Sustained Metal Ion Release-Controlled Synthesis of Polyoxometalate Subnanowires

Subnanowires (SNWs) are similar to polymers in dimension, exhibiting distinctive  polymer-like properties. They show not only multifunction due to the various inorganic compositions, but also good processability, which may become a bridge between conventional inorganic materials and polymers. Facile, strict, conditions-free, and scalable synthesis methods of SNWs are foundations of developing functional SNWs materials and devices. In this study, we develop a universal method for synthesizing SNWs composed of metal ions and phosphomolybdic acid nanoclusters (termed M-PMA SNWs) through a sustained-release strategy of metal ions, and successfully fabricate a series of these architectures. All of M-PMA SNWs can be processed into freestanding fibers and fabrics through electrospinning without polymer additives. Among them, the Ag-PMA SNW fabrics display good photothermal performance, which can be integrated into photothermal wearable fabrics. This work provides a highly practical synthesis method of M-PMA SNWs and combines functionalities and processability of SNWs effectively.