Simple heat treatment for fabrication of carbonaceous layer-coated microelectrodes and conductive stainless steels

► We fabricate carbonaceous layer-coated electrodes: needle-type micro-ring electrode with a representative length of ∼1 μm and conductive and corrosion resistant stainless steel, by a simple heat treatment of petroleum pitch in flowing inert gas. ► We improved specific conductivity of the layer formed on quartz substrate by increases in temperature and period of the heating. ► We also improved conductivity of the layer on type-316 stainless steel and corrosion resistance of the steel by pre-treatment of nickel electroplating before the heating.