The electrochemical behavior of small biomolecules such as NADH, ascorbic acid (AA), uric acid (UA) and dopamine (DA) on the as-prepared three-
dimensional monolayer was studied. The cyclic voltammetric results indicated that three-dimensional MPA monolayer promoted the
electron transfer between NADH and electrode, which was similar to two-dimensional MPA monolayer assembled on planar gold elec-
trode. However, to the electrooxidation of AA, although two-dimensional MPA monolayer exhibited a blocking effect, three-dimen-
sional MPA monolayer showed an obvious promotion. The catalytic activity of three-dimensional MPA monolayer towards UA and
DA was also observed, which was attributed to its three-dimensional structure that might effectively prevent the poison of the electrode
surface by the oxidation products.
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2006 Elsevier B.V. All rights reserved.