One-dimensional pattern of Au nanodots by ion-beam-sputtering: formation and mechanism

TL;DR

This paper demonstrates the fabrication of highly ordered one-dimensional gold nanodot arrays using ion-beam sputtering, revealing the underlying mechanisms such as non-linear effects and surface transport that govern pattern formation.

Contribution

It introduces a method for creating hierarchical nanostructures with ion-beam sputtering and elucidates the key mechanisms involved in pattern formation.

Findings

Successful fabrication of ordered nanodot arrays

Identification of non-linear effects as crucial for pattern formation

Surface-confined transport preserves pattern order

Abstract

Highly ordered one-dimensional arrays of nanodots, or nanobeads, are fabricated by forming nanoripples and nanodots in sequence, entirely by ion-beamsputtering (IBS) of Au(001). This demonstrates the capability of IBS for the fabrication of sophisticated nanostructures via hierarchical self-assembly. The intricate nanobead pattern ideally serves to identify the governing mechanisms for the pattern formation: Non-linear effects, especially local redeposition and surface-confined transport, are essential both for the formation and the preservation of the pattern order.