Figure 2
From: Nanotag luminescent fingerprint anti-counterfeiting technology
Microscopic images of p6P nanofibre. (a) Epifluorescence image (365-nm UV excitation) of an isolated p6P nanofibre. (b) AFM image of the same fibre, denoting typical dimensions: width, 550 nm; height, 50 nm; and length, 25 μm. Inset: AFM image of an individual fibre. Note the breaks along the fibres' long axis as well as the characteristic step edges, which indicate the crystalline nature of the material.