In the world of increasing energy consumption, nanogenerators have shown great potential for energy harvesting and self-powered portable electronics. Herein, a flexible and dual-mode triboelectric nanogenerator (TENG) combining both vertical contact-separation and single electrical modes has been developed to convert environmental mechanical energy into electricity using highly encapsulated and multifunctional strategies. By introducing the polymer melt wetting technique, polymer nanotubes are fabricated on the surface of the TENG, which provides self-cleaning and hydrophobic features beneficial for water drop energy harvesting using the device. In such mechanical energy harvesting, the maximum output power of 0.025 mW and the open-circuit voltage of 41 V can be achieved. By designing the dimensions of the device, the dual-mode TENG is utilized as a self-powered sensor to detect human body motions such as phalanges’ movement of fingers. The fabricated dual-mode TENG promotes the development of energy-harvesting and self-powered human motion sensors for artificial intelligent prosthetics, human kinematics, and human body recovery treatment.

Rechargeable zinc-metal batteries have attracted widespread attention recently as a potential substitute for lithium-ion batteries due to their low cost, large volumetric capacity and the capability to use a safe...

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Nanotechnology and its application are widely used in the field of life, human exploration of life science has entered the nano level, which is of great significance for exploring the essence of cellular life. This paper explores the changes in the mechanical characteristics of tumor cells after the photothermal effect of nanomaterials. The experiments used AFM and SEM to measure and observe SKOV-3 cells before and after the treatment. It was found that the cell height, morphology, cell adhesion, and Young’s modulus had significantly changed. In the PPy-GNPs+Laser group, the adhesion force value was 3.57±1.25 nN, and Young’s modulus was 27.4±2.47 kPa. From the data, a 53.9% increase in Yong’s modulus of laser test PPy-GNPs as compared with the control group. It shows that the photothermal effect of nanoparticles has an important effect on the changes of cell ultrastructure, which has important significance for explaining the changes of cell physiological functions from the perspective of cell mechanics.