▎ 摘　　要

Depositing patterned graphene on ceramic has been challenging due to multiple process steps required. In this paper a 355 nm wavelength ultraviolet (UV) picosecond laser was used to irradiate flour paste deposited on an Al2O3 ceramic substrate to form graphene without the need for a metallic precursor. The effect of process parameters including laser power, scanning speed, repetition rate and concentrations of the flour solution on graphene formation is investigated. The result shows that a concentration of 20% white wheat flour solution mixed with deionized water can ideally generate high quality graphene when processed with the picosecond laser at a 38 J/cm(2) laser fluence with 30 to 36 scan passes at a scanning speed of 100 mm/s. This low cost, one-step and versatile technique would have the potential for making high temperature electrical devices and sensors