[1] Univ Aveiro, Ctr Mech Technol & Automat, P-3800 Aveiro, Portugal
[2] Univ Ulster, NIBEC, Coleraine BT52 1SA, Londonderry, North Ireland
[3] Louisiana State Univ, Ctr Adv Microstruct & Devices, Baton Rouge, LA 70806 USA
[4] Univ Paisley, Thin Film Ctr, Paisley PA1 2BE, Renfrew, Scotland
[5] Univ Texas, Arlington, TX 76019 USA
[6] Purdue Univ, Dept Mech Engn, W Lafayette, IN 47907 USA