, [LZnN(SiMe3)2] (L = –OAr1-CH2N[(CH2)nNR2]CH2Ar2, n 2 or 3; R Me Et (1a–3a, 5a, 7a and 8a); L –OC6H2-4,6-tBu2-2-CH2N[(CH2)2OMe]2 (9a)), have been synthesized via the reaction Zn[N(SiMe3)2]2 1 equiv. corresponding aminophenol. The with proligand L6H (2-{N-(2-methoxybenzyl)-N-[3-(N′,N′-dimethylamino)propyl]aminomethyl}-4-methyl-6-tritylphenol) resulted in formation bisphenolate complex 6 regardless...

Abstract Wide band gaps and large second harmonic generation (SHG) response are two crucial yet contradictory parameters for nonlinear optical (NLO) crystals. Herein, through exploring the influence of anion groups on structural crystallization dimension space group, a series new NLO Hg‐based chalcogenides A II HgM IV S 4 (A = Sr, Ba, M Si, Ge) with wide SHG responses have been successfully designed synthesized. The structures these compounds consist 2D [HgMS ] 2− (M Si layers composed...

The objective of this study is to establish a comprehensive multiscale modeling framework capable accurately predicting the nanostructure properties and proton conductivity Nafion® membranes under varying hydration levels, temperatures, chemical degradation conditions. Initially, we constructed Coarse-Grained Molecular Dynamics (CGMD) model simulate structural evolution in membranes, systematically incorporating membrane — novel aspect rarely explored prior studies. resulting CGMD-derived...

Copper catalysts on Fe-loaded ceria were studied for NO reduction by CO.

Significance Point defects with coupled photon-spin properties hold much interest as possible qubits for quantum information processes. The studies described here show that prolonged laser irradiation and thermal annealing can enhance the defect–cavity coupling of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mtext>V</mml:mtext> <mml:mtext>Si</mml:mtext> <mml:mo>−</mml:mo> </mml:msubsup> </mml:math> embedded in silicon carbide optical...

Dimethyl sulfone (DMSN or MSM) was prepared<italic>via</italic>efficient oxidation of dimethyl sulfoxide and used developed as an efficient, viscose, recyclable solvent for ligand-free CuI-catalyzed Heck, Suzuki, Sonogashira cross-coupling reactions.

A series of coal-based materials were prepared using a hydrothermal method combined with high-temperature CO2 activation. During sample preparation, K modification was performed to optimize the surface functional groups and pore structure. The NOx adsorption volume each evaluated in simulated flue gas atmosphere. physical chemical parameters samples characterized by X-ray diffraction, photoelectron spectroscopy, Raman temperature-programmed desorption NO. In addition, mechanism...

The catalytic partial oxidation of methane (CPOM) to methanol has been regarded as a promising approach for utilization, despite that the conversion remains formidable challenge in perspective catalysts. A novel catalyst system multi-wall carbon nanotubes (MWCNTs) supported Fe2O3 with existing I2, consisting non-noble metal and working weak acid at an ambient temperature, was investigated CPOM. MWCNTs catalyst, which prepared by impregnation method characterized via HRTEM, XRD, XPS, FT-IR,...

This study systematically investigates the mechanism of NOx emissions during sintering process, with a focus on utilization biochar as an auxiliary fuel to replace portion coke traditionally used in iron ore sintering. The research involved simulation raw material ratios using ore, biochar, and powder. Substitution levels for were set at 0%, 20%, 40%, 50%, 60%, 80%, 100%. process monitored flue gas detection system. Simultaneously, comprehensive analysis sintered was conducted aim producing...

The effect of a ZrO₂ support on the activity and adsorption behavior Cu/Fe₂O₃–CeO₂/ZrO₂ catalysts was promoted by oxygen vacancy.

A multi-focus optical fiber lens is numerically demonstrated based on an all-dielectric metasurface structure. The consists of array rectangular silicon resonators with varying widths in order to obtain the required phase distribution. core diameter multimode large enough contain sufficient resonance units. spatial distribution dielectric dictated by multiplexing, including interleaving meta-atoms and aperture division, achieve properties. proposed metalens can produce two or three focal...

This study employed the water-thermal coupled high-temperature CO2 gasification method using Zhundong coal as raw material to prepare porous carbon materials. A dual-function catalyst for NOx adsorption and reduction was prepared by loading Cu, Mn, Ce components onto through hydrothermal impregnation. The influence of metal content on pore structure, surface functional groups, synergistic effects between metals in carbon-based investigated during preparation process. In process removal...

In this study, Mn–Co bimetallic catalysts were prepared by a coprecipitation method. The effect of different Mn/Co molar ratios on the performance NH3–SCR, CO-SCR, and CO oxidation was investigated, representative catalyst selected to test NOx catalytic activity NH3–CO-SCR synergy reaction. microphysical chemical properties samples characterized X-ray photoelectron spectroscopy, Raman other analytical techniques. CO-assisted NH3 removal mechanism explored through in situ diffuse reflectance...

A series of CuMnO x catalysts were prepared through the coprecipitation method to explore effect CO participation on NH 3 -SCR reaction.

Activated semi‐coke was developed and loaded by iron species other assistant metals (Co, La, Ce) using a hydrothermal method to obtain the abatement of NO x emissions from power plants then used for removal CO. These catalysts were systematically characterized N 2 physisorption, scanning electron microscopy, X‐ray diffraction, photoelectron spectroscopy, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), activity reduction. The results showed that activated Fe...