Localized Electrodeposition by Patterned Redox-active Monolayers

Self-assembled monolayer protection of chiral-imprinted mesoporous platinum electrodes for highly enantioselective synthesis

“…This can be ascribed to a thiol coverage limited to a confined space even when repeating the μCP several times. 25 …”

Spatial Control of Polyaniline Electrodeposition by Patterned Polyoxometalate Monolayers

“…Polymerization with PM o 12 O 40 3Ϫ .-A typical cyclic voltammetric response of an ultrathin film of PMo 12 O 40 3Ϫ on ITO consists of three well-defined reversible two-electron peaks with characteristic potentials, 16 the difference between the respective anodic and cathodic peak potentials was on the level of only a few mV. Considering the charge obtained by integrating the peaks and using the geometric surface area, an apparent surface loading of ca.…”

“…This can be achieved by a procedure involving contact printing, 37 comparable to the one recently utilized for the formation of micrometer-scale patterns of polyaniline on SAMs on functionalized alkanethiols. 28 Analogous to what has been reported elsewhere for the selective metal deposition using patterned POM layers, 16 a commercially available stamp was pressed on a tissue that had been soaked with a POM solution in 0.05 M H 2 SO 4 . As the original stamp surface is quite hydrophobic poly͑dimethylsi-loxane͒, this usually does not lead to the formation of a very homogeneous liquid film on the stamp.…”

“…[5][6][7][8][9][10] In the present work, we concentrate on the localized deposition of polyaniline ͑PANI͒, and we develop a novel method for the controlled patterning of electrode surfaces that allows selective electrochemical deposition of this model conducting polymer. [11][12][13] The formation of functionalized self-assembled monolayers ͑SAMs͒ on solid substrates provides a convenient method for the modification of their chemical and electrochemical properties with respect to the possibility of selective deposition of metals, [14][15][16] electrostatic adsorption of polymer multilayers, 17 initiation of polymerization, 18 and electro-oxidative formation of conjugated polymers. 19,20 Typically, organic monolayers, produced from functionalized long-chain alkanes that are chemisorbed on the surfaces of appropriate solid materials, have been used as platforms at which suitable interfacial chemical and electrochemical reactions can be carried out.…”

“…20 Recently, it has been demonstrated that polyoxometalates ͑POMs͒ are able to form robust, closely packed, and fairly ordered monolayer-type inorganic redox active structures on such common electrode substrates as glassy carbon ͑GC͒, indium tin oxide ͑ITO͒, silver, or gold. 16,[23][24][25][26] They can attract electrostatically a large number of positively charged inorganic and organic ions. The use of POM monolayers represents an interesting alternative to the fabrication of molecular matrices on electrode surfaces that allow control of interfacial reactions including polymerization.…”