Friction Tuning of Interlayer Exciton Recombination in Van der Waals Heterostructures.

Van der Waals heterostructures combine low friction with excellent optoelectronic properties, making them suitable for opto-nano-electromechanical systems. While the long lifetime of interlayer excitons in these materials helps reduce energy loss, friction in mechanical systems is unavoidable and can shorten the exciton recombination lifetime, undermining the low-friction benefits. Despite its importance, the fundamental mechanism underlying friction-induced changes in exciton recombination remains unexplored, mainly due to the difficulty of probing long-lifetime exciton recombination at friction interfaces.

Bilayer-Structured Passive Radiative Cooling Coating with Thin Thickness, Highly Scattering, and Enhanced Thermal Dissipation.

Passive daytime radiative cooling (PDRC) is a new thermal management solution that does not rely on external energy sources. Traditional PDRC materials have a relatively high thickness (typically 500-800 μm), which prevents efficient cooling and limits their application scenarios. To address this challenge, we propose a bilayer porous structure that meets the application needs of different scenarios (both below-ambient and above-ambient temperatures).

Thermomechanically Resilient Polyionic Elastomers with Enhanced Anti-Icing Performances.

Anti-icing gels inhibit ice formation and accretion; however, current iterations face prevalent drawbacks such as poor strength, weak substrate adhesion, and limited anti-icing properties. Herein, we propose a novel approach to address these challenges by developing a thermomechanical robust polyionic elastomer (PIE) with enhanced anti-icing properties. The PIE surface exhibits an icing delay time up to 5400 s and remains frost-free after exposure to -10 °C for 3.

Multifunctional Anti-Icing Gel Surface with Enhanced Durability.

Materials with low ice adhesion and long-lasting anti-icing properties remain an ongoing challenge in ultralow temperature environments (≤-30 °C). This study presents a gel material consisting of a polymer matrix (copolymer of polyurethane and acrylamide) and an anti-icing agent, ethylene glycol (EG), designed for anti-icing applications at ultralow temperatures. The surface shows a prolonged droplet freezing delay of ca.

Transparent Nano Thin-Film Transistors for Medical Sensors, OLED and Display Applications.

Background: Transparent thin-film transistors (TFTs) have received a great deal of attention for medical sensors, OLED and medical display applications. Moreover, ultrathin nanomaterial layers are favored due to their more compact design architectures.

Methods: Here, transparent TFTs are proposed and were investigated under different stress conditions such as temperature and biases.

A newly developed transparent and flexible one-transistor memory device using advanced nanomaterials for medical and artificial intelligence applications.

 Artificial intelligence (AI) integrated circuits (IC) have memory devices as the key component. Due to more complex algorithms and architectures required by neuroscience and other medical applications, various memory structures have been widely proposed and investigated by involving nanomaterials, such as memristors.  Due to reliability issues of mass production, the dominant memory devices in many computers are still dynamic random access memory (DRAM).

Disodium edetate as a promising interfacial material for inverted organic solar cells and the device performance optimization.

Disodium edetate (EDTA-Na), a popular hexadentate ligand in analytical chemistry, was successfully introduced in organic solar cells (OSCs) as cathode interfacial layer. The inverted OSCs with EDTA-Na showed superior performance both in power conversion efficiency and devices stability compared with conventional devices. Interestingly, we found that the performance of devices with EDTA-Na could be optimized through external bias treatment.