# US 7,408,186 B2 · Controlled alignment catalytically grown nanostructures

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- Number: US 7,408,186 B2
- Document ID: US7408186B2
- Status: Granted
- Kind: B2
- Application number: 11/089,099
- Filed: 2005-03-24
- Published: 2005-08-04
- Granted: 2008-08-05
- Earliest claimed: 2002-02-06
- Assignees: UT-Battelle, LLC
- Inventors: Vladimir I. Merkulov; Anatoli V. Melechko; Michael A. Guillorn; Douglas H. Lowndes; Michael L. Simpson
- Web page: https://patentgrep.com/patent/US7408186B2

## CPC

- G01N 33/5438: {Electrodes}
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- C01B 32/162: characterised by catalysts
- D01F 9/127: by thermal decomposition of hydrocarbon gases or vapours {or other carbon-containing compounds in the form of gas or vapour, e.g. carbon monoxide, alcohols}
- C01B 2202/08: Aligned nanotubes
- Y10S 977/843: Gas phase catalytic growth, i.e. chemical vapor deposition
- Y10S 977/891: Vapor phase deposition
- Y10S 977/943: Information storage or retrieval using nanostructure
- Y10T 428/24628: Nonplanar uniform thickness material
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Systems and methods are described for controlled alignment of catalyticaly grown nanostructures in a large-scale synthesis process. A composition includes an elongated nanostructure including a first segment defining a first axis and a second segment coupled to the first segment, the second segment defining a second axis that is substantially nonparallel to the first axis. A method includes: generating an electric field proximate an edge of a protruding section of an electrode, the electric field defining a vector; and forming an elongated nanostructure located at a position on a surface of a substrate, the position on the surface of the substrate proximate the edge of the protruding section of the electrode, at least one tangent to the elongated nanostructure i) substantially parallel to the vector defined by the electric field and ii) substantially non-parallel to a normal defined by the surface of the substrate.

## Claims

### Claim 1

A composition, comprising an elongated nanostructure including a first elongated segment defining a first axis and a second elongated segment coupled to the first segment, the second elongated segment defining a second axis that is substantially nonparallel to the first axis;
a substrate coupled to the elongated nanostructure;
another elongated nanostructure coupled to the substrate; and
wherein the elongated segments are substantially linear.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the another elongated nanostructure defines another axis that is substantially parallel to one axis selected from the group consisting of the first axis and the second axis.