Recent progress in micro and nano-joining

Abstract

Micro and nano-joining has been identified as a key enabling technology in the construction of micromechanical and microelectronic devices. The current article reviews recent progress in micro and nano-joining. In particular, laser micro-welding (LMW) of crossed 316 LVM stainless steel (SS) wire was compared to conventional resistance microwelding (RMW) and was successfully employed in welding a Pt-Ir /SS dissimilar combination. Welding of Au nanoparticles was realized using femtosecond laser irradiation and its application in the surface enhanced Raman spectroscopy was investigated. Brazing between carbon nanotube (CNT) bundles and Ni electrodes was attained in vacuum, resulting in the development of a novel CNT filament of incandescent lamps.

Femtosecond laser welded nanostructures and plasmonic devices

“…With the brazed CNT bundles, an incandescent lamp filament can be fabricated with high light emission efficiency due to the much lower contact resistance enabled by active brazing. 23 Fusion nanowelding processes have been attempted with various heat sources, such as laser beam, 5,22 Joule heating 24,25 similar to that used in resistance welding, 1 and even a resistively heated hot stage. 26 The joint is formed by resolidification (fusion) of the molten metal at the faying surfaces produced by Joule heating.…”

Molecular Dynamics Simulation of the Effect of Carbon Nanotube Chirality on Nano-Joining with Gold Particle

“…It has the biggest spirality of all the five specimens, and the gold particle deforms most when joining with it. (5, 5) and (4,6) CNTs are armchair and armchair-like CNTs and gold particles deform less when joining with them. (1,8) and (0, 9) CNTs are zigzag and zigzag-like CNTs and gold particles deforms least when joining with them.…”

“…Thus it can be inferred from the above results that (3, 7) CNT makes gold atoms move more than others in the cross-sectional plane. (5, 5), (4,6), (3,7), (1,8), (0, 9) CNTs joints with 2 nm gold particles under 800 K. Fig. 3 The COMs of gold particle during the bonding process with different CNTs.…”

“…Properties, especially electrical properties vary a lot from CNT to CNT with different chirality parameters. 30) Five 10 nm-long CNTs (diameter all about 1 nm) with different chirality parameters of (5,5), (4,6), (3,7), (1,8) and (0, 9) are modeled respectively. The initial atom velocities are determined by the Maxwell distribution.…”

“…A common requirement for a CNT is its contact with metals to fulfill its applications in most fields, and one way to meet this requirement is nano-joining. 6) With the help of fast developing experimental techniques such as high resolution transmission electron microscopy, scanning tunneling microscopes and atomic force microscopes, it has been successful to do experiments on a single carbon nanotube (CNT). 717) Taking the advantage of in situ catalyst particles in CNTs produced by catalytic chemical vapor deposition method, 18) Asaka et al 7) soldered a CNT with a platinum coated needle tip.…”