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Volume 4
Nano Research & Applications
ISSN: 2471-9838
JOINT EVENT
October 04-05, 2018 Moscow, Russia
&
2
nd
Edition of International Conference on
26
th
International Conference on
Advanced Nanotechnology
Materials Technology and Manufacturing Innovations
Advanced Nanotechnology 2018
& Materials-Manufacturing 2018
October 04-05, 2018
Page 30
Zbigniew Jan Stojek
University of Warsaw, Poland
Zbigniew Jan Stojek, Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C5-020
Modification of electrodes with a thin film of environmentally sensitive gel to get micro and
nano electrode-array behavior
P
olymer layers were frequently deposited on electrode surfaces to achieve their desired electrochemical and
physicochemical properties. A new trend appeared recently. It is the formation of the so-called intelligent
interfaces. They can be obtained by the deposition of a thin layer, on the electrode surface, of a hydrogel that is
environmentally-sensitive. This procedure was used to build and develop sensors, biosensors, fuel cells, switchable
ON-OFF electrodes, and memimpedance systems. It is well known that in a non-conductive, porous layer that
is deposited on the electrode surface, the transport of an electroactive molecule to that surface proceeds rather
through the gel channels. In parallel, it was reported; that in the case of non-electro active layers it was possible
to obtain very different voltammetric responses. The type of response depended on the structure of the layer
and the rate of the potential sweep. In this work, we report the results obtained with electrodes modified with a
very thin layer of environmentally sensitive hydrogel. Two methods were used in the preparation of the layers:
electrochemically induced polymerization and self-assembling of nano/microgel spheres. The main component
of the gels was poly (N-isopropylacrylamide). In the second method, the crosslinkers containing the –S-S- groups
were added to the initial mixture of the monomers. Both: swollen or shrunken states of the hydrogel layers were
employed in the investigation of the transport of an external redox probe. Depending on the scan rate and the state
of the film the voltammetric behavior resembled that of a set of nano/micro-electrodes or that of linear diffusion.