Biodegradable magnetic microcluster comprising non-magnetic metal or metal oxide particles coated with a functionalized polymer
First Claim
1. A biodegradable magnetic microcluster comprising a cluster of non-magnetic metal or metal oxide particles having a crystallite size of 70 Angstroms or less which are coated with a functionalized polymer wherein the magnetic microcluster is about 100 Angstroms to 2 microns in size and is formed by chemical interaction between the functional groups of the polymer.
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Abstract
Subdomain metal or metal oxide particles covalently coupled to chemically reactive organic moieties and subsequently reacted together to form biodegradable magnetic microclusters are disclosed. The magnetic microcluster can be used as contrast agents in NMR imaging for the production of images suitable for use in diagnosis, for in vivo delivery and targeting of drugs, as in vivo, biodegradable agents for the sequestering of free metal ions in the treatment of metal driven disease.
46 Citations
12 Claims
- 1. A biodegradable magnetic microcluster comprising a cluster of non-magnetic metal or metal oxide particles having a crystallite size of 70 Angstroms or less which are coated with a functionalized polymer wherein the magnetic microcluster is about 100 Angstroms to 2 microns in size and is formed by chemical interaction between the functional groups of the polymer.
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12. A biodegradable superparamagnetic microcluster comprising a cluster of non-magnetic metal or metal oxide particles having a crystalline size of about 70 Angstroms or less, which are coated with amino-hexyl-titanium triisopropoxide, wherein the microcluster is formed by covalent bonding or complexation of the amino-functional groups to a cluster size from about 100 Angstroms to 2 microns.
Specification