Fig. 4: Sensing performance of the 3D-printed Ca-sensor.
From: Attomolar-sensitive milk fever sensor using 3D-printed multiplex sensing structures
a Ca-sensor performance at the low concentration of Ca2+. OCP responses of the sensor were recorded in the presence of 1.0 am to 5.0 mm. The shaded areas indicate the low concentration regions of 1.0 am, 1.0 fm, and 1.0 pm, respectively, from left to right. (b) Zoom-in shows the potential response at low concentrations. c Correlation in responses of a commercial Ca-meter and 3D-printed Ca-sensor with theoretical values of Ca2+. d Ca-sensor responses with repeated high (2.0 mm) and low (0 mm) concentrations of Ca2+. OCP vs concentration plot obtained from graph along with relative standard deviation (RSD). Seven repeated measurements of high concentrations of Ca show an RSD of 1.1%. Error bars in Fig. 4d is the SD of three repeated measurements (n = 3 biologically independent experiments). Error bars, mean ± SD. DI water is utilized as the solution for establishing the sensors’ baseline. Source data are provided as a Source Data file.
