Figure 3.

SEM micrographs: (a) as-fabricated TOF by flame-brushing technique, (b) functionalization of TOF by drop-casting, (c,d) drop-casting and radiation laser at 980 nm and 1550 nm, respectively. The diameter of TOF correspond to 3 $\mathsf{\mu }$m, 5 $\mathsf{\mu }$m, 3 $\mathsf{\mu }$m and 3.5 $\mathsf{\mu }$m, respectively.