Surface electrical conductivity of poly(methyl methacrylate) thin films: Observation of conductivity switching

► Surface electrical conductivity in poly(methyl methacrylate) (PMMA) thin films. ► Conductivity switching at a threshold voltage (Vth) in PMMA thin films. ► Conduction mechanisms in the voltage regions lower and higher than Vth are different. ► Conductivity switching arises possibly due to structural reorientation in PMMA. ► Reversibility of the system demonstrates its suitability for electronic devices.