Metal nano particle and method for manufacturing them and conductive ink

Inactive Publication Date: 2006-11-16
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] The present invention provides a method of producing metal nanoparticles using a hydrophobic solvent, having uniform particle size distribution and high yield rate to allow mass production. Also, the present

Problems solved by technology

However, since the vapor method which uses plasma or gas evaporation requires highly expensive equipment, the solution method is generally used, which is more easily utilized in mass production.
However, the production of metal nanoparticles by such existing methods provides a very low yield rate, as it is limited by the concentration of the metal compound solution.
Thus, there is a limit also on the yield of metal nanoparticles, and to obtain metal nanoparticles of uniform size in quantities of several grams,

Method used

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  • Metal nano particle and method for manufacturing them and conductive ink
  • Metal nano particle and method for manufacturing them and conductive ink
  • Metal nano particle and method for manufacturing them and conductive ink

Examples

Experimental program
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Example

EXAMPLE 1

[0061] 5 g of AgNO3 was dissociated in 20 g of butylamine. The color of the solution was transparent. Here, 50 ml of toluene and 5.6 g of lauric acid were added. This mixed solution was heated to 110° C., which is the boiling point of toluene. After refluxing for 4 hours, the solution turned into a red color, and ultimately into a thick brown color. A mixture of acetone, ethanol, and methanol was added to the thick brown solution, to precipitate silver nanoparticles. These precipitates were collected after centrifugal separation. Analyzing these precipitates with a UV-VIS spectroscope provided a graph having a peak such as that in FIG. 1, by which it was found that 0.3 g of silver nanoparticles having sizes of 1 to 40 nm were obtained. From the results of TEM analysis on the particles after centrifugal separation, it was found that particles having a uniform size of 7 nm were obtained, as in FIG. 2.

Example

EXAMPLE 2

[0062] 5 g of AgNO3 was dissociated in 20 g of butylamine. The color of the solution was transparent. Here, 50 ml of toluene and 5.6 g of lauric acid were added. Here, 1.6 g of TBAB was added further, which is a reducing agent. With the addition of TBAB, the color of the solution turned red. As the solution was heated up to 110° C., the boiling point of toluene, and refluxed for 2 hours, the solution gradually turned into a thick brown color. A mixture of acetone, ethanol, and methanol was added to the thick brown solution, to precipitate silver nanoparticles. After centrifugal separation of the precipitates, 1.2 g of silver nanoparticles were obtained. From the results of TEM analysis on the particles, it was found that particles having a uniform size of 7 nm were formed.

Example

EXAMPLE 3

[0063] 16 g of AgNO3 was dissociated in 30 g of butylamine. The color of the solution was a faint yellow. Here, 100 g of xylene was added and the mixture stirred. Here, 20 g of lauric acid was further added, and the solution was refluxed for 20 minutes while being heated up to 140° C., the boiling point of xylene. As the reaction progressed, the solution turned into a red color, and ultimately into a thick brown color. A mixture of acetone, ethanol, and methanol was added to the thick brown solution, to precipitate silver nanoparticles. After centrifugal separation of the precipitates, 1.6 g of silver nanoparticles were obtained. From the results of TEM analysis on the particles, it was found that particles having a uniform size of 6 nm were formed.

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Abstract

A method of producing hydrophobic metal nanoparticles using a hydrophobic solvent, having uniform particle size distribution and high yield rate to allow mass production; the metal nanoparticles thus produced; and conductive ink including the metal nanoparticles are disclosed. According to one aspect of the invention, a method of producing metal nanoparticles is provided, comprising dissociating a metal compound with an amine-based compound, and adding a hydrocarbon-based compound and either one of an alkanoic acid or a thiol-based compound to the dissociated metal ion solution.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of Korean Patent Application No. 2005-39013 filed on May 10, 2005 and Korean Patent Application No. 2005-55186 filed on Jun. 24, 2005, the contents of which are incorporated here by reference in their entirety. BACKGROUND [0002] 1. Technical Field [0003] The present invention relates to a method of producing metal nanoparticles and the metal nanoparticles thus produced, and in particular, to a method of producing metal nanoparticles by the solution method. [0004] 2. Description of the Related Art [0005] There are two major methods of producing metal nanoparticles, namely the vapor method and the solution method (colloid method). However, since the vapor method which uses plasma or gas evaporation requires highly expensive equipment, the solution method is generally used, which is more easily utilized in mass production. [0006] One existing method of producing metal nanoparticles by the solution method...

Claims

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Application Information

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IPC IPC(8): B22F9/24A01N59/16A01P3/00A61L9/01B01J19/00B22F1/054B41M5/00B82B3/00B82Y5/00B82Y30/00B82Y40/00B82Y99/00C09D11/00C09D11/52C09J9/02C09J201/00H01B1/22
CPCB22F1/0018B22F9/24H05K1/097C09D11/52B82Y30/00B22F1/054
Inventor LEE, KWI-JONGJUN, BYUNG-HOLEE, YOUNG-ILCHO, HYE-JIN
Owner SAMSUNG ELECTRO MECHANICS CO LTD
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