Fig. 1. Schematic diagram of polyaniline microstructure fabrication process

Fig. 2. Schematic diagram of femtosecond laser two-photon polymerization system

Fig. 3. SEM images of polyaniline lines with different aniline concentration. (a) Sample 1; (b) sample 2; (c) sample 3; (d) sample 4

Fig. 4. Schematic diagram of polymerization mechanism of aniline

Fig. 5. SEM images of polyaniline lines at relative concentration of 1.14. (a) Sample 5; (b) sample 6

Fig. 6. SEM image of polyaniline prepared by using sample 3 at laser power of 29mW

Fig. 7. Effect of scanning speed on polyaniline lines. (a) SEM image of polyaniline lines at scanning speed from 1 to 10μm·s^-1; (b) relationship between scanning speed and average line width of polyaniline lines

Fig. 8. FT-IR spectrum of two-photon polymerized polyaniline microstructure

Fig. 9. AFM image and result analysis of polyaniline line used for conductivity test. (a) AFM image of sample; (b) 3D AFM image of cross-section of sample; (c) height and width of sample

Fig. 10. Resistance test of polyaniline. (a) Diagram of test principle; (b) current-voltage curve measured at voltage of 1.0V and fitted curve of resistance