Method for preparing dispersed crystalline copper particles for electronic applications

2009 ◽  
Vol 24 (10) ◽  
pp. 3237-3240 ◽  
Author(s):  
Ionel Halaciuga ◽  
Sylas LaPlante ◽  
Dan V. Goia
Keyword(s):  
Metallic Copper ◽  
Cuprous Chloride ◽  
Aqueous Dispersions ◽  
Copper Particles ◽  
Ferrous Citrate ◽  
Citrate Complex ◽  
Copper Powders

Dispersed crystalline copper particles were prepared by reacting aqueous dispersions of CuCl with ferrous citrate. We report that the Fe(II) citrate complex can reduce rapidly and completely cuprous chloride to metallic copper and propose a mechanism for the reaction observed. By changing the precipitation conditions, copper particles with sizes varying from 250 nm to 2.0 µm were obtained. The method described represents a simple and versatile approach for preparing copper powders for electronic applications.

Nanocomposites of metallic copper and spinel ferrite films: Growth and self-assembly of copper particles

2005 ◽  
Vol 493 (1-2) ◽  
pp. 49-53 ◽  
Author(s):  
Emmanuelle Mugnier ◽  
Isabelle Pasquet ◽  
Antoine Barnabé ◽  
Lionel Presmanes ◽  
Corine Bonningue ◽  
...  
Keyword(s):  
Self Assembly ◽  
Spinel Ferrite ◽  
Metallic Copper ◽  
Copper Particles ◽  
Ferrite Films

Preparation of Ultrafine Copper Particles in Poly (2-Vinylpyridine)

1988 ◽  
Vol 132 ◽  
Author(s):  
Alan M. Lyons ◽  
S. Nakahara ◽  
E. M. Pearce
Keyword(s):  
Polymer Matrix ◽  
Redox Reaction ◽  
Metallic Copper ◽  
Average Diameter ◽  
Decomposition Reaction ◽  
Polymer Precursor ◽  
Scanning Calorimetry ◽  
Copper Particles ◽  
Copper Formate ◽  
Ultrafine Copper

ABSTRACTUltrafine copper particles were prepared by the thermal decomposition of a copper formate-poly(2-vinylpyridine) complex. At temperatures above 125°C, a redox reaction occurs where Cu+2 is reduced to copper metal and formate is oxidized to CO2 and H2. The decomposition reaction was studied by thermogravimetric analysis, differential scanning calorimetry and mass spectrometry. Copper concentrations up to 23 wt% have been incorporated into the polymer by this technique. The presence of the polymeric ligand induces the redox reaction to occur at a temperature 80°C lower than in uncomplexed copper formate. Incorporation of the reducing agent (formate anion) into the polymer precursor enables the redox reaction to occur in the solid state. Films of the polymer precursor were prepared and the formation of metallic copper particles were studied by visible and infrared spectroscopy, x-ray diffraction techniques, and transmission electron microscopy. Results from these measurements indicate that spherical copper particles with an average diameter of 35angstrom are isolated within the polymer matrix. The particles are thermodynamically stable at temperatures up to the decomposition of the polymer matrix (≈350 °C), but oxidize rapidly upon exposure air.

Copper(I) oxide and metallic copper particles formed in 1,2-propane diol

2007 ◽  
Vol 27 (2-3) ◽  
pp. 987-991 ◽  
Author(s):  
Alojz Anžlovar ◽  
Zorica Crnjak Orel ◽  
Majda Žigon
Keyword(s):  
Metallic Copper ◽  
Copper Particles

Ferrous-Citrate Complex and Nigral Degeneration: Evidence for Free-radical Formation and Lipid Peroxidationa

2006 ◽  
Vol 738 (1) ◽  
pp. 392-399 ◽  
Author(s):  
K. P. MOHANAKUMAR ◽  
A. DE BARTOLOMEIS ◽  
R.-M. WU ◽  
K. J. YEH ◽  
L. M. STERNBERGER ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Formation ◽  
Ferrous Citrate ◽  
Citrate Complex ◽  
Free Radical Formation ◽  
Nigral Degeneration

Synthesis of Well-Dispersed Copper Nanoparticles by L-Ascorbic Acid in Diethyleneglycol

2012 ◽  
Vol 549 ◽  
pp. 378-381 ◽  
Author(s):  
Jun Cheng Zhou ◽  
Wei He ◽  
Yao Tang ◽  
Yong Suan Hu
Keyword(s):  
Electron Microscopy ◽  
Ascorbic Acid ◽  
Copper Nanoparticles ◽  
Metallic Copper ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Copper Particles ◽  
Transmission Electron ◽  
Face Centered ◽  
Fcc Structure

Metallic copper nanoparticles were synthesized in the presence of poly(N-vinylpyrrolidone) (PVP) as the capping agent and L-ascorbic acid as the reducing agent in diethyleneglycol (DEG) solvent. The obtained copper nanoparticles were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The EDS and XRD results showed that the resultant particles were confirmed to be crystalline Cu with a face-centered cubic (fcc) structure. It was also observed that the diameter of obtained copper particles ranging from 80 to 120nm via SEM and TEM.

scholarly journals Preparation of high-concentration colloid solutions of metallic copper particles and their use in metal–metal bonding processes

2019 ◽  
Vol 1 (8) ◽  
Author(s):  
Yuki Suga ◽  
Kouichi Nakashima ◽  
Noriko Yamauchi ◽  
Yusuke Yasuda ◽  
Toshiaki Morita ◽  
...  
Keyword(s):  
Metallic Copper ◽  
High Concentration ◽  
Metal Bonding ◽  
Copper Particles ◽  
Metal Metal

THE ACTION OF HYDRONITRIC ACID ON CUPROUS CHLORIDE AND METALLIC COPPER.

1912 ◽  
Vol 34 (4) ◽  
pp. 382-384 ◽  
Author(s):  
J. W. Turrentine ◽  
Raymond L. Moore
Keyword(s):  
Metallic Copper ◽  
Cuprous Chloride
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