fig7

Figure 7. Temperature sensors designed and prepared using the LMs. (A i) Photograph of the printed thermocouple prepared using Ga with 0.25 wt.% oxides- GaIn_21.5 with 0.25 wt.% Ga oxides, and the thin film thickness is about 50 μm; (A ii) Schematic diagram of a printable tiny thermocouple prepared by LMs; (A iii) The measured thermoelectric voltage as a function of temperature difference using the thermocouple in (A i). Reproduced with permission^[123]. Copyright 2012, AIP publishing; (B i) Schematic of a handy micro-thermocouple, two poles of the channel are filled with EGaInSn and Bi-based metal-alloy mixture, respectively; (B ii) The EGaInSn and mixture converged at the middle of the channel; (B iii) Performance of the thermocouple in (B i). Reproduced with permission^[124]. Copyright 2019, Multidisciplinary Digital Publishing Institute. EGaIn: Eutectic Ga-In; Ga: gallium; PDMS: polydimethylsiloxane.