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Herein, a flexible and dual-mode triboelectric nanogenerator (TENG) combining both vertical contact-separation and solitary electrical settings was created to convert environmental mechanical energy into electrical energy making use of highly encapsulated and multifunctional techniques. By introducing the polymer melt wetting technique, polymer nanotubes are fabricated on the surface of the TENG, which gives self-cleaning and hydrophobic features good for water-drop energy ha