User:Laura Flynn/Notebook/Experimental Biological Chemistry/2011/10/11

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The goal of this experiment is to test the conductivity of MBP protein fibers containing AuNPs was tested using electrodes and a four point probe.


  • A Teflon surface was obtained and a conductive epoxy was applied.
  • Palladium wire was placed on the epoxy.
  • Palladium foil was placed on top of the wire and epoxy.
  • The protein fibers containing Gold Nanoparticles were placed across the foils.
  • In Method 1, the areas of Palladium foil used were 35.20 mm2, 41.16 mm2, 40.18 mm2, 38.64 mm2.


  • Method 1 was not successful as the set up did not dry overnight.

The resulting probe is as pictured:

4-point probe.jpg


The key advantage of four-terminal sensing is that the separation of current and voltage electrodes eliminates the impedance contribution of the wiring and contact resistances.