Fig. 1. (a) SEM images of AgNWs prepared using different concentrations of iron ions. (b) SEM images of AgNWs during various concentrations of chloride ions. (c) Effect of different chloride on the synthesis of AgNWs.

Fig. 2. (a) High-magnification TEM image of the as-synthesized AgNW. (b) The corresponding SAED pattern of individual nanowire. (c) HRTEM image of the AgNW. The lattice fringes are spaced 0.235 nm apart, being nearly identical with the d value of the (111) planes of fcc silver.

Fig. 3. XPS spectra of (a) pure AgNWs, and (b) dispersed AgNWs. (c) O 1s spectrum of dispersed AgNWs. (d) FTIR spectra of dispersed AgNWs, compared with pure AgNWs.

Fig. 4. SEM images of AgNW networks depositing on substrates. The different concentration of AgNW dispersion formed different densities of AgNW networks: (a) 1 mg mL―1, (b) 0.75 mg mL―1, (c) 0.5 mg mL―1, and (d) 0.25 mg mL―1.

Fig. 5. Optoelectrical property comparison of TCFs without any post-treatment between this work and the previous reports.

Fig. 6. (a) The change of the R/R0 with various bending radius. (b) The R/R0 value after high-cycle bending fatigue. Inset shows a home-made bending test device. (c) A plot R/R0 versus time in days demonstrates the stability of AgNW films.

Fig. 7. (a) Schematic illustration of the AgNW-based film heater. (b) Infrared photograph of the film heater with a uniform heat distribution.

Fig. 8. (a) Comparison of temperature of AgNW-based film heater with different sheet resistance. (b) Time-dependent temperature profiles of AgNW-based film heater (RS = 10 ohms sq―1) under diverse the input voltages.