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Method for forming nano-scale metal particles

a metal particle and nano-scale technology, applied in metal-working apparatuses, transportation and packaging, etc., can solve the problems of increased production cost, burning or explosion,

Inactive Publication Date: 2009-04-09
CHUNG YUAN CHRISTIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The invention discloses a method for forming nano-scale metal particles by a novel reducing agent. The method can be carried out at room temperature and under an atmospheric environment by relatively simple processes to prepare nano-scale metal particles with a diameter less than 20 nm. This method comprises the following steps. At first, a first blending process is performed to blend a metal salt and a first solvent together to form a first solution. Then, a second blending process is performed to blend a reducing agent and a second solvent together to form a second solution. The reduci

Problems solved by technology

In the above chemical reduction method, the reducing agent in use can easily react with oxygen or moisture to result in burning or an explosion.
By doing so, the production cost will be increased.

Method used

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  • Method for forming nano-scale metal particles
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  • Method for forming nano-scale metal particles

Examples

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Effect test

example 1

Formation and Properties of Tin-Containing Nano-Scale Metal Particles

[0029]is example is to prepare and investigate the tin-containing nano-scale metal particles according to the invention. The chemical equation is shown as the following:

SnCl2+2N(Et)4(BH4)→Sn+2N(Et)4Cl+B2H6+H2.

[0030]e detailed steps are given in the following. At room temperature and under an atmospheric environment, a certain amount of the reducing agent and a certain amount of SnCl2 are weighted and placed in a 50 ml graduate cylinder, separately. A magnet is placed in the graduate cylinder for stirring beforehand. Then, a septum is used to seal the container and the septum is then wrapped with paraffin for air-tight. Nitrogen gas is introduced into the graduate cylinder to expel the moisture in air. 20 ml of solvent is added by a syringe and then the mixture is stirred for 30 minutes to ensure completely dissolving in the solvent. Thus, the reducing agent solution and the SnCl2 solution are prepared. The reducing...

example 2

Formation of Copper Nano-Scale Metal Particles

[0033]The chemical equation for forming copper nano-scale metal particles according to the invention is shown as the following:

CuCl2+2N(C2H5)4BH4→Cu+2N(C2H5)4Cl+B2H6+H2.

[0034]The detailed steps are given in the following. At room temperature and under a nitrogen environment, a proper quantity of the reducing agent is weighted. The reducing agent is tetraethylammonium borohydride. The reducing agent dissolves in the solvent to form 20 ml of 0.01M reducing agent solution. Then, at room temperature and under a nitrogen environment, a proper quantity of copper chloride is weighted and dissolves in the solvent to form 20 ml of 0.005M copper chloride solution. These solutions are separately stirred by magnets for over 20 minutes to ensure completely dissolution. Finally, under a nitrogen environment, the reducing agent solution is blended with the copper chloride solution with different ratios. An ultrasonic vibrator is used while the reaction...

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Abstract

A method for forming nano-scale metal particles by a novel reducing agent is described. The method can be carried out at room temperature and under an atmospheric environment by relatively simple processes to prepare nano-scale metal particles with a diameter less than 20 nm. This method comprises the following steps. At first, a first blending process is performed to blend a metal salt and a first solvent together to form a first solution. Then, a second blending process is performed to blend a reducing agent and a second solvent together to form a second solution. The reducing agent comprises one compound selected from the group consisting of the following or combination thereof: boron-containing hydride and boron-containing hydrocarbon. Following that, a third blending process is performed to blend the first solution and the second solution together to form a third solution. Finally, the reducing agent is used to reduce the metal salt in the third solution to form the nano-scale metal particles. In addition, if a dispersing agent is added after the nano-scale metal particles are formed, the nano-scale metal particles can have a particle diameter less than 10 nm.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention is generally related to a method for forming nano-scale particles and more particularly to a method for forming nano-scale particles by a novel reducing agent.[0003]2. Description of the Prior Art[0004]A nano-scale metal material means a material containing nano-scale metal particles or having the nano-scale structure in the matrix thereof. As the diameter of metal particles is within the nano scale, the surface area of particles becomes very large and new electrical, magnetic, optical, and chemical characteristics different from the bulk material thereof are appeared due to the particle diameter being less than the light wavelength so that these nano-scale particles can be applied in various fields, such as electrode materials, conducting films, biochemical sensing, drug delivery, optical sensing, catalyzed reaction, and electrical engineering.[0005]Nano-scale metal materials can be categorized in...

Claims

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Application Information

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IPC IPC(8): B22F9/20B22F1/052
CPCB22F9/24B22F1/052
Inventor CHENG, CHUN-LIN
Owner CHUNG YUAN CHRISTIAN UNIVERSITY