Fig. 2From: Zigzag Hollow Cracks of Silver Nanoparticle Film Regulated by Its Drying Micro-environmentZigzag hollow cracks. a Schematic of the difference between UV irradiation and thermal treatment for the forming of surface nanoparticle film. b Zigzag-shaped ripples obtained with UV irradiation for 5 min. c More regular ripples obtained at a heated glass substrate at 60 °C for 5 to 15 min. d SEM-EDS measurementsBack to article page