Steady-state and transient conductance measurements
of gold nanobeads solutions deposited on top of interdigitated
electrodes have been performed. It is shown that
the application of an electric field of moderate value between
electrodes during the drying process of the droplet makes the
resulting steady-state conductance value to increase significantly.
The dynamics of the gold nanobeads in the solution has been
studied by means of transient current measurements during the
drying process and the effects correlated to the changes in the
morphology of the association of the gold nanobeads when they
reach the substrate. It is seen that the application of the electric
field foster the formation of gold beads monolayers, chains, and
dendritic associations which, in combination with the humidity
conditions of the sample surface, are believed to be the reasons for
the conductance increase.
CitationValera, E.; Rodríguez, A.; Castañer, L.M. Steady-state and transient conductivity of collodial solutions of gold nanobeads. A: IEEE Transactions on Nanotechnology, 2007, vol. 6, p.504-508.
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