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Heterochiral Doped Supramolecular Coordination Networks for High-Performance Optoelectronics
摘要： Chiral self-sorting has great potential for constructing new complex structures and determining chirality-dependent properties in multicomponent mixtures. However, it is still of great challenge to achieve high fidelity chiral self-discrimination. Besides, the researches on the coordination polymers or metal-organic frameworks (CPs/MOFs) for micro-/nano-optoelectronics are still rare due to their low conductivity and difficulty in developing a rapid and simple scale-up synthetic method. Here, heterochiral supramolecular coordination networks (SCNs) were synthesized by the solvothermal reaction of naphthalene diimide enantiomers and cadmium iodide, using the chirality as a synthetic tuning parameter to control the morphologies. Intriguingly, heterochiral micro-/nanocrystals exhibited photochromic and photodetecting properties. Furthermore, we also developed a simple and efficient doping method to enhance the conductivity and photoresponsivity of micro-/nanocrystals using hydrazine. From experimental and theoretical studies, the mechanism was suggested as follows: the radicals in the singly occupied molecular orbital (SOMO) level of the ligands provide charge carriers that can undergo “through-space” transport between π–π stacked ligands and the electron transfer from adsorbed hydrazine to the SCNs results in reduction of energy gap, leading to increased conductivity. Our findings demonstrate a simple and powerful strategy for implementing coordination networks with redox ligands for micro-/nano-optoelectronic applications.
关键词： chiral self-discrimination,doping,micro-/nano-devices,optoelectronics,supramolecular coordination network
更新于2025-11-19 16:56:35
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Tunable Plasmonic System Based on a Slotted Side-Coupled Disk Resonator and Its Multiple Applications on Chip-Scale Devices
摘要： In this letter, based on the subwavelength metal-insulator-metal (MIM) waveguide embodying a baffle and a slotted side-coupled disk resonator (SSCDR) inserted with a metallic block is designed. The proposed structure is numerically investigated and analyzed by FEM method. Two sharp transmission peaks with high transmittance and asymmetrical line-shaped Fano resonances, originating from the interferences between the width continuum state supported by the MIM waveguide embodying a baffle and the narrow discrete state from the SSCDR, arise in its transmission spectrum. And multimode interference coupled mode theory (MICMT) is employed to analyze the proposed structure theoretically, which is consistent with the simulation results. Additionally, by adjusting the parameters of the structure, the resonant wavelengths of Fano resonances can be manipulated. Finally, the proposed structure is applied to nano-filters, refractive index (RI) sensors, temperature sensors and slow light devices, all showing high performance. It is believed that the proposed system can boost the development of highly integrated photonics and support substantial applications for nano-sensors, filters and slow light devices.
关键词： fano resonance,metal-insulator-metal,nano-devices,plasmonics
更新于2025-09-23 15:19:57
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[IEEE 2019 International Conference on Advanced Electrical Engineering (ICAEE) - Algiers, Algeria (2019.11.19-2019.11.21)] 2019 International Conference on Advanced Electrical Engineering (ICAEE) - Design of a Backstepping-Controlled Boost Converter for MPPT in PV Chains
摘要： With much advancement in the field of nanotechnology, bioengineering, and synthetic biology over the past decade, microscales and nanoscales devices are becoming a reality. Yet the problem of engineering a reliable communication system between tiny devices is still an open problem. At the same time, despite the prevalence of radio communication, there are still areas where traditional electromagnetic waves find it difficult or expensive to reach. Points of interest in industry, cities, and medical applications often lie in embedded and entrenched areas, accessible only by ventricles at scales too small for conventional radio waves and microwaves, or they are located in such a way that directional high frequency systems are ineffective. Inspired by nature, one solution to these problems is molecular communication (MC), where chemical signals are used to transfer information. Although biologists have studied MC for decades, it has only been researched for roughly 10 year from a communication engineering lens. Significant number of papers have been published to date, but owing to the need for interdisciplinary work, much of the results are preliminary. In this survey, the recent advancements in the field of MC engineering are highlighted. First, the biological, chemical, and physical processes used by an MC system are discussed. This includes different components of the MC transmitter and receiver, as well as the propagation and transport mechanisms. Then, a comprehensive survey of some of the recent works on MC through a communication engineering lens is provided. The survey ends with a technology readiness analysis of MC and future research directions.
关键词： chemical signal,Molecular communication,nano devices,diffusion
更新于2025-09-19 17:13:59