Ion-Surface Interaction Dynamics in Nanostructuring Applications

The interaction of energetic ions with solid surfaces underpins a growing array of nanostructuring techniques that exploit both kinetic and potential energy deposition to sculpt material features at the nanoscale. When an ion approaches a target, elastic collisions with surface atoms and inelastic processes driven by electron capture and loss govern the transfer of energy and charge. The resulting cascade of atomic displacements, localised electronic excitations and transient plasma formation can produce well-defined nanostructures, including pits, hillocks and defect distributions tailored by beam parameters. Control over ion species, charge state, energy and incidence angle, together with the choice of target material—ranging from bulk semiconductors to atomically thin two-dimensional (2D) crystals—allows precise tuning of surface modification. Advances in theoretical modelling, in situ diagnostics and layer-by-layer experiments have begun to unify our understanding of dynamic charge exchange, energy loss mechanisms and resulting morphology evolution. These insights are catalysing applications in quantum device fabrication, photonic metasurfaces and advanced depth profiling, emphasising the global significance of mastering ion-surface interaction dynamics for next-generation nanomanufacturing.

Research from Nature Portfolio

Recent studies have introduced a comprehensive kinetic model that couples dynamic charge state evolution with energy transfer in low-energy ion collisions on 2D materials. This framework predicts charge-dependent stopping powers across a range of ion species and charge states, offering reliable guidance for defect engineering in atomically thin targets. Complementary experiments have achieved monolayer-resolved observation of charge exchange by transmitting highly charged ions through successive graphene layers. By peeling graphite one layer at a time and measuring emerging charge-state distributions, researchers directly visualised the rapid electron capture and loss processes and validated a first-principles virtual-photon approach to energy transfer at sub-nanometre separations.

Ion-Surface Interaction Dynamics in Nanostructuring Applications publication trend

The graph below shows the total number of articles in ion-surface interaction dynamics in nanostructuring applications across all publications each year (not limited to Nature Index journals).

Technical terms

Kinetic energy deposition: energy imparted to lattice atoms through elastic collisions, driving sputtering and defect creation.

Potential energy deposition: energy released when a highly charged ion captures electrons upon impact, producing intense localised excitations.

Charge exchange: dynamic process of electron capture and loss by an ion as it approaches, penetrates or leaves a surface, altering its charge state.

Sputtering yield: the average number of target atoms removed per incident ion, a key metric for material erosion efficiency.

Two-dimensional (2D) materials: atomically thin crystals, such as graphene, that permit layer-specific studies of ion interactions with monolayer precision.

References

1. Charge‐State‐Enhanced Ion Sputtering of Metallic Gold Nanoislands. Small (2023).
2. The charge exchange of slow highly charged ions at surfaces unraveled with freestanding 2D materials. Surface Science Reports (2022).
3. Unraveling energy loss processes of low energy heavy ions in 2D materials. Communications Physics (2019).
4. Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid. Communications Physics (2021).