Chiraltube, rolling 2D materials into chiral nanotubes

Area of Science:

• Materials Science
• Computational Chemistry
• Nanotechnology

Background:

• Carbon nanotubes (NTs) are 1D materials derived from rolled graphene sheets, with properties dictated by their chirality.
• The synthesis of NTs from diverse 2D materials beyond graphene is challenging due to difficulties in generating atomic coordinates, especially for non-hexagonal lattices.
• Existing methods struggle with multi-layered materials and complex chiral structures.

Purpose of the Study:

• To introduce Chiraltube, an open-source Python code for generating complete chiral nanotubes from any 2D material's unit cell.
• To provide the theoretical framework and generalize concepts for constructing both carbon and non-carbon-based NTs.
• To demonstrate the code's utility through examples and initial analyses.

Main Methods:

• Development of an open-source Python code, Chiraltube.
• Generalization of chiral and achiral nanotube construction principles to arbitrary 2D materials.
• Generation of atomic coordinates for NTs from 2D material unit cells.

Main Results:

• Successful generation of chiral NT structures from phosphorene, MoS2, and Ti3C2.
• Analysis of interatomic distortions in the outermost NT layers.
• Initial ab initio electronic structure calculations on phosphorene NTs demonstrating practical utility.

Conclusions:

• Chiraltube facilitates the rapid creation of diverse chiral nanotubes from various 2D materials.
• The code enables the exploration of novel 1D nanomaterials and their properties.
• Further development and application of Chiraltube are expected to advance nanomaterial research.