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M. Zhong and P. Fan
Fig. 2.7 a–c SEM images of surface features on copper fabricated with a scanning speed of 2000,
3000, and 5000 mm s −1 , respectively. The green arrows refer to the nanoparticles while the blue
arrows refer to the surface nanostructures. Reproduced from [54] with permission from the American
Institute of Physics
Fig. 2.8 Distribution
histograms of nanoparticles
on the ultrafast laser
nanostructured copper
surfaces. Reproduced from
[54] with permission from
the American Institute of
Physics