Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 106, Issue 34, Pages 14219-14223Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0904148106
Keywords
actin; microrheology; semiflexible filaments and polymers; stochastic dynamics; nanomechanics
Categories
Funding
- National Science Foundation (NSF) [CTS-CAREER 0134389, CHE0809020, EEC-0118007, EEC-0647452]
- Robert A. Welch Foundation [C-0807, C-1668]
- Applied NanoFluorescence, LLC, Welch Foundation [L-C-0004]
- Fullbright Foundation
- Delegation Generale pour l'Armement [ERE060016]
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By relating nanotechnology to soft condensed matter, understanding the mechanics and dynamics of single-walled carbon nanotubes (SWCNTs) in fluids is crucial for both fundamental and applied science. Here, we study the Brownian bending dynamics of individual chirality-assigned SWCNTs in water by fluorescence microscopy. The bending stiffness scales as the cube of the nanotube diameter and the shape relaxation times agree with the semiflexible chain model. This suggests that SWCNTs may be the archetypal semiflexible filaments, highly suited to act as nanoprobes in complex fluids or biological systems.
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