Showing papers by "Xihua Wang published in 2023"
TL;DR: In this article , the organic combination of composition and structure is a practical approach to improving the performance of microwave absorbing materials, which is an important area of research in the field of electromagnetic protection.
Abstract: Microwave absorbing materials is an important area of research in the field of electromagnetic protection. In particular, the organic combination of composition and structure is a practical approach to improving the performance of microwave absorbing materials. In this study, [email protected] nanofibres were coated with graphene [email protected] fibres using electrostatic spinning technology to obtain core-shell porous structure reduced graphene [email protected] carbon nanofibres ([email protected]). The advantages of the core-shell porous structure and composition were fully exploited, and the organic combination of the two resulted in excellent microwave absorption properties of [email protected] The minimum reflection loss is -54.16 dB at 16.8 GHz, and the effective absorption bandwidth reaches 9.71 GHz at a thickness of 3.29 mm. [email protected] also exhibit high moisture resistance and thermal infrared stealth properties. These results indicate that [email protected] are of great value in the synthesis and application of microwave absorbing materials.
TL;DR: In this article , a multilayer structure strategy is proposed to fabricate transparent and flexible indium tin oxide (ITO)/silver nanowire (AgNW) composite films, achieving a multifunctional integration of high light transmission, strong EMI shielding, and good thermal insulation properties of the composite films.
Abstract: As the working environment becomes more complex, the visualization of windows in electronic devices increasingly requires transparent and flexible electromagnetic interference (EMI) shielding films. There is a need for materials with EMI shielding properties, while maintaining excellent high light transmission and good thermal insulation. However, the preparation of such multifunctional materials remains challenging due to the respective mechanisms of action of the different properties. Herein, a multilayer structure strategy is proposed to fabricate transparent and flexible indium tin oxide (ITO)/silver nanowire (AgNW) composite films, achieving a multifunctional integration of high light transmission, strong EMI shielding, and good thermal insulation properties of the composite films. Simultaneously, the layered structure was designed and the potential optimization mechanism of the EMI shielding performance of the composite film was analyzed, providing great flexibility for the preparation of transparent composite films. The combination of excellent EMI shielding performance, outstanding near-infrared shielding performance, and high light transmittance makes the ITO/AgNW (IA) composite films promising for abundant potential applications.
TL;DR: In this article , a rare-earth [email protected] nanofiber aerogel has successfully manufactured to meet the demand for multifunctional microwave absorbing materials in aircrafts due to their harsh service environment.
Abstract: Multifunctional microwave absorbing materials are urgently needed in aircrafts due to their harsh service environment. Herein, a rare-earth [email protected] nanofiber aerogel has successfully manufactured to meet this demand. The light aerogel not only exhibits a wide efficient bandwidth (7.44 GHz) and strong reflection loss (−63.7 dB), but also excels in infrared thermal camouflage, self-cleaning, and mechanical strength. These excellent properties are related to the porous construction of the aerogel and plenty of heterogeneous interfaces. This work provides insights into novel ideas for multifunctional microwave-absorbing materials with enormous potential.
TL;DR: In this paper , the authors conduct a simulation study to investigate the feasibility of a near-infrared (NIR) CMOS image sensor enabled by another integration strategy, that is, by forming a CQD-Si heterojunction.
Abstract: The solution processibility of colloidal quantum dots (CQDs) promises a straightforward integration with Si readout integrated circuits (Si-ROCIs), which enables a near-infrared (NIR) CMOS image sensor (CIS; CMOS stands for complementary metal-oxide semiconductor). Previously demonstrated CQD NIR CISs were achieved through integrating CQD photodiode or PhotoFET with Si-ROCIs. Here, we conduct a simulation study to investigate the feasibility of a NIR CIS enabled by another integration strategy, that is, by forming a CQD-Si heterojunction. Simulation results clearly show that each active pixel made of CQD-Si heterojunction photodiode on the CIS sensitively responds to NIR light, and generated photocarriers induce changes in electrostatic potentials in the active pixel. The potential changes are read out through the integrated circuits as validated by the readout timing sequence simulation.