SOLID STATE DIFFUSION OF SILVER NANOWIRES BY LARGE PLASTIC DEFORMATION

The conventional cold welding concept was extended to nano scale, in which silver nanowires were welded together by large plastic deformation. A nano indenter was employed as a cold welding tool to visualize and conduct welding. The MD simulation shows that unlike single crystal nanowire, sufficient plastic deformation is key to realize successful welding when the two nano objects have large orientation mismatching. The lattice orientation of the joint interface is complex but no defects were found in both experimental and simulation. SOLID STATE DIFFUSION OF SILVER NANOWIRES BY LARGE PLASTIC DEFORMATION Since interconnect formation is critical for the assembly and integration of nano components to enable nano electronics- and nano systems related applications, nano joining is currently under intensive development. The nano joining methods include laser beam, electron beam, soldering, sintering, resistance welding, and ultrasonic welding. Most of these processes are designed to make thousands of joints simultaneously.