Graphene-like nanoribbons periodically embedded with four- and eight-membered rings.

ABSTRACT: Embedding non-hexagonal rings into sp²-hybridized carbon networks is considered a promising strategy to enrich the family of low-dimensional graphenic structures. However, non-hexagonal rings are energetically unstable compared to the hexagonal counterparts, making it challenging to embed non-hexagonal rings into carbon-based nanostructures in a controllable manner. Here, we report an on-surface synthesis of graphene-like nanoribbons with periodically embedded four- and eight-membered rings. The scanning tunnelling microscopy and atomic force microscopy study revealed that four- and eight-membered rings are formed between adjacent perylene backbones with a planar configuration. The non-hexagonal rings as a topological modification markedly change the electronic properties of the

SUBMITTER: Liu M 

PROVIDER: S-EPMC5381008 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature