The introduction of optoelectronic functions into viscoelastic polymers can yield highly sophisticated soft materials for biomedical devices and autonomous robotics. However,v iscoelasticity and excellent optoelectronic properties are difficult to achieve because the presence of al arge number of p-conjugated moieties drastically stiffens apolymer. Here,w er eport av ariation of additive-free viscoelastic conjugated polymers (VE-CPs) at room temperature by using an intact p-conjugated backbone and bulky,yet flexible, alkyls ide chains as "internal plasticizers." Some of these polymers exhibit gel-and elastomer-like rheological behaviors without cross-linking or entanglement. Furthermore,b inary blends of these VE-CPs exhibit an ever-seen-before dynamic miscibility with self-restorable and mechanically induced fluorescence color changes.

Bulky but flexible alkyl side chains enable π-conjugated polymers to possess wide-range elastic modulus tuneability, yet consistent red luminescent properties.

The excellent electrochemical performance of greigite (Fe3S4) coupled with its vast abundance and low toxicity make it a good prospect as an anode material for lithium ion batteries (LIBs). In this research, a simple and feasible approach for producing pure phase, small sized, shape-controllable, and stable Fe3S4 nanoplates (NPs) through hot injection of sulfur solution into Fe(iii) solution was demonstrated. The growth of Fe3S4 NPs involves the primary formation of a pyrite (FeS2) nucleus and subsequent Fe(iii) doping. The lateral size of the Fe3S4 NPs was controlled further by tuning the experimental variable-dependent reactivity of Fe sources in the nucleation and growth stage. The Fe3S4 NPs embedded in LIBs present a low electrochemical resistance and are highly active in lithiation/delithiation processes.

Electrets are a class of dielectric materials with quasi-permanent electric charges or molecular dipoles and the ability to generate electrostatic charge in response to external oscillation and pressure without an...