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Developing multifunctional triboelectric nanogenerators (TENGs) with special intelligence is of great significance for next‐generation self‐powered electronic devices. However, the relevant work on the intelligent TENGs, especially those spontaneously responsive to external stimuli, is rarely reported. Herein, an intelligent TENG with thermal‐triggered switchable functionality and high triboelectric outputs is developed by designing a movable triboelectric layer, which is driven by a two‐way shape memory polyurethane. The resultant TENG device can be spontaneously switched on/off in response to the environmental temperature change, i.e., switching on at 0 °C and off at 60 °C. At the "on" state, the developed TENG exhibits excellent triboelectric performance with a maximum output power density of 5.15 W m−2 at a pressure of 30 kPa due to the unique advantages of micro‐/nanofiber triboelectric surfaces. Furthermore, the great potential of the switchable TENG in intelligent wearable electronic applications is demonstrated, which can serve as not only the sensing element for monitoring human movement and physical condition in a cold environment but also the thermal‐driven switch for turning on/off the heating function on demand. The intelligent "on–off" switchable TENG combined with excellent triboelectric performance may provide new opportunities for future self‐powered wearable electronics. [ABSTRACT FROM AUTHOR]

In this paper, we reported the preparation of micro-/nanofibers via co-assembly with paclitaxel (PTX) and dextran (DEX). The co-assembly fibers formed in PTX and DEX mixture solution via non-covalent interactions including hydrophilic/hydrophobic interactions and π-π stacking. The micro-/nanofibers could be obviously observed when the mixed solution became turbid and ivory-white in color. The properties of fibers were characterized by SEM, TEM, FTIR, DSC, XRD, in vitro release and MTT assay. The length of fibers could reach several centimeters. The diameter of microfibers and nanofibers was about 800 nm and 80 nm, respectively. In addition, the PTX loading efficiency was over 78% in co-assembly fibers and up to 84% when PTX and DEX (Mw: 40,000) both were 2 mg/mL. The sustained drug release and low cytotoxicity in vitro of PTX/DEX fibers were also demonstrated. Therefore, we believe that PTX/DEX micro-/nanofibers would have great potential for drug delivery of PTX. [ABSTRACT FROM AUTHOR]