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US 11,229,949 B2Granted
Solid gold-nickel alloy nanoparticle
AssigneeM. Technique Co., Ltd.
InventorsMasaki Maekawa, Kazuya Araki, Daisuke Honda, Masakazu Enomura
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AssigneeM. Technique Co., Ltd.
InventorsMasaki Maekawa, Kazuya Araki, Daisuke Honda, Masakazu Enomura
Estimating the term…
The purpose of the present invention is to provide novel solid gold-nickel alloy nanoparticles and a production method thereof. Provided are solid gold-nickel alloy nanoparticles having a particle diameter of 500 nm or less. In particular, gold-nickel alloy nanoparticle are provided in which the concentration of nickel in the gold-nickel alloy is 2.0-92.7 wt %, and the main component is a gold-nickel alloy in which gold and nickel are in a nano-level fine mixed state. The gold-nickel alloy particles have as the main component a substitutional solid solution of gold and nickel. These gold-nickel alloy particles are optimally formed by mixing and discharging gold ions, and a substance having reducing characteristics in the thin film fluid occurring between processing surfaces which are arranged facing each other, which can move towards and away from each other, and at least one of which rotates relative to the other.
A gold-nickel alloy nanoparticle, which is a solid gold-nickel alloy nanoparticle having a particle diameter of larger than 10 nm, wherein as a result of microrange analysis of the solid gold-nickel alloy nanoparticle by an energy dispersive X-ray spectroscopy under observation with a transmission electron microscope (TEM-EDS) analysis using a beam diameter of 5 nm, molar ratios of gold and of nickel in 50% or more of analysis points thereof are detected within ±30% of molar ratios of gold and nickel obtained by inductively coupled plasma atomic emission spectrophotometry (ICP) analysis result of the solid gold-nickel alloy nanoparticle.
A gold-nickel alloy nanoparticle, which is a solid gold-nickel alloy nanoparticle, wherein as a result of microrange analysis of the solid gold-nickel alloy nanoparticle by an energy dispersive X-ray spectroscopy under observation with a scanning transmission electron microscope (STEM-EDS) analysis using a beam diameter of 0.2 nm, molar ratios of gold and nickel in 50% or more of analysis points thereof are detected within ±30% of molar ratios of gold and nickel obtained by inductively coupled plasma atomic emission spectrophotometry (ICP) analysis result of the solid gold-nickel alloy nanoparticle.
Dependencies are inferred from the claim text.