Intercalation of methylene blue in n-alkanethiolated self-assembled monolayers: Versatile electrochemical platforms for characterizing surfactant adsorption on hydrophobic surfaces

A novel electrochemical method for determination of cis-jasmone based on enhancement effect of cetyltrimethylammonium bromide

“…It has been reported that the best result is usually obtained in the presence of CTAB instead of other cationic surfactants, including LTAB and STAB [25,26]. Here, the voltammetric response is the highest in the present of CTAB, which is consistent with previous reports and attributes to the different surface activity of these surfactants [27,28]. Considering the suitable long hydrophobic tail on CTAB, it can be more easily adsorbed on the electrode surface.…”

Rapid formation of high-quality self-assembled monolayers of dodecanethiol on polycrystalline gold under ultrasonic irradiation

“…Self-assembled monolayers (SAMs) of organothiols and disulfides on metal surfaces, especially monolayers of alkanethiols on gold, have been the subject of considerable interest [1][2][3][4]. Formation of the high-quality alkanethiolate SAMs often requires a long time of immersing the gold substrate in a thiol solution, typically one day to several days.…”

A modular electrochemical peptide-based sensor for antibody detection

“…Finally, at the same extremity, the support peptide contains also a free carboxyl group able to covalently bind the hydroxyl group from the target. Of note, the sequence of such a short support peptide has been chosen so that it can fold in a regular a-or 3 10 -helical structure. This would allow the formation of an ordered layer on the electrode surface.…”

“…Recently, Plaxco, Lai and other groups have reported the development of electrochemical peptide-based (E-PB) sensors that use short antigenic peptides as recognition elements for the detection of diagnostically relevant antibodies. 2,6,7 In these platforms the recognition peptide is usually immobilized either by direct chemisorption of a thiol-end labelled peptide onto gold surfaces 8 or by attachment on alkylthiol self-assembled monolayers (SAMs) with terminal reactive groups via a ''clickchemistry'' approach; 9 the peptides are also labelled at one end with a redox reporter, most frequently ferrocene, 4,[10][11][12] or methylene blue (MB). 2,6 Once fabricated, these E-PB sensors allow the monitoring of the target antibody in a reagentless fashion and thus appear suitable for the development of portable and easy-to-use sensors for antibody detection.…”