Imparting multi-functionality to covalent organic framework nanoparticles by the dual-ligand assistant encapsulation strategy

The potential applications of covalent organic frameworks (COFs) can be further developed by encapsulating functional nanoparticles within the frameworks. However, the synthesis of monodispersed core@shell structured COF nanocomposites without agglomeration remains a significant challenge. Herein, we present a versatile dual-ligand assistant strategy for interfacial growth of COFs on the functional nanoparticles with abundant physicochemical properties. Regardless of the composition, geometry or surface properties of the core, the obtained core@shell structured nanocomposites with controllable shell-thickness are very uniform without agglomeration. The derived bowl-shape, yolk@shell, core@satellites@shell nanostructures can also be fabricated delicately. As a promising type of photosensitizer for photodynamic therapy (PDT), the porphyrin-based COFs were grown onto upconversion nanoparticles (UCNPs). With the assistance of the near-infrared (NIR) to visible optical property of UCNPs core and the intrinsic porosity of COF shell, the core@shell nanocomposites can be applied as a nanoplatform for NIR-activated PDT with deep tissue penetration and chemotherapeutic drug delivery.

Interfacial growth of free-standing PANI films: toward high-performance all-polymer supercapacitors

A covalently cross-linked polyaniline network is synthesized via interfacial Buchwald-Hartwig polymerization/deprotection, enabling the generation of additive/binder-free and high-performance conducting thin-films for energy storage.

Interfacial growth of 2D MOF membranes via contra-diffusion for CO2 separation

We report a simple, effective, and environmental-friendly method for the fabrication of high-quality 2D metal-organic framework (Ni3(HITP)2, HITP = 2,3,6,7,10,11-hexaiminotriphenylenesemiquinonate) membranes via contra-diffusion method. The as-prepared membrane is highly continuous...

Intermittent dynamics of bubble dissolution due to interfacial growth of fat crystals

Foams are inherently unstable objects, that age and disappear over time. The main cause of foam aging is Ostwald ripening: smaller air bubbles within the foam empty their gas content...

Construction of a PPIL@COF core–shell composite with enhanced catalytic activity for CO2 conversion

The porous poly(ionic liquid)-covalent organic framework (PPIL@COF) hybrids with core–shell structure were synthesized through surface modification of amino-functionalized PPIL and the interfacial growth with triazine-based TPT-DHTP-COF.

Diffusion Bonding of Al–Fe Enhanced by Gallium

In this research, diffusion bonding was carried out to produce transition joints between mild steel A36 (Fe A36) and aluminium Al 5083 (AA5083) with the presence of gallium (Ga) as an interlayer between the two faying surfaces. The microstructural development and interfacial growth of intermetallic compounds at the interface layer between Fe A36 and AA5083 after the diffusion bonding process were investigated. The joining was performed by clamping the two materials with a Ga interlayer and then heated in a furnace. The interlayer developed from this diffusion heating in air condition provides an average thickness of 30 μm. Characterization of intermetallic compounds was conducted using SEM-EDX and XRD. The results showed that SEM-EDX confirmed the occurrence of interdiffusion of elements from Fe A36 and AA5083 present at interlayer. XRD analysis reveals the formation of Fe3Al at the diffusion layer.