Single-point nano-welding method based on photothermal effect

Abstract

The invention discloses a single-point nano-welding method based on the photothermal effect. Most of existing nano-welding inventions and researches are based on large-scale nanowire networks. A continuous laser is utilized for outputting single-color laser light, the incident power of the single-color laser light is adjusted through a beam attenuator, and then a shutter is used for controlling the transit time of the single-color laser light; the single-color laser light is converted to circular polarization from linear polarization after passing a quarter-wave plate, the light is reflected by a beam splitter in an optical microscope to enter a microscope objective and then is focused at the position, to be irradiated, of a metal nano element, the metal nano element is excited to generate the photothermal effect due to the surface plasmon excimer features, and a melting or welding process occurs. By means of the single-point nano-welding method, the nano element can be rapidly assembled in a non-contact mode, the welding position can be flexibly controlled, damage to a substrate is small, and the structure expansibility in the micro-nano machining field is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of micro-nano processing, and in particular relates to a micro-nano welding method based on photothermal effect. Background technique [0002] In the field of micro-nano processing, with the advancement of advanced manufacturing technology and the innovation of analytical tools, the morphology changes of nanomaterials, especially welding phenomena, have given rise to a series of emerging applications, such as transparent conductor electrodes, thin-film solar cells, nanocatalysts, Cancer treatment, nano patterning technology, etc. [0003] Recently, E. Garnett et al. proposed that the use of tungsten-halogen lamps to irradiate silver nanowires can produce self-limited welding at the intersections of nanowires, and this welding can greatly improve the performance of transparent conductor electrodes (US Patent No. US2014 / 0090870A1). This undoubtedly provides a simple and feasible method for large-scale produ...

AI Technical Summary

Problems solved by technology

[0005] In summary, there is currently no simple, direct, and controllable method for single-point welding of nanomaterials

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