Related Experiment Video
Updated: Feb 14, 2026
09:45
Monolayer Contact Doping of Silicon Surfaces and Nanowires Using Organophosphorus Compounds
Published on: December 2, 2013
8.0K
Surface thiolation of silicon for antifouling application
Xiaoning Zhang1, Pei Gao2, Valerie Hollimon3
1College of Biotechnology, Southwest University, Chongqing, 400715, China. XZhang@swu.edu.cn.
Chemistry Central Journal
|February 8, 2018
Summary
This study shows that perfluorodecanethiol (PFDT) coatings reduce biofouling on silicon surfaces, but performance declines over time. The coating can be removed and reapplied, restoring antifouling properties.
Area of Science:
- Materials Science
- Surface Chemistry
- Biotechnology
Background:
- Biofouling on surfaces poses challenges in various applications.
- Perfluorinated compounds offer unique surface properties.
- Thiol-grafted silicon surfaces provide a platform for functionalization.
Purpose of the Study:
- To evaluate the antifouling efficacy of perfluorodecanethiol (PFDT) coatings on silicon substrates.
- To investigate the adhesion of specific microorganisms, Botryococcus braunii and Escherichia coli, on coated surfaces.
- To explore the potential for restoring antifouling properties of aged PFDT coatings.
Main Methods:
- Preparation of thiol-grafted silicon surfaces.
- Immobilization of PFDT molecules via disulfide bond formation.
- Biofouling assays with B. braunii and E. coli.
- Microscopic analysis of cell accumulation.
- Chemical removal of fouled PFDT using TCEP·HCl solution.
Main Results:
- PFDT coatings significantly reduced the accumulation density of B. braunii and E. coli.
- Antifouling performance decreased over time.
- Incubation with TCEP·HCl cleaved disulfide bonds, removing the fouled PFDT layer.
- Surface restoration led to reduced algal cell absorption and exposed a clean silicon surface.
Conclusions:
- PFDT-coated silicon substrates demonstrate initial antifouling capabilities.
- The disulfide bond linkage allows for the removal and potential restoration of the fouled surface.
- Thiol-terminated substrates offer a strategy for reusable antifouling surfaces.
Related Concept Videos
01:30Local Anesthetics: Clinical Application as Surface, Infiltration, and Conduction Block Anesthesia
2.1K
Depending on the target organ, local anesthetics (LAs) can be administered via various routes. In surface anesthesia, LAs are applied directly to the surface of the skin or mucous membranes. It is widely used for topical skin numbing before venipuncture or minor surgical procedures. Commonly used surface local anesthetics are lidocaine or benzocaine sprays or creams. Surface anesthesia occurs within 5 minutes and lasts for about 60 minutes. One of the main disadvantages of topical anesthesia is...
2.1K
01:16Surface Tension and Surface Energy
3.3K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
3.3K
01:14Wood Surfacing
367
Wood surfacing is a critical finishing process designed to smoothen the wood surface, enhance its dimensional accuracy, and make handling safer. This process compensates for potential shrinkage during the seasoning phase by marginally increasing the wood dimensions before surfacing. It also helps correct some distortions that may occur as the wood dries.
The equipment used in the surfacing process is a plane equipped with rotating blades. This tool efficiently smoothens the wood surface and can...
The equipment used in the surfacing process is a plane equipped with rotating blades. This tool efficiently smoothens the wood surface and can...
367
01:29Area of a Surface of Revolution
74
Surfaces of revolution are formed when a two-dimensional curve is rotated around an axis, producing a three-dimensional shape. This concept is used in engineering tasks like determining the surface area of a rocket nozzle, where precise calculations are critical for applying uniform heat-resistant coatings. When a curve is revolved about the x-axis, it sweeps out a continuous surface whose area must be calculated accurately to estimate material requirements.Approximating with Conical BandsTo...
74
01:21Cell-surface Signaling
54.9K
Hormones—or any molecule that binds to a receptor, known as a ligand—that are lipid-insoluble (water-soluble) are not able to diffuse across the cell membrane. In order to be able to affect a cell without entering it, these hormones bind to receptors on the cell membrane. When a first messenger, a hormone, binds to a receptor, a signal cascade is set off, causing second messengers, proteins inside the cell, to become activated, resulting in downstream effects.
54.9K
01:23Surface Appendages of Archaea
696
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
696