Method of forming iron oxide core metal shell nanoparticles

Details Method of forming iron oxide core metal shell nanoparticles Method of forming iron oxide core metal shell nanoparticles

2006-03-29

2010-11-09

Cleveland, Michael (Department: 1712)

Coating processes

Particles, flakes, or granules coated or encapsulated

Reexamination Certificate

active

07829140

ABSTRACT:
A method of forming mono-disperse iron-oxide core metal shell nanoparticles is disclosed. Particle size of the oxide core seeds is controlled and capped seeds are formed. The capping layer is desorbed by a thermally activated process and metal such as gold is chemically deposited on the core seeds in situ. This process can be repeated to produce multi-metal or different metal shells. A second capping layer is applied on the core/shell composite nanoparticles. In another step, the particles are sized by centrifuging to obtain a tightly controlled and narrow particle size distribution. The water-dispersibility of the particles is achieved by a thiol exchange reaction on the gold shell of the core/shell nanoparticles or by deposition of gold on ferritin-derived iron oxide cores in aqueous solution. Mono and multilayer thin films are assembled on different substrates using the core/shell particles and linking molecules.

REFERENCES:
patent: 3239382 (1966-03-01), Thompson
patent: 3923612 (1975-12-01), Wiesner
patent: 4554088 (1985-11-01), Whitehead et al.
patent: 5132193 (1992-07-01), Reddy et al.
patent: 5560960 (1996-10-01), Singh et al.
patent: 5585020 (1996-12-01), Becker et al.
patent: 5641723 (1997-06-01), Bonnemann et al.
patent: 5789337 (1998-08-01), Haruta et al.
patent: 5876867 (1999-03-01), Itoh et al.
patent: 5985232 (1999-11-01), Howard et al.
patent: 6162411 (2000-12-01), Howard et al.
patent: 6162532 (2000-12-01), Black
patent: 6180222 (2001-01-01), Schulz et al.
patent: 6221673 (2001-04-01), Snow et al.
patent: 6251303 (2001-06-01), Bawendi et al.
patent: 6252014 (2001-06-01), Knauss
patent: 6254662 (2001-07-01), Murray et al.
patent: 6262129 (2001-07-01), Murray et al.
patent: 6322901 (2001-11-01), Bawendi et al.
patent: 6344272 (2002-02-01), Oldenburg et al.
patent: 6361944 (2002-03-01), Mirkin et al.
patent: 6383500 (2002-05-01), Wooley et al.
patent: 6562403 (2003-05-01), Klabunde et al.
patent: 6773823 (2004-08-01), O'Connor
patent: 6818199 (2004-11-01), Hainfeld et al.
patent: 6861387 (2005-03-01), Ruth et al.
patent: 6872971 (2005-03-01), Hutchinson et al.
patent: 6962685 (2005-11-01), Sun
patent: 6972046 (2005-12-01), Sun et al.
patent: 6984265 (2006-01-01), Raguse et al.
patent: 7053021 (2006-05-01), Zhong et al.
patent: 7208439 (2007-04-01), Zhong et al.
patent: 2002/0034675 (2002-03-01), Starz et al.
patent: 2002/0160195 (2002-10-01), Halas et al.
patent: 2002/0174743 (2002-11-01), Mukherjee et al.
patent: 2002/0194958 (2002-12-01), Lee et al.
patent: 2003/0004054 (2003-01-01), Ito
patent: 2003/0029274 (2003-02-01), Natan et al.
patent: 2003/0166294 (2003-09-01), Kirby
patent: 2004/0055419 (2004-03-01), Kurihara et al.
patent: 2004/0115345 (2004-06-01), Huang et al.
patent: 2004/0167257 (2004-08-01), Ryang
patent: 2004/0247924 (2004-12-01), Andres
patent: 2004/0261574 (2004-12-01), Lin et al.
patent: 2005/0025969 (2005-02-01), Berning
patent: 2005/0191231 (2005-09-01), Sun
patent: 2005/0202244 (2005-09-01), Papagianakis
patent: 2006/0286379 (2006-12-01), Gao
patent: 0 557 674 (1993-09-01), None
patent: 6-271905 (1994-09-01), None
Wang et al., “Monodispersed Core-Shell Fe3O4@Au Nanoparticles,” J. Phys. Chem. B, 109, pp. 21593-21601 (2005).
Brust et al., “Synthesis of Thiol-Derivatised Gold Nanoparticles in a Two-Phase Liquid System,”J. Chem. Sol., Chem. Commun. pp. 801-2 (1994).
Buffat et al., “Size Effect on the Melting Temperature of Gold Particles,”Physical Review A13(6):2287-98 (1976).
Carotenuto et al., “Size-Controlled Synthesis of Thiol-Derivatized Gold Clusters,”J. Mater. Chem.13(5)1038-41 (2003).
