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Controllable preparation method of monocrystal copper nanowires

A technology for copper nanowires and nanowires is applied in the field of controllable preparation of high-yield single crystal copper nanowires by liquid-phase reduction, and can solve the problems of high preparation cost, poor uniformity and controllability, and complicated processes of copper nanowires, and achieves The effect of cheap raw materials, good uniformity and simple process

Inactive Publication Date: 2014-04-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the current disadvantages of copper nanowire preparation, such as high cost, low yield, complicated process, poor uniformity and controllability, nonlinear morphology of copper nanowire and polycrystalline structure, etc., thereby providing a low-cost Preparation method of single crystal copper nanowires with high yield, simple process, relatively uniform length and diameter and controllable

Method used

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  • Controllable preparation method of monocrystal copper nanowires

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Embodiment 1

[0028] Determine the Cu(NO 3 ) 2 , EDA, NaOH, H 2 NNH 2 The concentrations are 5.3mM, 0.16M, 8.3M, 68.8mM respectively, the total volume of the mixed solution is selected to be 30ml, and Cu(NO 3 ) 2 Solid and NaOH solid were dissolved in a certain amount of deionized water respectively, and ethylenediamine and hydrazine hydrate were measured and dropped into Cu(NO 3 ) 2 solution and NaOH solution and stir well, cover them and place them in a 60°C water bath for 10 minutes, then transfer them to a glass reactor, and add deionized water dropwise to make the total volume of the solution 30ml, shake well Cover the back and place it in a water bath at 60°C for a heating reaction for 2 hours, then fish out the flaky copper nanowires floating on the upper layer of the solution, wash them with deionized water and absolute ethanol for more than three times in turn, and store them at room temperature and under the protection of Ar gas. After drying for 4 hours, single crystal copp...

Embodiment 2

[0030] Determine the Cu(NO 3 ) 2 , EDA, NaOH, H 2 NNH 2 Concentrations of the solutions are 5.3mM, 0.14M, 8.3M, 8.6mM respectively, and the total volume of the mixed solution is selected to be 30ml. Weigh Cu(NO 3 ) 2 Solid and NaOH solid were dissolved in a certain amount of deionized water respectively, and ethylenediamine and hydrazine hydrate were measured and dropped into Cu(NO 3 ) 2 solution and NaOH solution and stir well, cover and heat in a 60°C water bath for 15 minutes at the same time, then transfer them to a glass reactor, and add deionized water dropwise to make the total volume of the solution 30ml, shake well Cover the back and place it in a water bath at 60°C for a heating reaction for 2 hours, then fish out the flaky copper nanowires floating on the upper layer of the solution, wash them with deionized water and absolute ethanol for more than three times in turn, and store them at room temperature and under the protection of Ar gas. After drying for...

Embodiment 3

[0032] Determine the Cu(NO 3 ) 2 , EDA, NaOH, H 2 NNH 2 The concentrations are 5.3mM, 0.03M, 13.3M, 8.6mM respectively, the total volume of the mixed solution is selected to be 30ml, and Cu(NO 3 ) 2 Solid and NaOH solid, respectively, were dissolved in a certain amount of deionized water. Measure ethylenediamine and hydrazine hydrate, drop into Cu(NO 3 ) 2 solution and NaOH solution and stir well, cover them and place them in a 50°C water bath for 12 minutes, then transfer them to a glass reactor, and add deionized water dropwise to make the total volume of the solution 30ml, shake well Cover the back and place it in a water bath at 50°C for a heating reaction for 2 hours, then fish out the flaky copper nanowires floating on the upper layer of the solution, wash them with deionized water and absolute ethanol for more than three times in sequence, and store them at room temperature and under the protection of Ar gas. After drying for 2 hours, single crystal copper na...

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Abstract

The invention relates to a preparation method of copper nanowires and in particular relates to a controllable preparation method of high-yield monocrystal copper nanowires in a liquid-phase reduction manner. The controllable preparation method comprises the steps: firstly, mixing a divalent metal copper salt solution and ethylenediamine, and heating in a water bath to form a single and stable copper ion chelate compound; mixing a strong base solution with hydrazine hydrate, and preparing a reducing agent in the water bath at the same temperature; then transferring the two mixture solutions into a reaction vessel, fully stirring to reach a uniform state, covering well, and placing in the water bath at the same temperature for heating reaction to prepare the copper nanowires; and fishing out flaky copper nanowires floating on the upper layer of the solution, washing the flaky copper nanowires with deionized water and absolute ethyl alcohol in sequence three times, and drying at room temperature under an Ar gas protection condition to prepare the copper nanowires. The controllable preparation method provided by the invention has the advantages of simple process, low cost and high yield, and the prepared copper nanowires are of monocrystal structures, and have relatively smooth surfaces, uniform radial thickness, and controllable and more uniform length and diameter.

Description

technical field [0001] The invention relates to a method for preparing copper nanowires, in particular to a method for liquid-phase reduction controllable preparation of high-yield single-crystal copper nanowires. Background technique [0002] As a typical quasi-one-dimensional nanomaterial, due to its small size effect and structural anisotropy, nanowires exhibit many physical and chemical properties different from traditional bulk materials; among many nanowires, metal Due to its metallic properties, nanowires have potential application prospects as building units of micro / nano devices and connecting materials between units. Since copper has better conductivity and anti-electromigration properties than aluminum, it is beneficial to increase the operating frequency of the device. And allow a higher density of current to pass (see literature: 1. Hwang S T, Shim I, Lee KO, et al. J Mater Res, 1996, 11: 1051-1060; 2. Whitman C, Moslehi M N, Paranjpe A, et al. J Vac Sci Techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/02C30B29/62C30B7/14C30B7/10B22F9/24
Inventor 苏江滨李星星蒋美萍
Owner CHANGZHOU UNIV
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