Direct synthesis of long single-walled carbon nanotube strands

US7615204B2 · kind B2 · utility

Assignees

• Rensselaer Polytechnic Institute · US
• TSINGHUA UNIVERSITY · CN

Inventors

• Pulickel M. Ajayan · Houston, US
• Bingqing Wei · Baton Rouge, US
• Hongwei Zhu · San Jose, US
• Cailu Xu · Beijing, CN
• Dehai Wu · Beijing, CN

Key dates

• Filing date: Feb 24, 2003
• Grant date: Nov 10, 2009
• Expiry date: Jun 22, 2026

Classification

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

Abstract

Long, macroscopic nanotube strands or cables, up to several tens of centimeters in length, of aligned single-walled nanotubes are synthesized by the catalytic pyrolysis of n-hexane using an enhanced vertical floating catalyst CVD technique. The long strands of nanotubes assemble continuously from ropes or arrays of nanotubes, which are intrinsically long. These directly synthesized long nanotube strands or cables can be easily manipulated using macroscopic tools.