Invention Grant
US07122168B2 Shape anisotropic metal oxide nanoparticles and synthetic method thereof
失效
形状各向异性金属氧化物纳米粒子及其合成方法
- Patent Title: Shape anisotropic metal oxide nanoparticles and synthetic method thereof
- Patent Title (中): 形状各向异性金属氧化物纳米粒子及其合成方法
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Application No.: US10678047Application Date: 2003-10-01
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Publication No.: US07122168B2Publication Date: 2006-10-17
- Inventor: Kyoungja Woo , Jae-Pyoung Ahn , Hae-Weon Lee
- Applicant: Kyoungja Woo , Jae-Pyoung Ahn , Hae-Weon Lee
- Applicant Address: KR Seoul
- Assignee: Korea Institute of Science and Technology
- Current Assignee: Korea Institute of Science and Technology
- Current Assignee Address: KR Seoul
- Agency: Darby & Darby
- Priority: KR10-2002-0060309 20021002
- Main IPC: C01G1/00
- IPC: C01G1/00 ; C01G49/00

Abstract:
In a metal oxide nanoparticle and a synthetic method thereof, and in particular to maghemite (γ-Fe2O3) nanoparticles usable as a superhigh density magnetic recording substance by having good shape anisotropy and magnetic characteristics, hematite (α-Fe2O3) nanoparticles usable as a precursor to the maghemite or a catalyst, maghemite and hematite-mixed nanoparticles and a synthetic method thereof, the method for synthesizing metal oxide nanoparticles includes forming a reverse micelle solution by adding distilled water, a surfactant and a solvent to metallic salt not less than trivalent, precipitating and separating gel type amorphous metal oxide particles by adding proton scavenger to the reverse micelle solution; adjusting a molar ratio of metal oxide to the surfactant by washing the gel type amorphous metal oxide particles with a polar solvent; and crystallizing metal oxide nanoparticles through heating or reflux after dispersing the gel type amorphous metal oxide particles in a non-polar solvent having a high boiling point.
Public/Granted literature
- US20040115124A1 Shape anisotropic metal oxide nanoparticles and synthetic method thereof Public/Granted day:2004-06-17
Information query
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