Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...

34 OPTOINFORMATICS’05
VR = R * S / L (1)
Where:
VR = resistivity <strong>of</strong> volume (Ohm.cm)
R = resistance <strong>of</strong> the material to the flow <strong>of</strong> load (Ohm)
S = surface <strong>of</strong> the electrode (cm 2 ) defined like S = W * t
L = distance between electrodes (cm)
Figure 1. Volume resistivity
technique <strong>of</strong> two points
The test was realized <strong>of</strong> resistivity <strong>of</strong> volume for 5 different types <strong>of</strong> concentrations
solution, spilling in our model 4ml <strong>of</strong> solution for every test. For the measurement <strong>of</strong> the
resistivity <strong>of</strong> volume for every solution, we use 3 different types <strong>of</strong> electrodes, tin (Sn),
copper (Cu) and aluminium (Al). Obtaining 10000 readings in real time for every test,
hereby to be able to observe the change and the evolution <strong>of</strong> the conductive polymer with
regard to the resistivity in the time.
Of the results obtained in the graphic 1 it was possible to observe that the resistivity
<strong>of</strong> the polymer with tin electrodes presents the reaction named oxide - reduction with major
stability, figure 2 (acceptance and not so changeable donation <strong>of</strong> electrons) [5] .
Figure 2. Resistivity <strong>of</strong> the polymer with tin
electrodes and reduction with major stability
In general we can observe <strong>of</strong> 6 graphs that there is major stability for the majority <strong>of</strong>
the solutions and minor values <strong>of</strong> resistivity for the case without dampness.
In the development <strong>of</strong> this process for the present time we can say that the dampness
is a determinant factor in the resistivity <strong>of</strong> the polymer, as what it is necessary to have
major control on this one. We realize storage <strong>of</strong> holograms with the NiCl 2 , changing the
process <strong>of</strong> polymerization and time <strong>of</strong> treated. In the Figure 3, shows the curves <strong>of</strong>
diffraction efficiency obtained up to the moment.
Figure 3. Curves <strong>of</strong> diffraction efficiency with NiCl 2
1. Available< htttp://www.clariant.com/corporate/internet.nsf/direct/homeopendocument>.
2. Available.
3. B. Ruiz-Limón, Arturo Olivares Pérez, F Silva Andrade, I Fuentes Tapia, Juan Carlos Ibarra
Torres, “Polyvinyl alcohol doped with nickel chloride hexahydrate as conductor polymer”,
SPIE, Vol. 5351.
4. Available .
5. John R Dyer, “Aplicaciones de espectroscopia de absorción en compuestos orgánicos”, first
Ed. Prentice Hall Internacional, New Jersey USA, 1973.