3D MOF Nanoarchitecture Membrane via Ultrafast Laser Nanoforging

Abstract

Metal‐organic framework (MOF) crystals are useful in a vast area of applications because of their unique chemical and physical properties. Manufacturing of an integrated MOF membrane with 3D nanoarchitectures on the surface is especially important for their applications. However, as MOF crystals usually exist as powdery crystals, fabrication of their large area, monolithic, and high‐resolution patterns is challenging. Here, it is found that isolated MOF nanocrystals could be directly converted to a monolithic MOF film with designed 3D nanoarchitectures/patterns via an ultrafast laser induced nanoforging without binders. During the nanosecond laser shock, the voids among MOF nanocrystals are eliminated due to the surface amorphization effect, which allows the fusing of the MOF nanocrystals on the grain boundaries, leading to the formation of a dense film while preserving the nature of the pristine MOF. The high strain rate by laser enhances formability of MOFs and overcomes their brittleness to generate arbitrary 3D nanoarchitectures with feature sizes down to 100 nm and high productivity up to 80 cm2 min–1. These 3D MOF nanoarchitectures also exhibit boosted mechanical strength up to 100% compared with their powdery particles. This method is facile and low‐cost and could potentially be used in various fields, such as devices, separation, and biochemical applications.

Ultrafast nonlinear optical properties of MTe2 (M = V and Ta) and their application as broadband saturable absorbers

“…Due to these properties, transition-metal ditellurides have found diverse applications in fields such as optoelectronics, catalysis, and energy conversion. 29,30 The unique features of these materials, including a Dirac cone structure similar to that of graphene, high carrier mobility, and a wide operating band, distinguish them from conventional TMDCs. 20,31 As a result, they hold immense potential for applications in ultrafast pulse generation.…”

Design and Scalable Fabrication of Liquid Metal and Nano‐Sheet Graphene Hybrid Phase Change Materials for Thermal Management

“…[41] However, as the thermal conductivity of cement, especially dried porous cement, is not sufficiently large, there is still much room to improve the PCM composite system here. Liquid metals (LMs) or alloys, normally in the liquid phase at room temperature, offer high thermal conductivity, low toxicity, and fine fluidity, [42,43] when used as filling materials for PCM capsules. In 2020, Yuan et al developed a lightweight GaInSn-based LM composite, [44] in which the liquid-phase LM could fully contact with incorporated glass microbeads, which suggested that PCM capsules/LM composite have great feasibility.…”

“…[ 41 ] However, as the thermal conductivity of cement, especially dried porous cement, is not sufficiently large, there is still much room to improve the PCM composite system here. Liquid metals (LMs) or alloys, normally in the liquid phase at room temperature, offer high thermal conductivity, low toxicity, and fine fluidity, [ 42,43 ] when used as filling materials for PCM capsules. In 2020, Yuan et al.…”