Influence of the nature of the alkanethiol terminal group on the electrochemical stability and blocking ability of self-assembled nanofilms on Au electrode

We studied the effect of nature terminal group thiols with same chain length HS (CH 2 )8 – R (R: -CH 3 , OH, -NH ) on electrodesorption behaviour well-formed SAMs (the self-assembled monolayers), their stability and blocking ability using voltammetry chronoamperometry. The functional determines surface properties SAM provides basis for subsequent interactions (for example, peptides, proteins, DNA) in order to create sensors bioagents. For thiols, hydrophilicity end groups increases series << ≤ OH; they also differ polarity possibility protonation amino group. OH groups, an increase leads formation less stable ordered films. replacement carbon by nitrogen approximately (-CH a more film consisting molecules energy state, butwith poorer insulatingproperties.