fig3

Figure 3. Two-bit electrical coding of thermally switchable GF units. (A) Schematic and photographs of 1 × 2 series-connected GF-bit units with 00, 01, 10, and 11 codes; (B and C) Strain-dependent resistance responses and extracted effective GF values of the series-connected units, showing stepwise gain modulation from 00 to mixed 0/1 and 11 states; (D) Reversible coding/readout sequence of the series-connected GF-bit unit; (E) Schematic and photographs of 2 × 1 parallel-connected GF-bit units representing the 00, mixed 01/10, and 11 codes; (F and G) Strain-dependent resistance responses and extracted effective GF values of the parallel-connected units, demonstrating electrical-topology-dependent multilevel gain coding. GF values are presented as the mean ± SD (n = 3 independently prepared two-pixel arrays). GF: Gauge factor; SD: standard deviation.