Femtonewton Force Sensing with Optically Trapped Nanotubes

We extract the distribution of both center-of-mass and angular fluctuations from three-dimensional tracking of optically trapped nanotubes. We measure the optical force and torque constants from autocorrelation and cross-correlation of the tracking signals. This allows us to isolate the angular Brow...

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Bibliographic Details
Published in:Nano letters 2008-10, Vol.8 (10), p.3211-3216
Main Authors: MaragoĢ€, O. M, Jones, P. H, Bonaccorso, F, Scardaci, V, Gucciardi, P. G, Rozhin, A. G, Ferrari, A. C
Format: Article
Language:English
Subjects:
Biotechnology - methods
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Materials science
Materials Testing
Mechanics
Microfluidics - methods
Micromanipulation - instrumentation
Microscopy, Atomic Force - methods
Models, Statistical
Nanoscale materials and structures: fabrication and characterization
Nanotechnology - methods
Nanotubes
Optical Tweezers
Physics
Physics - methods
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
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Summary:We extract the distribution of both center-of-mass and angular fluctuations from three-dimensional tracking of optically trapped nanotubes. We measure the optical force and torque constants from autocorrelation and cross-correlation of the tracking signals. This allows us to isolate the angular Brownian motion. We demonstrate that nanotubes enable nanometer spatial and femtonewton force resolution in photonic force microscopy, the smallest to date. This has wide implications in nanotechnology, biotechnology, nanofluidics, and material science.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl8015413