Low-energy configurations of methoxy triethylene glycol terminated alkanethiol self-assembled monolayers and their relevance to protein adsorption

Article Abstract:

Research was conducted to examine the low-energy configurations of methoxy triethylene glycol terminated alkanethiol self-assembled monolayers and their relevance to protein adsorption. To find low-energy self-assembled monolayer configurations, the configurational space of a EG3-OMe terminated docosylthiol SAM was thoroughly explored by integrating a stochastic global search and local minimization of the static monolayer lattice energy. Results demonstrate that the origin of the gauche effect observed in poly- and oligo(ethylene glycols) is influenced by a polar environment.

Polyethers, Glycol ethers

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Molecular conformation in oligo(ethylene glycol)-terminated self-assembled monolayers on gold and silver surfaces determines their ability to resist protein adsorption

Article Abstract:

The molecular conformation of oligo(ethylene glycol)-terminated self-assembled alkanethiolate monolayers on gold and silver surfaces was investigated using infrared absorption and X-ray photoelectron spectroscopies. Molecular conformation was linked to the ability of the self-assembled monolayers to resist protein adsorption. Experimental results showed that oligo(ethylene glycol)-functionalized monolayers are resistant to adsorption of fibrinogen from a buffered solution, and this resistance is related to the molecular conformation of the oligo(ethylene glycol) moieties.

Protein conformation, Glycols, Glycols (Class of compounds)

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Structure-dependent change of desorption species from n-Alkanethiol monolayers adsorbed on Au(111): desorption of thiolate radicals from low-density structures

Article Abstract:

The desorption behavior of hexanethiol (CH3(CH2)5SH: C6) monolayer on Au(111) by using thermal desorption spectroscopy and scanning tunneling microscopy. It was observed that desorption species changes dramatically according to the coverage, which is similar to a structure change from the striped to a higher density phase. The thiolates in the striped phase desorb as thiolate radicals while those in the higher density phase desorb as disulfides.

Radicals (Chemistry)

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