Fabrication of carbon-based nanostructures on metallic substrates, including aluminum-containing substrates

Patent metadata

Field	Value
Publication number	US-12479728-B2
Application number	US-201917413171-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Dec 14, 2018
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

Systems and methods for the fabrication of elongated carbon-based nanostructures on metallic substrates, including aluminum-containing substrates, are generally described. Inventive articles comprising elongated carbon-based nanostructures and metallic substrates are also described. Also described herein are articles that absorb a relatively large percentage of electromagnetic radiation over relatively broad ranges of wavelengths.

First claim

What is claimed is:

1 . An article comprising:
a substrate comprising aluminum metal and/or aluminum alloy; a catalyst comprising at least one metallic species arranged such that the at least one metallic species is in direct contact with metallic aluminum of the substrate; and elongated carbon-based nanostructures in direct contact with the catalyst; wherein the aluminum metal and/or aluminum alloy of the substrate has at least one cross-sectional dimension of at least about 1 mm; and wherein the at least one metallic species comprises Fe, Co, Ni, Cu, Au, and/or Al.

2 . The article of claim 1 , wherein the substrate consists of an aluminum metal substrate or an aluminum alloy substrate.

3 . The article of claim 1 , wherein the catalyst is in contact with a surface portion of the substrate that has nanoscale surface roughness.

4 . The article of claim 1 , wherein the at least one metallic species comprises at least one non-aluminum metallic species.

5 . The article of claim 1 , wherein the elongated carbon-based nanostructures comprise carbon nanotubes, carbon nanowires, and/or carbon nanofibers.

6 . The article of claim 1 , wherein a surface reflectance of the article is 1×10 −3 or less over the UV range, and/or 6×10 −4 or less over the visible range, and/or 6×104 or less over the near-infrared range, and/or 1×10 −3 or less over the mid-infrared range.

7 . The article of claim 6 , wherein the surface reflectance of the article is 6×10 −4 or less over the visible range.

8 . The article of claim 6 , wherein the surface reflectance of the article is 10 −5 or less over the UV, visible, near-infrared, and/or mid-infrared range.

9 . The article of claim 8 , wherein the surface reflectance of the article is 10 −5 or less over the visible range.

10 . The article of claim 6 , wherein the surface reflectance is over a surface having an area of at least 1 mm 2 .

11 . The article of claim 1 , wherein the article shows omni-directional blackbody optical absorption.

12 . The article of claim 1 , wherein the elongated carbon-based nanostructures comprise carbon nanotubes.

13 . The article of claim 1 , wherein the at least one metallic species comprises Fe and/or Co.

14 . The article of claim 13 , wherein the at least one metallic species comprises Fe and Co.

Assignees

• Massachusetts Inst Technology

Inventors

• Wardle Brian L
• Cui Kehang

Classifications

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J23/75

  Cobalt · CPC title

• B01J35/69

  bimodal · CPC title

• B01J35/615

  100-500 m2/g · CPC title