Fig. 4: Characterizations of high-density sensor array film.
From: High-density, highly sensitive sensor array of spiky carbon nanospheres for strain field mapping
a The average film thickness and (b) the average square resistances of SCN/PDMS composite films obtained with different SCN concentrations. The error bars represent standard deviation. c The SCNs films were patterned SCNs arrays with unit size of 100 μm. d Schematic diagram (up) and optical microscopic image (down) of four sensing units after interconnection. In the schematic diagram, the black squares are sensor units, the gray lines are interconnection lines made of silver/PDMS composites, and the blue squares are pure PDMS to separate longitude lines and latitude lines. e Photograph of sensor array with a density of 100 pixel cm−2. f The response of 36 random sensing units when the sensing film is under a uniform strain of 10%. SD represents standard deviation. g The average measured strain from 10 sensor array films (30 × 30, 100 pixel cm−2) under a uniform strain of 10%. For each film, electrical signals from 36 units were collected. The error bars represent the standard deviation from each sensor array film and SE (standard error) is calculated from the results of the 10 sensor array films. h The sensor density and gauge factor of our sensor array as compared to the previously reported ones14,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36. i The sensor density and stretchability of our sensor array as compared to the previously reported ones14,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36. Source data are provided as a Source Data file.
