Fig. 1
a Real-color photograph of tunable-composition ternary alloy CdS1−xSex chip and the diagram of the sweat sensor. b PL spectra measured at different composition along the length direction of the CdSSe nanowire chip by a laser at 405 nm. c Real image of the as-prepared sweat sensor. d Cross-sectional SEM image of silicon (Si) substrate based PI-coated CdSSe nanowire chip. Scale bar: 30 μm