Broadband nonlinear optical and optical limiting effects of partially unzipped carbon nanotubes

Partially unzipped carbon nanotubes can be regarded as CNT–graphene hybrids with a graphene like structure strongly attached to the intact inner walls of the nanotubes. They present a much lower F_th than graphene oxide nanosheets and carbon nanotubes at both 532 and 1064 nm, indicating a superior broadband optical limiting effect.