Interfacial electrostatics of self-assembled monolayers of alkane thiolates on Au(111): Work function modification and molecular level alignments

Article Abstract:

A combination of several simulations of dimethyl disulfide (DMDS) and methylthiolate (MT) self-assembled monolayers (SAMS) on Au(111) has helped in describing the bonding between weakly adsorbed disulfides and chemisorbed thiols on gold surfaces. This analysis has clarified the role of molecular-dipole, charge-transfer, and Pauli repulsion at these interfaces, which allows for better analysis and control when designing Au(111)-thiol systems with specific interfacial electrostatic properties.

Design and construction, Monomolecular films

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Redox properties of self-assembled gold nanoclusters

Article Abstract:

The redox properties of a monolayer of alkanethiolate-protected gold nanoclusters (MPCs) constructed on a gold slide electrode was studied in 1,2-dichloroethane (DCE) electrolyte solutions. The effect of the electrostatic interaction between attached MPCs and the substrate electrode on the redox behavior of MPCs was theoretically considered in terms of the method of images in classical electrostatics and justified experimentally.

Analysis, Oxidation-reduction reaction, Oxidation-reduction reactions

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Photothermal readout of surface-arrayed proteins: Attomole detection levels with gold nanoparticle visualization

Article Abstract:

Surface-arrayed proteins are studied using mercaptoalkanoic acid coated gold nanoparticles (maa-AuNP) in order to determine the influence of AuNP diameter and acid chain length on protein staining and selectivity. It is seen that AuNP staining coupled with transverse photothermal beam reflection (tPBD) detection constitutes a sensitive and practical method for probing protein arrays.

Protein research, Nanoparticles

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