Biomedical subjects

Noshir S Pesika

Publications and source records attributed to Noshir S Pesika.

2 recordsLinked to original sources

PubMed2006

Kinetics of desorption of alkanethiolates on gold.

Self-assembled monolayers (SAMs) of alkanethiols can undergo reductive desorption and oxidative re-adsorption. The Coulombic efficiency of the oxidative re-adsorption reaction is dependent on the chain length and solution pH. We show that the loss of alkanethiols from the surface after reductive desorption can be explained by a simple model that takes into account diffusion of the thiolate into the bulk solution at a rate that is determined by the bulk solubility. These results provide a quantitative basis for the determination of the loss of alkanethiols from the surface after reductive desorption.

Journal Article↗

PubMed2005

Site-selective patterning using surfactant-based resists.

Patterned SAMs of alkanethiols on gold or silver are explored as resists for electrodeposition and exhibit surprisingly rich behavior depending on the overpotential and the length of the alkane chain. At small overpotentials, SAMs are positive resists with deposition only in the surfactant-free regions. At larger overpotentials, SAMs are negative resists with preferential deposition in the SAM-modified regions. Tunable surfactant-based resists are potentially versatile tools to dictate the deposition of materials and are demonstrated as a means of creating complex, three-dimensional structures.

Journal Article↗