Surface Conditioning Effects on Submerged Optical Sensors: A Comparative Study of Fused Silica, Titanium Dioxide, Aluminum Oxide, and Parylene C - Archive ouverte HAL
Journal Articles Sensors Year : 2023

Surface Conditioning Effects on Submerged Optical Sensors: A Comparative Study of Fused Silica, Titanium Dioxide, Aluminum Oxide, and Parylene C

Zibin Nan
Toulouse Biotechnology Institute
Pascal Floquet
Laboratoire de Génie Chimique
Didier Combes
  • Function : Author
Toulouse Biotechnology Institute
Claire Tendero
Centre interuniversitaire de recherche et d'ingénierie des matériaux
Mickaël Castelain
Toulouse Biotechnology Institute
CV

Abstract

Optical sensors excel in performance but face efficacy challenges when submerged due to potential surface colonization, leading to signal deviation. This necessitates robust solutions for sustained accuracy. Protein and microorganism adsorption on solid surfaces is crucial in antibiofilm studies, contributing to conditioning film and biofilm formation. Most studies focus on surface characteristics (hydrophilicity, roughness, charge, and composition) individually for their adhesion impact. In this work, we tested four materials: silica, titanium dioxide, aluminum oxide, and parylene C. Bovine Serum Albumin (BSA) served as the biofouling conditioning model, assessed with X-ray photoelectron spectroscopy (XPS). Its effect on microorganism adhesion (modeled with functionalized microbeads) was quantified using a shear stress flow chamber. Surface features and adhesion properties were correlated via Principal Component Analysis (PCA). Protein adsorption is influenced by nanoscale roughness, hydrophilicity, and likely correlated with superficial electron distribution and bond nature. Conditioning films alter the surface interaction with microbeads, affecting hydrophilicity and local charge distribution. Silica shows a significant increase in microbead adhesion, while parylene C exhibits a moderate increase, and titanium dioxide shows reduced adhesion. Alumina demonstrates notable stability, with the conditioning film minimally impacting adhesion, which remains low.

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Materials Biological Physics [physics.bio-ph] Environmental Engineering
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https://cnrs.hal.science/hal-04350817

Submitted on : Tuesday, March 26, 2024-4:52:05 PM

Last modification on : Friday, May 17, 2024-4:18:03 PM

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hal-04350817 , version 1 (26-03-2024)

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Zibin Nan, Pascal Floquet, Didier Combes, Claire Tendero, Mickaël Castelain. Surface Conditioning Effects on Submerged Optical Sensors: A Comparative Study of Fused Silica, Titanium Dioxide, Aluminum Oxide, and Parylene C. Sensors, 2023, 23 (23), pp.9546. ⟨10.3390/S23239546⟩. ⟨hal-04350817⟩

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