Self-assembled monolayers of perfluoroalkylsilane on plasma-hydroxylated silicon substrates

Wu, Lin; Cai, Linlin; Liu, Anqi; Wang, Wei; Yuan, Yangsheng; Li, Zhanxiong

doi:10.1016/j.apsusc.2015.05.073

Cited by 35 publications

(15 citation statements)

References 53 publications

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“…As shown in Figure 3G, AFM‐nanoFTIR spectra reveal that the regions in‐between the bumpy aggregates (gaps) in the CVD‐treated TP layers consisted of fluorinated material, as the characteristic IR signal showed CF stretching vibrations between 1000 and 1300 cm –1 , similar to that of the large aggregates and of the neat TP obtained by far‐field FTIR. [ 34 ] In contrast, IR signal from the incompletely silanized TP layer was different to that of the neat solution, indicating that the underlying silicon wafer contributed to the signal due to a patchy TP layer.…”

Section: Resultsmentioning

confidence: 99%

Design Optimization of Perfluorinated Liquid‐Infused Surfaces for Blood‐Contacting Applications

Hong

Mathur

Ruhoff

et al. 2022

Adv Materials Inter

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Tethered‐liquid perfluorocarbon (TLP) coatings show promise for blood‐contacting medical device applications to reduce blood adhesion and delay thrombosis. However, their fabrication and longevity under external fluid flow is not well characterized. A vapor phase silanization reaction leading to the formation of tethered‐perfluorocarbon (TP) layers containing large bumpy aggregates, 300 ± 200 nm thick, on top of an underlying 35 ± 15 nm thick uniform coating is reported. The vapor phase method compares favorably to the well‐established liquid phase deposition to reproducibly create slippery coatings on silicon and polystyrene with very low water sliding angles (2° ± 1°), without the need to control humidity conditions. The TP layer retains perfluorinated lubricants up to 20 000 s–1, using a cone‐and‐plate rheometer, with the higher viscosity lubricant perfluoroperhydrophenanthrene being more resistant to depletion than perfluorodecalin. TLP infused with either of the lubricants effectively reduces adhesion of fibrin from human whole blood relative to TP and control hydrophilic and hydrophobic surfaces. The combination of highly fluorinated TP coatings grafted from the vapor phase to create nanoscale structured surfaces infused with higher viscosity lubricant may be the most suitable combination for clinical applications of liquid‐infused surfaces to reduce thrombosis in blood‐contacting medical devices under flow.

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Section: Resultsmentioning

confidence: 99%

Design Optimization of Perfluorinated Liquid‐Infused Surfaces for Blood‐Contacting Applications

Hong

Mathur

Ruhoff

et al. 2022

Adv Materials Inter

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“… The C‐F band got overlapped with other characterization peaks of polyol appeared in the same region. However, 1 H NMR studies reveal that the appearance of (Si‐OCH 3 ) proton from PFS moiety at δ 3.57 and the vicinal proton of the CF 2 group at δ 2.11 confirms the formation of FSGPT‐ACP …”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of eco‐friendly siloxane‐semifluorinated polyurethane coatings for underwater application

Sebastin

Mohanty

Nayak

2019

J of Applied Polymer Sci

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Siloxane‐semifluorinated polyurethane coatings were prepared for robust underwater application. Initially, acrylic polyol (FS‐GPTACP)‐containing fluoroalkoxysilane (1H,1H,2H,2H‐Perfluorooctyltrimethoxysilane) pendant group was synthesized by the free‐radical polymerization method. Different weight percentages of polydimethylsiloxane (0, 10, and 20 wt %) were added to the polyol to tune the mechanical and the surface energy of the coating. Subsequently, this polyol mixture was cured with 4, 4′‐methylenebis(cyclohexyl isocyanate) (H12MDI) to prepare a series of siloxane‐semifluorinated polyurethane–urea hybrid coatings (APUS 0%, APUS 10%, and APUS 20%). The synthesized coating showed low surface energy, hydrophobicity with exceptional water, and alkali resistance. Moreover, the coating displayed excellent mechanical properties with low pseudobarnacle adhesion strength. The coatings also showed nontoxicity against gram‐positive and gram‐negative bacterial strains. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47720.

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“…However, the density of reactive hydroxyl groups on the native oxide layer surface is usually low due to the condensation of silanol groups (Si-OH) to form more stable siloxane groups (Si-O-Si) over time 52 . The most effective oxidation techniques for obtaining hydroxyl groups on siliconbased surfaces are oxygen plasma 53 , piranha solution (mixture of concentrated sulfuric acid and hydrogen peroxide at ratios from 3:1 to 7:3) 54 and UV/O 3 55 , although other oxidants such as sodium hydroxide 56 , nitric acid 57 and mixtures of ammonium chloride/hydrogen peroxide and hydrochloric acid/hydrogen peroxide 58 can be employed. The silanisation procedure is carried out by immersing the hydroxylated surface into a solution of an alkyl-silane (wet chemistry method) or by exposing the surface to a stream of alkyl-silane gas generated with pressure reduction and/or heat (vapour-phase method).…”

Section: Surface Chemical Modificationmentioning

confidence: 99%

Trends in photonic lab-on-chip interferometric biosensors for point-of-care diagnostics

et al. 2016

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Self-assembled monolayers of perfluoroalkylsilane on plasma-hydroxylated silicon substrates

Cited by 35 publications

References 53 publications

Design Optimization of Perfluorinated Liquid‐Infused Surfaces for Blood‐Contacting Applications

Design Optimization of Perfluorinated Liquid‐Infused Surfaces for Blood‐Contacting Applications

Synthesis and characterization of eco‐friendly siloxane‐semifluorinated polyurethane coatings for underwater application

Trends in photonic lab-on-chip interferometric biosensors for point-of-care diagnostics

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