The invention discloses a resistance-changing
capacitance-changing composite two-dimensional
strain sensor and a preparation method thereof. The resistance-changing
capacitance-changing composite two-dimensional
strain sensor proposed by the invention is of a three-layer structure including an upper plate, an insulating
dielectric layer and a lower plate of of a
parallel plate capacitor in design.The
conductive materials for the upper plate and the lower plate are selected from metals having a micro / nano structure, a carbon
conductive materials or
metal-carbon mixed
conductive materials, thebipolar plate patterns are designed in a serpentine shape, and the upper plate and the lower plate of the
capacitor are simultaneously used as a resistance-changing
tensile strain sensor. The resistance-changing
capacitance-changing composite two-dimensional
strain sensor of the invention detects a
tensile strain in a horizontal direction through a capacitance-changing phenomenon, detects a
tensile strain in ae vertical direction through a resistance-changing phenomenon, and detects a tensile strain in a two-dimensional orthogonal direction by using the resistance-changing capacitance-changingcomposite form, so as to have flexible and tensile characteristics; and the resistance-changing tensile sensor adopts a permeable conductive
network structure and has good sensitivity.