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Dynamic Pattern Formation in Electron-Beam-Induced Etching.

Aiden A Martin^1,2, Alan Bahm^1,3, James Bishop¹

¹School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia.

Physical Review Letters

|January 2, 2016

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Highly ordered surface patterns on diamond are created using electron-beam-induced etching (EBIE), with symmetry controlled by precursor gases. This research refines EBIE theory for advanced nano- and microscale surface texturing applications.

Area of Science:

Materials Science
Surface Science
Nanotechnology

Background:

Electron-beam-induced etching (EBIE) is a technique for surface modification.
Existing EBIE models do not fully explain observed pattern formation dynamics.

Purpose of the Study:

To investigate the formation of highly ordered topographic patterns on diamond surfaces using EBIE.
To understand the role of precursor gas species in controlling pattern symmetry and formation dynamics.
To refine EBIE theory to account for observed phenomena.

Main Methods:

Utilizing electron-beam-induced etching (EBIE) on diamond surfaces.
Controlling pattern symmetry through the selection of precursor gas species.
Analyzing pattern formation dynamics, including etch rate anisotropy and electron energy transfer.

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Main Results:

Highly ordered topographic patterns spanning multiple length scales were achieved on diamond.
Pattern symmetry was demonstrably controlled by the precursor gas species.
An etch rate anisotropy and a novel electron energy transfer pathway were identified, necessitating a modification of existing EBIE models.

Conclusions:

The study successfully demonstrates controlled surface patterning of diamond via EBIE.
Modified EBIE theory now accurately explains the observed results and is universally applicable.
The developed surface patterns hold potential for applications in controlled wetting, optical structuring, and nano/microscale surface texturing of wide band-gap materials.