Formation of Hydrogenated Graphene Nanoripples by Strain Engineering and Directed Surface Self-assembly

TL;DR

This paper introduces hydrogenated graphene nanoripples (HGNRs), a new class of semiconducting nanostructures formed through strain engineering and surface self-assembly, enabling tunable electronic properties and reversible phase transitions.

Contribution

It presents a novel two-step method combining strain patterning and curvature-directed self-assembly to create controllable HGNRs with tunable band gaps.

Findings

HGNRs exhibit controllable band gaps similar to graphene nanoribbons.

Reversible metal-semiconductor-metal transitions achieved through H adsorption/desorption.

The method allows precise control over nanostructure morphology.

Abstract

We propose a new class of semiconducting graphene-based nanostructures: hydrogenated graphene nanoripples (HGNRs), based on continuum-mechanics analysis and first principles calculations. They are formed via a two-step combinatorial approach: first by strain engineered pattern formation of graphene nanoripples, followed by a curvature-directed self-assembly of H adsorption. It offers a high level of control of the structure and morphology of the HGNRs, and hence their band gaps which share common features with graphene nanoribbons. A cycle of H adsorption/desorption at/from the same surface locations completes a reversible metal-semiconductor-metal transition with the same band gap.