Nanotube coatings for implantable electrodes
First Claim
1. An implantable electrode, which comprises:
- a) a substrate;
b) a biocompatible and electrically conductive catalyzing coating supported on the substrate; and
c) a multiplicity of carbon-containing nanotubes adhering to the coating.
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Accused Products
Abstract
Coatings for implantable electrodes consisting of single- or multi-walled nanotubes, nanotube ropes, carbon whiskers, and a combination of these are described. The nanotubes can be carbon or other conductive nanotube-forming materials such as a carbon-doped boron nitride. The nanotube coatings are grown “in situ” on a catalytic substrate surface from thermal decomposition, or they are bonded to the substrate using a metal or conductive metal oxide thin film binder deposited by means of a metal compound precursor in liquid form. In the latter case, the precursor/nanotube coating is then converted to a pure metal or conductive metal oxide, resulting in the desired surface coating with imbedded nanotubes.
58 Citations
26 Claims
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1. An implantable electrode, which comprises:
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a) a substrate;
b) a biocompatible and electrically conductive catalyzing coating supported on the substrate; and
c) a multiplicity of carbon-containing nanotubes adhering to the coating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for providing an implantable electrode, comprising the steps of:
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a) providing a substrate;
b) coating a catalytic material selected from the group consisting of nitrogen-doped carbon, tantalum, titanium, zirconium, iridium, platinum, and niobium or a nitride, a carbide, a carbonitride, and an oxide thereof on the substrate;
c) heating the coated substrate;
d) contacting the heated substrate with a flowing hydrogen-containing gas stream to thereby provide carbon-containing nanotubes on the coated substrate; and
e) utilizing the nanotube coated substrate as an implantable electrode. - View Dependent Claims (12, 13)
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14. A method of providing an implantable electrode, comprising the steps of:
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a) providing a substrate;
b) providing nanotubes mixed with a binder precursor selected from chloroiridic acid, chloroplatinic acid, titanium (IV) chloride, zirconium (IV) chloride, niobium (V) chloride, and tantalum (V) chloride in a solvent;
c) contacting the binder precursor to the substrate;
d) converting the binder precursor to coating on the substrate having the nanotubes embedded therein. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method for providing an implantable electrode, comprising the steps of:
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a) providing a substrate;
b) coating a carbonaceous catalytic material on the substrate;
c) heating the carbonaceous coated substrate;
d) contacting the heated substrate with a flowing hydrogen-containing gas stream to thereby provide carbon-containing nanotubes on the carbonaceous coated substrate; and
e) utilizing the nanotube coated substrate as an implantable electrode. - View Dependent Claims (21, 22, 23, 24)
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25. A method for providing an implantable electrode, comprising the steps of:
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a) providing a substrate;
b) coating a catalytic material selected from the group consisting of nitrogen-doped carbon, tantalum, titanium, zirconium, iridium, platinum, and niobium or a nitride, a carbide, a carbonitride, and an oxide thereof on the substrate;
c) subjecting the coated substrate to a plasma assisted chemical vapor deposition process containing a flowing hydrocarbon-containing gas stream to thereby provide carbon-containing nanotubes on the coated substrate; and
d) utilizing the nanotube coated substrate as an implantable electrode. - View Dependent Claims (26)
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Specification