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 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.

Publication DOI: https://doi.org/10.1021/nl8015413
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Uncontrolled Keywords: center-of-mass,angular fluctuations,three-dimensional tracking,optically trapped nanotubes,optical force,torque constants,autocorrelation,cross-correlation,tracking signals,angular Brownian motion,nanotubes,nanometer spatial,femtonewton force resolution,photonic force microscopy,nanotechnology,biotechnology,nanofluidics,material science,Bioengineering,Chemistry(all),Mechanical Engineering,Materials Science(all),Condensed Matter Physics
Full Text Link: http://www-g.en ... rago_NL2008.pdf
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://pubs.acs ... .1021/nl8015413 (Publisher URL)
PURE Output Type: Article
Published Date: 2008-09-04
Authors: Marago, O.M.
Jones, P.H.
Scardaci, V.
Bonaccorso, F.
Gucciardi, P.G.
Rozhin, Aleksey ( 0000-0003-2271-8227)
Ferrari, A.C.

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