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Roughness-dependent exploration strategies regulate barnacle cyprid settlement on titanium surfaces
Weixiong Zhang1, Hao Zhang1, Baiyi Chen1
1Marine Engineering College, Jimei University, China; Fujian Provincial Key Laboratory of Advanced Marine Functional Materials, Jimei University, China; Xiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Jimei University, China.
Colloids and Surfaces. B, Biointerfaces
|July 23, 2026
Summary
Titanium surface roughness affects barnacle settlement. Moderate roughness aids initial attachment and increases settlement, while excessive roughness leads to reduced exploration and a plateau in settlement rates for marine applications.
Area of Science:
- Marine Biology
- Materials Science
- Surface Chemistry
Background:
- Titanium is crucial for marine structures but suffers from biofouling.
- Understanding surface properties is key to developing effective antifouling strategies.
- Barnacle cyprid settlement is a primary concern for marine biofouling.
Purpose of the Study:
- To investigate the impact of TA2 titanium surface roughness on barnacle cyprid settlement.
- To elucidate the mechanisms by which surface roughness influences cyprid exploration and attachment.
- To provide a theoretical basis for designing antifouling titanium surfaces.
Main Methods:
- Laboratory assays examining barnacle cyprid settlement on titanium surfaces with varying roughness.
- Analysis of temporary attachment, surface exploration, and footprint protein deposition.
- Field experiments to validate laboratory findings under natural conditions.
Main Results:
- Increased surface roughness initially enhanced temporary cyprid attachment via sacrificial bonds and mechanical interlocking.
- Moderate roughness promoted surface exploration and settlement-inducing protein complex (SIPC) distribution, increasing settlement ratio.
- Excessive roughness led to localized inspection, reduced exploration, and a plateau in settlement ratio due to potential avoidance responses.
Conclusions:
- Surface roughness significantly influences barnacle cyprid exploration strategies and settlement success.
- Direct cyprid-substrate contact is essential for firm settlement, even with biofilm presence.
- Findings offer a foundation for engineering antifouling TA2 titanium surfaces for marine applications.
