Growth and applications of ultralong carbon nanotubes

US8529994B2 · kind B2 · utility

Assignees

• The Trustees of Columbia University in the City of New York · US
• POHANG UNIVERSITY OF SCIENCE AND TECHNOLOGY · KR

Inventors

• Philip Kim · Cambridge, US
• Byung Hee Hong · Seoul, KR
• Ju Young Lee · Daejeon, KR
• Kwang Soo Kim · Lexington, US

Key dates

• Filing date: Nov 21, 2011
• Grant date: Sep 10, 2013
• Expiry date: Nov 21, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2918
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Ultralong carbon nanotubes can be formed by placing a secondary chamber within a reactor chamber to restrict a flow to provide a laminar flow. Inner shells can be successively extracted from multi-walled carbon nanotubes (MWNTs) such as by applying a lateral force to an elongated tubular sidewall at a location between its two ends. The extracted shells can have varying electrical and mechanical properties that can be used to create useful materials, electrical devices, and mechanical devices.