Fig. 3From: Self-Polarization of PVDF Film Triggered by Hydrophilic Treatment for Pyroelectric Sensor with Ultra-Low Piezoelectric Noisea Dipoles alignment relay process in PVDF triggered by the hydrophilic groups among the substrates. b Influences of thermal poling field and direction on pyroelectric responses of 8-h treated sample. c Schematic diagram of parallel and anti-parallel polingBack to article page