What's the difference about different electrode element ?

[fangyongxinxi]

Dear Sr,
     I want to get the I-V of Cu nanowire, my question is I should set the Cu or Au as the electrodes ?  Au electrodes were mentioned in some articals, but Cu is not. What is the difference ?

[fangyongxinxi]

Dear Sir 

[Nordland]

If you want to know the pure transport properties of an Cu wire, you should use a Cu electrode.

If you have a Au electrode, the effect between the Au/Cu becomes important, and will to a large extend
determine the transport properties of the Cu wire.

Only guessing, I would say that you should use Cu wire for modelling the system, however I think that all real life experiments will properly have Au electrodes.

[zh]

The choice of electrode depends on what you are interested in and what you do want to simulate, and it is not determined by the popular choice in literature.

Once the electrode is chosen, the important issue is about the coupling of conductor and electrode, or their interface.