epsilon and sigma copper

Hi dears,excause,i am simulating water flow in a nanochannel with copper walls,but i

Hi dears,excause,i am simulating water flow in a nanochannel with copper
walls,but i
do not have the valules of epsilon and sigma( Ɛ & σ ) in interaction between
fcc coppers atoms in lennard jones potensial(at 300 degree of K)with respect
to
Kcal/mol and Angstrome i have these values for copper:
diameter : 2.551 A ,lattice constant:3.6147A , please answer if one knows.
please if it have a reference,note its reference.thank you very much.

have you tried something like this?

http://lmgtfy.com/?q=lennard+jones+fcc+copper+parameters

axel.