Figure 5

(a,b) AFM images of the exfoliated Nb₂Se₉ chains, and height profiles of dashed lines: (a) without dispersant, (b) with octadecylamine. (c,d) Histograms of the diameter distribution (inset: the aspect ratio) of Nb₂Se₉ solution deposited on Si/SiO₂ wafer: (c) without dispersant, (d) with octadecylamine.