Very long single- and few-walled boron nitride nanotubes via the pressurized vapor/condenser method.
A new method for producing long, small-diameter, single- and few-walled, boron nitride nanotubes (BNNTs) in macroscopic quantities is reported. The pressurized vapor/condenser (PVC) method produces, without catalysts, highly crystalline, very long, small-diameter, BNNTs. Palm-sized, cotton-like masses of BNNT raw material were grown by this technique and spun directly into centimeters-long yarn. Nanotube lengths were observed to be 100 times that of those grown by the most closely related method. Self-assembly and growth models for these long BNNTs are discussed.
Smith
Michael W
MW
NASA Langley Research Center, Hampton, VA 23681, USA.
Jordan
Kevin C
KC
Park
Cheol
C
Kim
Jae-Woo
JW
Lillehei
Peter T
PT
Crooks
Roy
R
Harrison
Joycelyn S
JS