Nanotechnology Conference and Trade Show - Nanotech 2006
> Program > Technical Conferences > Business & Development > Nano Impact Workshop > Nanotech Job Fair > Expo
Program
Sessions
Sunday
Monday
Tuesday
Wednesday
Thursday
Index of Authors
Index of Keywords
Confirmed Speakers
Conferences & Symposia

Conference Proceedings

Conference Technical Proceedings

Separating Single-Walled Carbon Nanotubes by Length

U. Rauwald, D.J. Schmidt, R.H. Hauge, R.E. Smalley and K.J. Ziegler
University of Florida, US

Keywords:
carbon nanotubes, length, separation

Abstract:
Single-walled carbon nanotubes (SWNTs) have received great attention because of their unique electronic and mechanical properties combined with their chemical stability. Typically, SWNTs are microns in length; however, intermediate lengths between small spheroidal fullerenes and long SWNTs could have significant scientific and technological importance. One such application is molecular electronics, in which a nanotube of precise length and specific band gap will need to be placed in a well-defined location. Specific length nanotubes will also be useful in biological imaging and sensing applications where shorter nanotube lengths may be required to penetrate cells and to serve as biological markers. Finally, the ability to control the length of the nanotubes will allow control over their solubility, which will aid in the development of many applications such as the dispersion of SWNTs into composites. To effectively use carbon nanotubes for these applications, we need to develop economically feasible and scalable methods of cutting and sorting SWNTs by length. Here, we describe current cutting techniques to achieve short, cut nanotubes and then describe a two-phase liquid-liquid extraction process which is capable of extracting water-soluble SWNTs into an organic phase. The extraction utilizes electrostatic interactions between a common phase transfer agent and the sidewall functional groups on the nanotubes. Large length-dependent van der Waals forces for nanotubes allow the ability to control the length of nanotubes extracted into the organic phase as demonstrated by AFM.

Back to Program

Sessions Sunday Monday Tuesday Wednesday Thursday Authors

Nanotech 2006 Conference Program Abstract

 
Nanotechnology Conference | Terms of use | Privacy policy | Contact | NSTI Home
Program | Technical Conferences | Business & Development | Nano Impact Workshop | Nanotech Job Fair | Expo |
Nanotech 2006 Home | Press Room | Venue | Subscribe | Site Map
Names, and logos of other organizations are the property of those organizations and not of NSTI.
This event is not open to the general public and NSTI reserves the right to refuse admission and participation to any individual.