Method for manufacturing Ag/C nano interconnecting wire in coaxial-cable structure

Abstract

The invention discloses a Ag / C nano interconnecting wire in a coaxial-cable structure and a method for manufacturing the Ag / C nano interconnecting wire in the coaxial-cable structure. The method is based on the one-step hydrothermal reaction, glucose serves as a reducing agent and a carbon source, cetyltrimethyl ammonium bromide (CTAB) serves as a morphological control agent for metallic silver growth, and the best reaction time is in the range of 4-8h. A product is composed of Ag nano wires (cores) with diameters of 30+ / -5nm and surface nano carbon layers (shells), and the length can reach hundreds of micrometers; cross section appearances, dimensions and thicknesses (10-120nm) of carbon coating layers of the core Ag wires are controllable. Prevention of oxidization and corrosion of the nano silver cores is facilitated by carbon coating, so that the chemical reactivity and the heat stability of the nano silver cores are improved. According to the manufacturing method, no template is required, large-scale manufacturing of the interconnecting wires is achieved in one step, and the defects that other template methods (such as electrochemical deposition and chemical vapor deposition) are complicated in step and expensive in price are overcome. Besides, according to the method, devices are simple, the controllability is good, large-scale production can be achieved easily, and the method can be popularized to controllable manufacturing of other metal / carbon nano functional materials in the coaxial-cable structures.

Description

technical field

[0001] The invention relates to a metal interconnect nanowire applied to a micro-device and a preparation method thereof, especially an Ag / C nanowire with a coaxial cable structure and a length of up to hundreds of microns (the Ag wire is the core, and the carbon coating is the shell. ) preparation method. Background technique

[0002] Metal nanowires have become the focus of extensive research in the world because of their broad application prospects in micro-devices. They are often used as interconnect materials and functional building blocks in electronic, optical, and nanosensing devices. They are also the materials of choice for studying the dimensionality and size dependence of the electrical and thermal transport behavior of small-scale metallic materials. However, nanowires are prone to oxidation and performance failure due to their high specific surface area. Experiments have confirmed that bare metal (such as germanium, molybdenum, silver, copper...

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