Off-Stoichiometry Thiol-Ene (OSTE) Micro Mushroom Forest: A Superhydrophobic Substrate

Area of Science:

• Materials Science
• Surface Engineering
• Nanotechnology

Background:

• Superhydrophobic surfaces offer resistance to corrosion and fouling, with applications in fluid control.
• Conventional fabrication methods often rely on top-to-bottom approaches, altering surface energy or topology.
• Existing mechanical methods for superhydrophobic surface fabrication can be complex and limited in scope.

Purpose of the Study:

• To introduce a novel bottom-to-top fabrication method for superhydrophobic substrates.
• To utilize polymer OSTE (Oligothiophene) for creating micro-structured surfaces.
• To demonstrate the efficacy of a new fabrication technique for advanced material properties.

Main Methods:

• Developed a bottom-to-top fabrication scheme using polymer OSTE.
• Employed a two-step lithography process involving pillar forest and backside lithography.
• Created a micro mushroom forest structure on the OSTE substrate.

Main Results:

• Achieved superhydrophobic properties with a water contact angle of 152.9 ± 0.2°.
• Demonstrated a low sliding angle of 4.1° and contact angle hysteresis below 0.5°.
• Fabricated OSTE micro mushroom structures exhibiting excellent water repellency.

Conclusions:

• The novel bottom-to-top fabrication method using OSTE is effective for creating superhydrophobic surfaces.
• The fabricated micro mushroom structures possess desirable properties for superhydrophobic applications.
• This technique shows significant potential for advancing superhydrophobic material development in engineering.