Atomically precise Si(331)-(12x1) surfaces

TL;DR

This paper reports the successful preparation of nearly defect-free, atomically precise Si(331)-(12x1) surfaces, highlighting their potential as templates for self-assembled nanostructures due to their structural anisotropy.

Contribution

It presents an optimized annealing process to produce highly perfect Si(331)-(12x1) surfaces with large, defect-free areas, advancing surface reconstruction control.

Findings

Achieved near defect-free, atomically precise Si(331)-(12x1) surfaces.

Demonstrated the surface's structural anisotropy for nanostructure templating.

Extended the size of defect-free surface areas to micrometer scales.

Abstract

Si(331)-(12x1) is the only confirmed planar silicon surface with a stable reconstruction located between (111) and (110). We have optimized the annealing sequence and are able to obtain almost defect free, atomically precise surface areas approaching micrometer dimensions. The unprecedented perfection of the surface combined with its pronounced structural anisotropy makes it a promising candidate to serve as template for the growth of self-assembled one-dimensional nanostructure arrays.