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US 11,479,467 B2Granted
Covalent reinforcement of carbon nanotube assemblies
AssigneeLawrence Livermore National Security, LLC
InventorsXavier N. Lepro Chavez, Chantel M. Aracne-Ruddle, Leonardus Bimo Bayu Aji, Sergei O. Kucheyev, Michael Stadermann
Life of this patent
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Abstract
Disclosed here is a method of fabricating a covalently reinforced carbon nanotube (CNT) assembly. The method includes producing a CNT assembly by pulling entangled CNTs from a CNT array fabricated on a substrate, the CNT assembly including a plurality of CNTs that are aligned; and creating covalent bonding between the CNTs of the CNT assembly by applying a high energy ion irradiation to the CNT assembly.
Claims8
A carbon nanotube (CNT) based material, comprising:
- a plurality of CNTs that are aligned, the adjacent CNTs of the plurality of CNTs are covalently bonded through defects created by a high energy ion irradiation such that the CNT based material has a Young's modulus that is at least about 5 GPa greater than that of an untreated CNT based material, dosage of the high energy ion irradiation is from about 1013 ions per cm2 to about 1016 ions per cm2;
- wherein adjacent CNTs of the plurality of CNTs are covalently bonded between each other, and the adjacent CNTs of the plurality of CNTs are covalently bonded through defects created by the high energy ion irradiation such that the Young's modulus is not monotonic relative to the dosage as the dosage increases and an intensity of a D band of Raman spectroscopy of the CNT based material is greater than an intensity of a G band of the Raman spectroscopy of the CNT based material.
A carbon nanotube (CNT) based material, comprising:
- a plurality of CNTs that are aligned, wherein adjacent CNTs of the plurality of CNTs are covalently bonded between each other through defects created by irradiation by 4He+ ions from about 1013 4He+ ions per cm2 to about 1016 4He+ ions per cm2 such that the CNT based material has a Young's modulus that is at least about 5 GPa greater than that of a CNT based material not treated by irradiation and that is not monotonic relative to the irradiation as the irradiation is increased between about 1013 4He+ ions per cm2 and about 1016 4He+ ions per cm2, and an intensity of a D band of Raman spectroscopy of the CNT based material is greater than an intensity of a G band of the Raman spectroscopy of the CNT based material.
Dependencies are inferred from the claim text.