▎ 摘　　要

NOVELTY - The method involves passing light through a sample and a graphene-based surface plasmon resonance (SPR) sensor, where the light induces a plasmon resonance in a graphene (102), and intensity of the light is changed as the light passes through the graphene-based SPR sensor by way of interaction between the plasmon resonance in the graphene and vibrational dipole moments in the sample. The intensity of the light that is passed through the sample and the graphene-based SPR sensor is detected, where the intensity of the light detected represents molecular properties of the sample. USE - Method for analyzing a sample e.g. chemical sample and biological sample (all claimed), using a graphene-based SPR sensor. ADVANTAGE - The method enables facilitating high carrier mobility and conductivity in a proper manner by a lattice structure of the graphene for high plasmon field confinement and large plasmon propagation lengths. The method enables performing a tradeoff of the graphene versus nanoribbons to tune the plasmon resonance by graphene patterning when simplified process is easier to implement and reduce overall production costs. DETAILED DESCRIPTION - The sample is a biological sample that is selected from a group consisting of DNA, RNA, proteins, enzymes, cell samples and tissue samples. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a starting structure for forming a graphene-based SPR sensor using graphene nanoribbons, where a structure includes a graphene layer on a side of a dielectric layer opposite a conductive layer. Graphene (102) Substrate (104) Conductive layer (104a) Insulating dielectric layer (104b)