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Despite great promise as next-generation high-capacity energy storage devices, lithium–sulfur batteries still face technical challenges in long-term cyclability. With their porous structures and facile synthesis, metal–organic frameworks (MOFs) are tunable platforms for understanding polysulfide redox and can serve as effective sulfur hosts for lithium–sulfur batteries. This feature article describes our design strategies to tailor MOF properties such as polysulfide affinity, ionic conductivity, and porosity for promoting active material utilization and charge transport efficiency. We also present engineering approaches for implementing MOF-based sulfur cathodes for lithium–sulfur batteries with high volumetric density and under low temperature operation. Our studies provide fundamental insights into sulfur–host interactions and polysulfide electrochemistry in the presence of porous matrices, inspiring future designs of advanced batteries. [ABSTRACT FROM AUTHOR]

An omega (Ω)-like DNA nanostructure was for the first time utilized for homogenous electrochemical monitoring of small molecules (ATP used in this case) based on target-induced formation of DNAzyme–aptamer conjugates without the need for sample separation and washing. [ABSTRACT FROM AUTHOR]

A novel, enzyme-free amperometric immunoassay of biomarkers with sensitive enhancement was designed by using gold nanoflower-labeled detection antibodies toward the catalytic reduction of p-nitrophenol and redox cycling of p-aminophenol on a graphene-based Au(111) platform. [ABSTRACT FROM AUTHOR]