Chen & Sommers, “Alkanethiolate-Protected Copper Nanoparticles: Spectroscopy, Electrochemistry, and Solid-State Morphological Evolution,”J. Phys. Chem. 105(37):8816-20 (2001).
Clarke et al., “Size-Dependent Solubility of Thiol-Derivatized Gold Nanoparticles in Supercritical Ethane,”Langmuir17(20):6048-50 (2001).
Daniel & Astruc, “Gold Nanoparticles: Assembly, Supramolecular Chemistry, Quantum-Size-Related Properties, and Applications Toward Biology, Catalysis, and Nanotechnology,”Chem. Rev. 104(1):293-346 (2004).
Fan et al., “Ordered Nanocrystal/Silica Particles Self-assembled from Nanocrystal Micelles and Silicate,”Chem. Commun. 2323-5 (2006).
Han et al., “Core-Shell nanostructured Nanoparticle Films as Chemically Sensitive Interfaces,”Anal. Chem. 73:4441-9 (2001).
Han et al., “Nanoparticle-Structured Sensing Array Materials and Pattern Recognition for VOC Detection,”Sensors and Actuators B106:431-41 (2005).
Han et al., “Quartz-Crystal Microbalance and Spectrophotometric Assessments of Inter-Core and Inter-Shell Reactivities in Nanoparticle Thin Film Formation and Growth,”Journal of Materials Chemistry11:1258-64 (2001).
Haruta, “Size- and Support-dependency in the Catalysis of Gold,”Catalysis Today36:153-166 (1997).
Hostetler et al., “Stable, Monolayer-Protected Metal Alloy Clusters,”J. Am. Chem. Soc. 120:9396-7 (1998).
Hu et al., “Competitive Photochemical Reactivity in a Self-Assembled Monolayer on a Colloidal Gold Cluster,”J. Am. Chem. Soc. 123:1464-70 (2001).
Hussain et al., “Preparation of Acrylate-Stabilized Gold and Silver Hydrosols and Gold-Polymer Composite Films,”Lanmuir19:4831-5 (2003).
Ito et al., “Medical Application of Functionalized Magnetic Nanoparticles,”J. Biosci. Bioeng. 100(1):1-11 (2005).
Jana et al., “Seeding Growth for Size Control of 5-40 nm Diameter Gold Nanoparticles,”Langmuir17:6782-6 (2001).
Kim et al., “Particle Size Control of 11-Mercaptoundecanoic Acid-Protected Au Nanoparticles by Using Heat-Treatment Method,”Chem. Letters33(3):344-5 (2004).
Leibowitz et al., “Structures and Properties of Nanoparticle Thin Films Formed via a One-Step Exchange—Cross-Linking—Precipitation Route,”Anal. Chem. 71(22):5076-83 (1999).
Lewis et al., “Melting, Freezing, and Coalescence of Gold Nanoclusters,”Physicl Review B56(4):2248-57 (1997).
Lou et al., “Gold platinum Alloy Nanoparticle Assembly as Catalyst for Methanol Electrooxidation,”Chem. Commun. 473-474 (2001).
Lu et al., “Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application,”Angew. Chem. Int. Ed. 46:1222-44 (2007).
Luo et al., “AFM Probing of Thermal Activation of Molecularly Linked Nanoparticle Assembly,”J. Phys. Chem. 108(28):9669-77 (2004).
Luo et al., “An EQCN Assessment of Electrocatalytic Oxidation of Methanol at Nanostructured Au-Pt Alloy Nanoparticles,”Electrochemistry Communications3:172-6 (2001).
Luo et al., “Thermal Activation of Molecularly-Wired Gold Nanoparticles on a Substrate as Catalyst,”Journal of American Chemical Society124:13988-9 (2002).
Maye et al., “Core-Shell Gold Nanoparticle Assembly as Novel Electrocatalyst of CO Oxidation,”Langmuir16(19):7520-7523 (2000).
Maye et al., “Heating-Induced Evolution of Thiloate-Encapsulated Gold Nanoparticles: A Strategy for Size and Shape Manipulations,”Langmuir16:490-7 (2000).
Maye et al., “Manipulating Core-Shell Reactivities for Processing Nanoparticle Sizes and Shapes,”J. Mater. Chem. 10:1895-1901 (2000).
Maye et al., “Size Controlled Assembly of Gold Nanoparticles Induced by a Tridentate Thioether Ligand,”J. Am. Chem. Soc. 125:9906-7 (2003).
Merriam Webster, New Collegiate Dictionary, G. & C. Merriam Company p. 105 (1979).
Park et al., “Fabrication of Magnetic Core@Shell Fe Oxide@Au Nanoparticles for Interfacial Bioactivity and Bio-separation,”Langmuir23(17):9050-6 (2007).
Paulus et al., “New PtRu Alloy Colloids as Precursors for Fuel Cell Catalysts,”Journal of Catalysts195:383-393 (2000).
Sau et al., “Size Controlled Synthesis of Gold Nanoparticles Using Photochemically Prepared Seed Particles,”Journal of Nanoparticle Research3:

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