Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Atomic force microscopy (AFM) topography images of chitosan thin film over an area of 20 × 20 µm2 irradiated with fs laser at λ = 800 nm, τ = 130 fs at different I and N: (a) I = 7.9 × 1014 W/cm2, N = 1, Rrms = 0.780 µm; (b) I= 7.9 × 1014 W/cm2, N = 2, Rrms = 2. 266 µm; (c) I = 7.9 × 1014 W/cm2, N = 5, Rrms = 2. 430 µm; (d) I = 1.5 × 1015 W/cm2, N = 1, Rrms = 1.617 µm; (e) I = 1.5 × 1015 W/cm2, N = 2, Rrms = 2.272 µm; (f) I = 1.5 × 1015 W/cm2, N = 5, Rrms = 2.480 µm.
