Chronic wound healing is a complex and long-standing problem, that has been a major and critical clinical concern around the world for years. Recent advances in digital wound dressings open new possibilities for solving the problem. Here, we report a battery-free, fully permeable, skin-adhesive, stretchable electronic wound bandage (iSAFE) for intelligent wound management. This electronic bandage exhibits superior properties in multiple features and can be conformally adhered to the skin wound. In addition, the iSAFE can accurately assess the wound conditions in-situ and thus adaptively perform localized drug release. The results from both in vitro and in vivo studies on animals prove the validity of wound monitoring, wound healing boosting and intelligent closed-loop wound management. Clinical trials on patients across age 18 to 95 with various types of wounds are performed. These results all indicate the unique and universality of the reported technology for wound monitoring and management.

We report a micellar system to prepare Pt-TMDs composites with tunable Pt nanoparticles (NPs, 2–6 nm in size) on single-layer TMDs (MoS₂, TiS₂, TaS₂) nanosheets. The Pt–MoS₂ composites have shown excellent performance for the hydrogen evolution reaction (HER) with the Pt NPs exhibiting a volcano-type size effect toward HER activity due to the synergistic effects between the Pt NPs and MoS₂.

Miniaturized mobile electronic system is an effective candidate for in situ exploration of confined spaces. However, realizing such system still faces challenges in powering issue, untethered mobility, wireless data acquisition, sensing versatility, and integration in small scales. Here, we report a battery-free, wireless, and miniaturized soft electromagnetic swimmer (SES) electronic system that achieves multiple monitoring capability in confined water environments. Through radio frequency powering, the battery-free SES system demonstrates untethered motions in confined spaces with considerable moving speed under resonance. This system adopts soft electronic technologies to integrate thin multifunctional bio/chemical sensors and wireless data acquisition module, and performs real-time water quality and virus contamination detection with demonstrated promising limits of detection and high sensitivity. All sensing data are transmitted synchronously and displayed on a smartphone graphical user interface via near-field communication. Overall, this wireless smart system demonstrates broad potential for confined space exploration, ranging from pathogen detection to pollution investigation.

Electrodes with good mechanical and electrical properties serve as the key component for realizing high-performance flexible electronics. Here, we introduce a low-cost and scalable method with precise pattern control for producing intrinsically stretchable and transparent conductive elastomers based on silver nanowires (Ag NWs). The optimized electrodes in this work exhibit great transparence over 78%, a low sheet resistance of ∼18 Ω sq⁻¹ and remarkable mechanical properties without significant conductivity loss upon thousands of cycles of stretching, twisting, bending and pressing. The transparent Ag NWs can be precisely patterned onto a soft substrate at a microscale level and form a stretchable circuit. A skin-integrated electronic device with a 6 × 6 tactile sensor array was developed based on the resulting transparent and stretchable flexible circuit, indicating the possibility of the low lost and large area fabrication of electronic skin.

Motion monitoring by flexible strain or pressure sensors have been under spotlight in the field of wearable electronics. Based on triboelectric effect, generated energy from body contact and compression during daily movement can be used for both reflecting motion status and energy recollection. Here, we report a stretchable pressure sensor based on dual-mode triboelectric effect and dots-distributed metallic electrodes. The dots-distributed electrode based triboelectric nanogenerator (D-TENG) could be easily integrated with body and cloth, such as on the skin and under foot, to sense a broad range of activity related strain information. The D-TENGs enable accurate detecting a broad range pressure from ~5 kPa to ~50 kPa with open circuit voltage variation from several volts to tens of volts, and thus allow monitoring body daily actives such as joints' bending, walking and running. These devices maintain stable and high-level signal outputs even after thousands cycles of measurement, proving the good stability. Simultaneously, the mechanical energy produced by our body motions could also be recollected by the D-TENG sensor for energy harvesting. Under a constant tapping by finger (39.59 kPa), the induced voltage is sufficient to light up 15 LEDs. The stretchable dual-mode D-TENG sensor indicates its great potential in motion monitoring and mechanical energy harvesting.