Plasmonic-enhanced targeted nanohealing of metallic nanostructures

Abstract

Healing defects of metallic structures is an essential procedure for manufacturing and maintaining integrated devices. Current nanocomposite-assisted microhealing methodologies are inadequate for nanoscopic applications because of their concomitant contamination and limited operation accuracy. In this paper, we propose an optically controllable targeted nanohealing technique by utilizing the plasmonic-enhanced photothermal effect. The healing of nanogaps between two silver nanowires (NWs) is achieved by increasing the incident laser power in steps. Partial connection of NWs can be readily obtained using this technique, while near-perfect connection of NWs with the same crystal orientations is obtained only when the lattices on the two opposing facets are matched after recrystallization. This non-contaminating nanohealing technique not only provides deeper insight into the heat/mass transfer assisted by plasmonic photothermal conversion in the nanoscale but also suggests avenues for recovering mechanical, electronic, and photonic properties of defected metallic nanodevices.

Temperature Driven Phase Transition at the Antimonene/Bi2Se3 van der Waals Heterostructure

“…5(a)). This stepwise process predicts a higher barrier than that reported elsewhere (250 eV/atom) for a single step pathway of hole-doped antimonene, 13 but is similar to that predicted for the transition from black to blue phosphorene (480 meV/atom). 33 A lower energy transition pathway was identified, however, which is far more complex.…”

“…Furthermore, the estimated electronic gap of the α phase is much lower than that of the β allotrope, although its value is still under debate. [10][11][12][13] α-Sb also exhibits a high carrier mobility 12,14 and is predicted to be an excellent absorber in the visible range. 15 Such a wealth of properties needs to be preserved when dealing with a supporting substrate.…”

“…[17][18][19][20][21][22][23][24][25] Much less has been done, however, to try to control and possibly induce a structural transition from one allotrope to the other. For instance, driving mechanisms such as electrostatic doping, molecular adsorption and the use of graphene as a supporting substrate 13 were proposed, but no experimental counterpart has been reported.…”

Overview of Laser Applications in Manufacturing and Materials Processing in Recent Years

“…Laser joining of heterostructured nanomaterials: Nanojoining of heterostructured materials to form good interfaces between 2D crystals, nanowires, and nanoparticles has become important in many applications in electronics, optoelectronics, and plasmonics. An optically controllable targeted nanohealing technique has been developed by utilizing the plasmonic-enhanced photothermal effect [412], by which the nanogaps between two silver nanowires (NWs) is healed by incident laser irradiation. A low-cost method [413] for welding semiconductors and metal nanowires (NWs) has been developed utilizing a plasmon-enhanced photothermal effect, by which different types of heterojunction-based (single Schottky junction and back-to-back Schottky junctions) electronic nanodevices can be fabricated by welding various combinations of silver and ZnO NWs on two gold electrodes using continuous wave laser (λ = 532 nm) shots.…”

Femtosecond laser-induced non-thermal welding for a single Cu nanowire glucose sensor

“…Femtosecond laser joining and laser-healing of cutting wires show epitaxial recrystallization or enhanced grain orientation. 50,54,55 Therefore, the nanojoining quality can be feasibly improved through precise control of laser parameters based on the understanding of the interaction of the laser and NWs.…”