Ion Track Technology

PhysicsConsult

Reimar Spohr

PostHeaderIcon Abstract

Copper nanowires electrodeposited in etched single-ion track templates. Enculescu, I.; Siwy, Z.; Dobrev, D.; Trautmann, C.; Toimil Molares, M. E.; Neumann, R.; Hjort, K.; Westerberg, L.; Spohr, R.. Applied Physics A: Materials Science & Processing (2003), 77(6), 751-755

The replication of single-ion track templates opens up the possibility of accessing elec. properties of nanowires without using lithog. techniques. Polycarbonate foils of 30-.mu.m thickness were irradiated with single swift heavy ions (e.g. Au 11.4 or Xe 8.3 MeV/nucleon). By controlled one-sided etching of the damage trail caused by the ion, templates contg. a single conical pore were prepd. The narrow pore openings had diams. down to 25 nm and opening angles up to 2°. By electrochem. deposition of copper, single conical wires were obtained. The elec. current recorded during electrodeposition reflects the geometry of the pore. The wires were provided with elec. contacts. Current-voltage measurements confirmed that their resistance was ohmic. The wires could withstand a max. c.d. above 108 A/cm2.