Evaluation of Electrochemical Release of Self-Assembled Reagents as a Component of a Preconcentrator for Flow-Injection Analysis

Voltammetry of the Reductive Desorption of Thiol Self‐assembled Monolayers from Electrode Surface

“…Several variants of the selective desorption technique has been reported for preparing nanopores in an SAM [60], oligonucleotide attachment and DNA hybridization [62], selective immobilization of enzymes [63,112], controlled release of biological cells [65], and trace analysis [64,113,114]. (Fig.…”

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The voltammetry of the reduction desorption of organothiolate molecules in a self-assembled monolayer on a metal surface, first reported by Porter and his coworkers [1,2], has been widely used for diagnosing the adsorbed state of the self-assembled monolayer (SAM) and for nanometer-scale engineering of SAMs [55][56][57][58][59][60][61][62][63][64][65]. When the electrode covered with a single-component SAM of a thiol derivative is cathodically polarized, typically in an aqueous alkaline solution, a single peak or more complicated multiple peaks appear on the voltammogram.

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Dependence of the redox reaction of cytochromecon the mixing state of binary self-assembled monolayers composed of 11-aminoundecanethiol and 10-mercaptoundecanoic acid on Au(1 1 1)

“…A simple coadsorption of the two thiols gives rise to a homogeneously mixed binary SAM at a molecular level [31]. To change the two-dimensional distribution of charged alkanethiolates, we used the electrochemical replacement method [32], which has been used for preparing artificially phase-separated SAMs having domains size in nanometerscale [33][34][35][36][37][38][39][40][41]. We show that the two-dimensional distribution of the charged thiolates can be controlled by varying the structure of the binary SAMs from molecular-to nanometer-scale, and that the binary SAMs having two distinct types of nanometer-scale domains of AUTe and MUAe can be used for selective immobilization of cyt c for studying the ET between cyt c and the underlying electrode.…”