Coordination polymer frameworks (CPFs) have broad applications due to their excellent features, including stable structure, intrinsic porosity, and others. However, preparation of thin‐film CPFs for energy storage and conversion remains a challenge because of poor compatibility between conductive substrates and CPFs and crucial conditions for thin‐film preparation. In this work, a CPF film was prepared by the coordination of the anisotropic four‐armed ligand and CuII at the liquid–liquid interface. Such film‐based micro‐supercapacitors (MSCs) are fabricated through high‐energy scribing and electrolytes soaking. As‐fabricated MSCs displayed high volumetric specific capacitance of 121.45 F cm−3. Besides, the volumetric energy density of MSCs reached 52.6 mWh cm−3, which exceeds the electrochemical performance of most reported CPF‐based MSCs. Especially, the device exhibited alternating current (AC) line filtering performance (−84.2° at 120 Hz) and a short resistance capacitance (RC) constant of 0.08 ms. This work not only provides a new CPF for MSCs with AC line filtering performance but also paves the way for thin‐film CPFs preparation with versatile applications.

No abstract

No abstract

Multiform electromagnetic beams (multi-direction, multi-polarization, multi-frequency, and multi-beam) generated by ultrathin metasurfaces show promising prospects in multiple optical traps, modern communication systems, and identification in complex environments. However, their application is limited by their inability to generate desired multiform beams simultaneously. Here, a multifunctional surface using a polarization selection structure and integrated electric and magnetic structures is proposed to solve the above problem. This surface is composed of three layers with weak coupling that can achieve different quasi-nondiffracting beams. The top and bottom layers are reflective surfaces that can reflect two different incident waves to generate two types of quasi-non-diffracting beams. The middle layer is a transmissive surface that can transmit another incident wave to generate the third type of quasi-non-diffracting beams. For verification, the surface was fabricated and tested. The results of a full-wave simulation and measurements revealed that three different forms of quasi-non-diffracting beams could be generated by the proposed surface.

No abstract