▎ 摘　　要

NOVELTY - The dopamine concentration detector comprises a silicon substrate. The carbon film is embedded with graphene nano-crystal. The carbon film embedded with graphene nano-crystal is set on the silicon substrate. The two-dimensional plane direction of the graphene nano-crystal is vertical to the silicon substrate. A first electrode is connected with the silicon substrate. A second electrode is connected with the carbon film embedded with graphene nano-crystal. The silicon substrate is selected from an intrinsic silicon substrate, a p-type silicon substrate and an n-type silicon substrate. USE - Dopamine concentration detector for detecting dopamine concentration in human kidney and nervous system. ADVANTAGE - The dopamine concentration detector has simple structure, good stability and durability, and can realize the detection of dopamine concentration by single liquid drop, the response speed is fast, the detection cost is low, even if the dopamine solution is mixed with other chemical substances, and can not interfere the detection effect, and the detection concentration can reach 0.1 M. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for preparing dopamine concentration detector; (2) a method for detecting concentration of dopamine. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of carbon film embedded with graphene nano-crystal. (Drawing includes non-English language text).