Nano cable composed of semimetal bismuth and metallic copper and method for synthesizing the same

Abstract

The invention discloses a nano cable consisting of semimetallic bismuth and metallic copper and a synthesis method thereof. The nano cable consists of the semimetallic bismuth and the metallic copper, wherein the semimetallic bismuth or the metallic copper is a nano core thread of which the diameter is between 20 and 170 nanometers; and a shell which is formed by the semimetallic bismuth or the metallic copper is coated on the outside of the nano core thread, and the thickness of the shell is between 10 and 80 nanometers. The method comprises the following steps: firstly, using a secondary anode oxidation method to obtain a through hole alumina template; secondly, using an electronic beam evaporation method and an electrodeposition method successively to synthesize a nano cable which consists of a bismuth core thread and a copper shell or the nano cable which consists of a copper core thread and a bismuth shell respectively; and finally, placing the through hole alumina template of which a through hole is provided with the bismuth core thread and the copper shell or the copper core thread and the bismuth shell inside into a strong alkaline solution, eroding the alumina template, and preparing the nano cable which consists of the semimetallic bismuth and the metallic copper of the bismuth core thread and the copper shell or the copper core thread and the bismuth shell. The cable has potential application prospect; and the method can manually control the outside diameter of the nano cable, the diameter of the thread core and the thickness of the shell, and can be widely usedto synthesize the nano cable by using two different materials.

Description

technical field [0001] The invention relates to a nano cable and a synthesis method, in particular to a nano cable composed of semimetal bismuth and metal copper and a synthesis method thereof. Background technique [0002] Quasi-one-dimensional nanostructured heterojunctions with unique physical properties have attracted widespread attention due to their potential applications in future nanodevices. At present, in order to explore and expand the application range of quasi-one-dimensional nanostructure heterojunctions, people have made some attempts and efforts, such as "Electrochemical method for the synthesis of metals and semimetals" in the "Chemical Communications" magazine published in January 2007 Nanowire-nanotube heterojunctions and their electrical transport properties" (Electrochemical synthesis of metal and semimetal nanotube-nanowire heterojunctions and their electronic transport properties, Chem. Commun., 2007, 1733-1735) introduced an A nano-heterojunction for...

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Problems solved by technology

However, there are deficiencies in this nano-heterojunction and its synthesis method. First, although the heterojunction is composed of metallic copper and semi-metallic bismuth, the nanotubes and nanowires are a structure in which the upper and lower nodes are docked. The contact surface of the heterojunction is too small, and it is difficult to give full play to the potential effect of the nano-heterojunction; secondly, the synthesis method can only produce the heterojunction with the upper and lower joints, and cannot produce nanotubes and nanowires. Heterojunction of covered cable structure

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