Copper Nanowires as Nanoscale Interconnects: Their Stability, Electrical Transport, and Mechanical Properties

Abstract

Application of copper nanowires (Cu NWs) for interconnects in future nanodevices must meet the following needs: environmental stability and superior electrical transport properties. Here, we demonstrate a kind of Cu NW that possesses the both properties. The Cu NWs were synthesized through a hydrothermal route with the reduction of copper chloride using octadecylamine (ODA). The reasons for their environmental stability could be due to interaction of ODA(+) molecules with the surface of Cu NWs and forming strong N-Cu chemical bonds. Electrical transport properties of individual Cu NW were investigated by using the four-probe measurement, showing the temperature-dependent resistance of the Cu NW was fairly linear in the temperature range from 25 to 300 K and the Cu NW retained the low resistivity of approximately 3.5 × 10(-6) Ω · cm at room temperature, near the resistivity value of bulk copper. The maximum transport current density for the Cu NW should be superior to 1.06 × 10(7) A · cm(-2). In addition, the Cu NWs have ultralow junction resistance. The present study indicates that the Cu NWs could act as a multifunctional building blocks for interconnects in future nanoscale devices.

Tunable Mechanical and Electrical Properties of Coaxial BN‐C Nanotubes

“…Comparison of the present data with the previous reports on different materials (Au, Ag, Cu, Al, Pt, and W nanowires, CNTs, BNNTs, and SiNW) in terms of elastic moduli and electrical resistivities at room temperature (different characteristic regions are marked).…”

Tailoring the Aqueous Synthesis and Deposition of Copper Nanowires for Transparent Electrodes and Heaters

“…For metal nanowires, the junction resistance is greatly affected by the post treatments and reported in the range from 10–10 4 Ω . The interwire resistivity compares to the one for the bulk metal counterpart and is reported at ρ CuNW = 35 nΩm . Under the assumption that the diameters and the lengths of the nanowires lie in the frequently reported range d = 20−200 nm and l = 10−100 µm, the interwire resistances yield to 10−10 3 Ω .…”

Surface stress on the effective Young’s modulus and Poisson’s ratio of isotropic nanowires under tensile load

“…1,2 In the NEMS, NWs function as the mech components of sensors and actuators. Researchers have found the mechanical behavior of NWs to be size-dependent from various experiments, prominently in bending tests and tensile tests.…”