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Liquid metal (LM) bioelectronics find widespread uses in healthcare devices and medical implants. However, the current LM‐based electrodes suffer from achieving a combination of features including stable conductivity, high tissue adhesion, stability, good biocompatibility, degradability, and recyclability. In this work, a stable LM electrode is prepared with an extremely high adhesion strength (8.9 MPa), which is tunable in a wide range by introducing an adhesive ureidopyrimidinone (UPy)‐based polymer to harvest the abovementioned properties. With the help of dynamic LM particle‐polymer interactions in the polymer matrix, LMs can not only enhance the adhesion properties but also form a percolated network at a low LM loading (38 vol%) to achieve a high conductance stability (R/R0 = 0.76 at 100% strain). The high adhesion strength provides a highly stable electrical connection with rigid components with a high stretchability of 1154% when mounting a resistor, while a relatively low adhesion makes it a comfortable wounded skin‐interfaced electrode for accelerating wound healing. Taking advantage of their tunable surface adhesion and biocompatibility, the as‐prepared LM electrodes provide a more reliable and friendly approach to the development of healthcare devices. [ABSTRACT FROM AUTHOR]

Here, a superhydrophobic and catalytically active metal–organic framework (MOF) coating is reported by coordination‐driven assembly of MOF nanoparticles and a catechol‐functionalized polysiloxane polymer. This MOF coating can be fabricated by casting MOF‐polymer precursor onto diverse substrates with varied coating techniques, for example, spray coating, bar coating, and dip coating. The catechol‐functionalized polymer can not only coordinate to the open metal sites on MOF surface which enables the surface functionalization and assembly of MOF nanoparticles, but also allow non‐covalent interactions with casting substrates—thus improving the substrate adhesion of the MOF coating. With the well‐preserved porosity and surface hydrophobicity, the MOF coating demonstrates superhydrophobicity as well as improved catalytic activity toward the Knoevenagel condensation at room temperature. Such coordination‐driven assembly approach can be extended to a range of MOF systems for preparing highly functional composite materials toward various applications. [ABSTRACT FROM AUTHOR]

Abstract: Constructing complex nanoarchitectures via self‐assembly with nanoparticle building blocks is a practical strategy that produces nanostructures with properties that are absent in the individual unit. In this work, we used hydrophilic carbon dots (C‐dots) as building blocks to form C‐dot assemblies. Compared to the individual C‐dot, the self‐assembled C‐dots showed about 30 nm red‐shift of absorption, resulting in the 5.1% increasing of photothermal conversion efficiency upon a 671 nm laser irradiation. More importantly, the C‐dot assemblies enable them can be efficiently uptaken by cancer cells. Meanwhile, in vitro study demonstrated the C‐dot assemblies can efficiently kill cancer cells than that of individual C‐dot upon irradiation for 5 min at equivalent C‐dot concentration. Our study may provide a new strategy for the efficient photothermal therapy of cancer based on C‐dots. [ABSTRACT FROM AUTHOR]