▎ 摘　　要

NOVELTY - A graphene quantum dot-based sensor (100) consists of a p-type substrate (101), an oxide layer (102) grown on the p-type substrate by thermal oxidation, an interdigitated electrode (103) including connecting terminals (105), provided on the oxide layer, a contact pad (104) provided on the electrode interdigitated for bonding with printed circuit board, and graphene quantum dots (106) deposited between the interdigitated electrodes by drop-casting or spin-coating processes. USE - Graphene quantum dot-based sensor is used in system for measuring moisture content in environment e.g. soil (all claimed). ADVANTAGE - The graphene quantum dot-based sensor has excellent stability and durability, and effectively and economically measures moisture content in environment, with reduced power consumption in short period of time. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of graphene quantum dot-based sensor; and (2) system for measuring moisture content of soil. DESCRIPTION OF DRAWING(S) - The drawing shows schematic view illustrating manufacture of graphene quantum dot-based sensor. Graphene quantum dot-based sensor (100) P-type substrate (101) Oxide layer (102) Interdigitated electrode (103) Contact pad (104) Connecting terminals (105) Graphene quantum dots (106)