Structure transformation from Sierpinski triangles to chains assisted by gas molecules.

ABSTRACT: Reversible transformations between fractals and periodic structures are of fundamental importance for understanding the formation mechanism of fractals. Currently, it is still a challenge to controllably achieve such a transformation. We investigate the effect of CO and CO₂ molecules on Sierpiński triangles (STs) assembled from Fe atoms and 4,4″-dicyano-1,1':3',1″-terphenyl (C3PC) molecules on Au surfaces. Using scanning tunneling microscopy, we discover that the gas molecules induce a transition from STs into 1D chains. Based on density functional theory modeling, we propose that the atomistic mechanism involves the transformation of a stable 3-fold coordination Fe(C3PC)₃ motif to Fe(C3PC)₄ with an axially bonded CO molecule. CO₂ causes the stru

SUBMITTER: Li C 

PROVIDER: S-EPMC10411674 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature