▎ 摘　　要

NOVELTY - The method involves determining a desired morphology for a metallic layer of a composite film structure. A metal substrate is selected based on the determining. A graphene layer is transferred onto the metal substrate. The metallic layer is deposited on the graphene layer to achieve the desired morphology. The metal substrate is removed from the graphene layer and the deposited metallic layer to form the composite film structure, where surface energy difference between the metal substrate and the deposited metallic layer results in the desired morphology of the metallic layer. USE - Method for fabricating a composite film structure for a wearable sensor i.e. strain sensor system, for measuring mechanical movements in a biological sample (claimed) in a structural health monitoring application e.g. civil engineering application and aeronautics application, biometrics acquisition application e.g. heart rate application and motion detection application, groundwater contamination testing application, in-vivo biochemical analysis application i.e. optical fiber catheterization application, and a drug discovery application e.g. drug screening application and cardiotoxicity studies. Can also be used for a clothing. ADVANTAGE - The method enables reducing crack propagation through a polyaniline film by stiffness of an underlying graphene, which can be manifested in reduction of a gauge factor from without being bound of a specific theory. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for forming a substrate for surface-enhanced Raman scattering (2) a method for performing surface-enhanced Raman scattering of an analyte (3) a strain sensor (4) a system for measuring mechanical movements in a biological sample. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating a process for generating nanoislands and scanning electron micrographs of metallic nanoislands on substrates obtained by electron beam evaporation of evaporant onto a graphene/metal substrate. Step for growing graphene on copper foil (1) Step for evaporating gold and silver (2) Step for performing substrate/evaporant-dependent morphologies (3) Step for etching metal substrate (4)