Fig. 1. Schematic of flexible nanoporous materials fabricated by femtosecond laser

Fig. 2. Electric field distribution and morphological changes of Ag nanowires irradiated by fs laser. (a) Electric field distribution at a single Ag nanowire (AgNW) and two crossing AgNWs; (b) SEM image of AgNWs connected to each other irradiated by moderate fs laser power; (c) SEM image of AgNWs connected to each other irradiated by excessive fs laser power

Fig. 3. SEM images of silver nanomaterials. (a) SEM image of unirradiated silver nanowires; (b)--(f)SEM images of flexible nanoporous silver materials irradiated by different laser irradiation powers of 60, 70, 80, 90, 100 mW

Fig. 4. Nanoindentation experiments of flexible nanoporous silver materials. (a) Serious of load versus depth using a Berkovich tip; (b) CLSM image of residual indentation containing the information of height; (c) CLSM image of residual indentation containing the information of color and laser light quantity information

Fig. 5. Effect of laser irradiation on crystal changes of flexible nanoporous silver materials. (a) SEM image of flexible nanoporous silver materials lifted off by FIB; (b) top view of flexible nanoporous silver materials film thinned after FIB milling; (c) cross-sectional view of flexible nanoporous silver materials; (d) TEM image corresponding to the area marked in Fig. 5(c), inset shows the corresponding FFT pattern; (e) XRD patterns of flexible nanoporous silver materials irradiated by different fs laser irradiation power; (f) grain size versus laser irradiation power of flexible nanoporous silver materials

Fig. 6. Mechanical properties of flexible nanoporous silver materials. (a) Elastic modulus versus laser irradiation power; (b) yield strength versus laser irradiation power

Fig. 7. Yield strength of nanoporous Ag materials versus grain size