Sanhua Holding Group (China)

This work elucidates the K + -assisted crystallization of carbon nitride, showing how synthesis atmosphere balances photoactivity and stability. Optimal air calcination at 550 °C produces a durable, high-performance photocatalyst.

Currently, the smart photonic materials that can switch circularly polarized signals in real-time have attracted extensive attention due to numerous potential applications in information storage and photonics displays. However, the dynamically reversible switching of circularly polarized signals requires precise structural reconfiguration, which is rarely achieved in traditional biomaterials. Herein, a dual photonic bandgap (PBG) structure is constructed based on the optical propagation principle of cellulose-based photonic crystals, enabling the flexible switching of the intensity, wavelength, and direction of circularly polarized luminescence (CPL). By adjusting the fluorescence intensity and the matching degree of chiral structure, the asymmetric factor value of dual PBG structure is up to -1.47, far exceeding other cellulose-based materials. Importantly, it is demonstrated that dual CPL emission can be efficiently induced by two different PBGs, opening a new approach for on-demand switching of single and dual CPL emission. In addition, the dual PBG structure exhibits dual circularly polarized reflected signals under the circular polarizer, which perfectly embodies the applicability of multiple encryptions in QR codes. This work provides new insights into the real-time manipulation of circularly polarized signals by chiral photonic materials.

An ultra‐fast photonic soldering approach to be introduced in the display module package, which has great advantages in soldering low temperature and heat sensitive components, was demonstrated. The soldering and heat conduction process was verified. As a result, flexible substrate was successfully interconnected on the display panel by photonic soldering.

Abstract In the synthetic leather industry, solvent‐free polyurethane film (SFPU) was poor in water vapor permeability (WVP) and washability. In this study, we introduced the hollow nano‐TiO2 spheres (HNTSs) with high photocatalytic performance and permeability performance as well as large surface area into the SFPU film to endued its superior water vapor permeability property, self‐cleaning performance and water resistance. First of all, HNTSs were prepared via the controllable chemical route using HF for internal corrosion of solid nano‐TiO2 spheres, and then introduced into hydroxyl prepolymer to prepare solvent‐free polyurethane/HNTSs composite film. The results of SEM, FT‐IR and UV analyses indicated HNTSs were successfully dispersed evenly into SFPU. Application experiment results showed that the addition of HNTSs with hollow structure had an important effect on the WVP, photocatalytic performance, mechanical property, the water vapor transmission rate, self‐cleaning performance as well as tensile strength were increased by 111.98%, more than 100%, and 36.368%, respectively.