▎ 摘　　要

NOVELTY - A sandwich structure material comprises intermediate layer and metal layers located on both sides of intermediate layer. The intermediate layer comprises two-dimensional materials. USE - The sandwich structure material is used for a device. ADVANTAGE - The material uses extremely thin material as intermediate layer. The probability of electrons penetrating the intermediate layer is extremely sensitively changed with the thickness of the layer to significantly control the thermal conductivity of the metal/interlayer/metal sandwich structure with different thicknesses of the intermediate layer. Since the probability of electrons penetrating the middle layer varies with the number of layers extremely sensitively, it can be used to realize extremely sensitive thermal conductivity control of thickness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the sandwich structure material comprising making intermediate layer on metal layer, and making another metal layer on intermediate layer.