Alkanethiol Reductive Desorption from Self-Assembled Monolayers on Gold, Platinum, and Palladium Substrates

2007 ◽  
Vol 111 (34) ◽  
pp. 12804-12810 ◽  
Author(s):  
James A. Williams ◽  
Christopher B. Gorman
Keyword(s):  
Self Assembled Monolayers ◽  
Reductive Desorption ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Gold Platinum

Electrochemical Release of Immobilized IgG Protein

2007 ◽  
Vol 1010 ◽  
Author(s):  
Tanveer Mahmud ◽  
Wojtek Wlodarski ◽  
Arnan Mitchell ◽  
Sally Gras ◽  
Adrian Trinchi ◽  
...  
Keyword(s):  
Fluorescence Microscopy ◽  
Self Assembled Monolayers ◽  
Protein Molecules ◽  
Reductive Desorption ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Coated Surfaces ◽  
Phosphate Buffered Saline ◽  
Covalent Interactions ◽  
Programmed Release

AbstractIn this paper, we present the electrochemically programmed release of immobilized IgG protein molecules that have been attached to gold coated surfaces via a thiol-gold linkage. Fluorescence microscopy has been used to image the release of fluorescently tagged IgGs in phosphate buffered saline. In this technique, the reductive desorption of self-assembled monolayers is employed for the release of proteins, which are immobilized on the surface either by non-covalent or covalent interactions. The voltage applied for the release of proteins is in a range of -1.5V to -60V.

scholarly journals Effects of Introducing 2-aminoethanethiol into 4-pyridineethanethiol Self-assembled Monolayer Applicable to Enhance Sensitivity of Hg(II) Electrochemical Analysis

2015 ◽  
Vol 18 (4) ◽  
pp. 207-212 ◽  
Author(s):  
P. H. Phong ◽  
D. T. Huyen ◽  
N. H. Anh ◽  
V. T.T. Ha
Keyword(s):  
Differential Pulse ◽  
Electrochemical Analysis ◽  
Self Assembled Monolayers ◽  
Self Assembled Monolayer ◽  
Au Nps ◽  
Reductive Desorption ◽  
Assembled Monolayers ◽  
Pulse Voltammetry ◽  
Self Assembled ◽  
Optimized Conditions

In our work, enhancement of sensitivity of Hg(II) determination by introducing 2-aminoethanethiol (AET) from solutions into the self-assembled monolayers (SAMs) of 4-pyridineethanethiol (PET) on gold nanoparticles (Au-NPs) capped on glassy carbon electrode was studied. The formation of binary SAMs was indicated by the shift of reductive desorption peak to negative potentials in voltammograms recorded in 0.5 M KOH solution. Effects of introduction AET were monitored by FTIR that there was a rapid increase of intensities at bands of 1296 and 1189 cm-1 ascribed to (C-H) ring deformation and (C-N) ring stretching, respectively, with increasing immersion time. However, these bands became lower with prolonging more time as well as increasing the concentration of AET in solution. These effects were interpreted due to the conformation of pyridine ring and formation of intermolecular hydrogen bonding between PET and AET. The differential pulse voltammetry for reoxidation of Hg(0) showed the increase of peak current induced by the first effect, whereas the later caused the decrease. Since the optimized conditions, the detection limit for the binary SAMs could approach to 3.85 × 10-12 M Hg(II), approximately three times lower than that of PET SAM.

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