▎ 摘　　要

NOVELTY - Panel (10) comprises a substrate having a top surface (12); and a liquid-repelling element (22) disposed on the top surface as a single line free of parallel sublines, the single line defining a geometric pattern. The liquid-repelling element comprises graphene nanoparticles. USE - The panel is useful as a cooktop in cooking appliance (claimed). ADVANTAGE - The cooking appliances are capable of trapping or slowing spills so that they can be cleaned before surrounding worktops, floors, or furniture are damaged. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a cooking appliance comprising the panel as a cooktop; and (2) fabricating a panel which involves disposing a precursor solution directly onto a surface of a substrate in a pattern defined by a single line, the precursor solution comprising a polymer precursor and graphene nanoparticles; heating the substrate and the precursor solution; creating a liquid-repelling film comprising the graphene nanoparticles embedded within a polymeric matrix derived from the polymer precursor, the liquid-repelling film having the pattern from the precursor solution on the surface of the substrate; and forming the panel, where the liquid-repelling film exhibits a water contact angle of greater than or equal to about 160degrees and a water sliding angle of less than or equal to about 3degrees. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the panel. Panel (10) Top surface (12) Front edge (14) Rear edge (16) Liquid-repelling element (22)