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Direct Microscale Periodic Surface Structuring on Zinc-Blende Crystal Semiconductor via a Facile Cracking Method.

Bikesh Gupta¹, Hyeonsu Son², Taeyong Chang³

¹Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra 2600, Australia.

ACS Applied Materials & Interfaces

|July 4, 2025

Summary

Controlled cracking creates V-shaped grooves on GaAs, offering a cost-effective alternative to photolithography for microscale surface structuring. This method precisely controls groove morphology, impacting optical and wetting properties for optoelectronics applications.

Keywords:

anisotropic wettability fracture gallium arsenide spalling surface structuring

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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

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Published on: August 16, 2018

Area of Science:

Materials Science
Semiconductor Physics
Surface Engineering

Background:

Traditional semiconductor surface structuring relies on expensive photolithography and etching.
Developing cost-effective and efficient methods for microscale surface patterning is crucial for advanced applications.

Purpose of the Study:

To introduce a novel microscale periodic surface structuring method for GaAs substrates using controlled cracking technology.
To investigate the influence of process parameters on the morphology of V-shaped groove structures.
To explore the optical and wetting properties of the resulting structured surfaces.

Main Methods:

Controlled cracking technology utilizing a tensile-stressed Ni stressor layer on (100)-oriented GaAs.
Systematic variation of Ni stressor layer thickness to control groove morphology (pitch, amplitude, inclination angle).
Density Functional Theory (DFT) calculations to analyze fracture mechanics and energy release rates.
Optical simulations to determine the impact of groove geometry on optical reflection.
Anisotropic wetting property measurements on structured GaAs surfaces.

Main Results:

Direct formation of highly periodic V-shaped groove structures on GaAs without photolithography.
Precise control over groove morphology achieved by adjusting Ni stressor layer thickness.
DFT calculations provided insights into fracture mechanisms.
Optical simulations revealed inclination angle as the primary factor affecting optical reflection.
Observed pronounced anisotropic wetting properties, enhanced with larger groove dimensions.

Conclusions:

Controlled cracking offers a cost-effective and efficient alternative to traditional patterning techniques for GaAs surface structuring.
The method enables precise control over V-shaped groove morphology, influencing optical and wetting characteristics.
The developed technique holds significant potential for applications in optoelectronics and wetting-related technologies.