Grafted Self-Assembled Monolayers Derived from Naturally Occurring Phenolic Lipids

Abstract

Self-assembled monolayers grafted onto silicon surfaces were obtained from the hydrosilylation products by trialcoxysilanes of naturally occurring phenolic lipid allyl ethers. The as-obtained materials were characterized by various physical and physicochemical methods. Thus, contact angles of water drops showed that they possess very high hydrophobicity. Their excellent regularity was corroborated by AFM microscopy. The frequencies of the stretching CH2 infrared modes indicate the presence of alkyl chains mainly in the trans/trans conformation. Additionally, optical ellipsometry and quartz microbalance measurements enabled us to estimate the thickness of the films. The results, as a whole, are in good agreement with the formation of densely packed monolayers.

Functionalized Hydrogen-Bonding Self-Assembled Monolayers Grafted onto SiO2 Substrates

“…Biological applications are strongly dependent on the surface properties of SAMs, including wetting and adhesion. These properties are essentially determined by the terminal functional groups present at the SAM-air interface, by the composition of the monolayers, and by the packing properties. − …”

Route to Smooth Silica-Based Surfaces Decorated with Novel Self-Assembled Monolayers (SAMs) Containing Glycidyl-Terminated Very Long Hydrocarbon Chains

“…When they contain a long, linear hydrocarbon chain, these precursors lead to well ordered SAMs, providing molecularly defined platforms for the control of the surface chemistry of materials. Hence, they offer new possibilities in various fields ranging from molecular electronics to biomedicine and catalysis. ,− Various reports have pointed out the crucial role of the molecular structure of precursors on self-assembly, and it has been demonstrated that the chain length determined the formation of high quality SAMs. − The mechanism of monolayer formation is very dependent on experimental parameters such as water content and temperature. Thus, an island-growth mechanism predominates below a critical temperature, close to 20 °C for octadecyltrichlorosilane (OTS), whereas a homogeneous deposition mechanism takes place above the critical temperature. ,,, A mixed regime may occur at intermediate temperatures, and it has been postulated that the molecules can migrate at the surface.…”

Solvent‐induced self‐assembly in cardanol‐based urethane methacrylate comb polymers

“…Cardanol resulting from the distillation of cashew nut shell liquid (CNSL), an abundant raw material issued from Anacardium Occidentale ,24–26 is a mixture of four components possessing nearly the same structure, with linear C 15 hyrocarbon chains in the meta position, which differ from one another by the number and position of the double bonds 27. This crude mixture upon purification by double vacuum distillation yields only a monoene meta ‐substituted phenol 28, 29.…”