Fig. 7: Performance tests of the Pt thin films.

a Schematic diagram of the temperature–resistance test platform. b Temperature–resistance test platform built in the laboratory. c Sheet resistance and grain size D111 values of Pt thin films under different annealing temperatures. d Sheet resistance and TCR values of Pt thin films under different annealing temperatures. e–h Temperature–resistance curves and calculated TCRs of Pt thin-films annealed for 1.5 h at different annealing temperatures in air