Femtonewton Force Sensing with Optically Trapped Nanotubes

Maragó, Onofrio M.; Jones, Philip H.; Bonaccorso, Francesco; Scardaci, Vittorio; Gucciardi, P. G.; Rozhin, Aleksey; Ferrari, AC

doi:10.1021/nl8015413

Cited by 112 publications

(186 citation statements)

References 37 publications

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“…the precision with which the sensing element can be positioned). Increased attention has recently been directed towards the optical trapping and control of micro-and nano-rods, not only for their applications in high precision force and torque sensing [14,15], but also in order to investigate their properties [16], and their potential in device fabrication [17].…”

Section: Introductionmentioning

confidence: 99%

An optically actuated surface scanning probe

et al. 2012

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Abstract:We demonstrate the use of an extended, optically trapped probe that is capable of imaging surface topography with nanometre precision, whilst applying ultra-low, femto-Newton sized forces. This degree of precision and sensitivity is acquired through three distinct strategies. First, the probe itself is shaped in such a way as to soften the trap along the sensing axis and stiffen it in transverse directions. Next, these characteristics are enhanced by selectively position clamping independent motions of the probe. Finally, force clamping is used to refine the surface contact response. Detailed analyses are presented for each of these mechanisms. To test our sensor, we scan it laterally over a calibration sample consisting of a series of graduated steps, and demonstrate a height resolution of ∼ 11 nm. Using equipartition theory, we estimate that an average force of only ∼ 140 fN is exerted on the sample during the scan, making this technique ideal for the investigation of delicate biological samples. 288-290 (1986). 2. A. Pralle, M. Prummer, E. L. Florin, E. H. K. Stelzer, and J. K. H. Horber, "Three-dimensional high-resolution particle tracking for optical tweezers by forward scattered light," Microsc.

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Section: Introductionmentioning

confidence: 99%

An optically actuated surface scanning probe

et al. 2012

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“…One reason could be that, as opposed to spheres, which have been studied extensively [5][6][7], hydrodynamic couplings between anisotropic bodies are a complex function of both relative distance and orientation. Optical tweezers can be used to trap and move one dimensional objects [8][9][10]. In particular, holographic optical trapping has been shown to be an ideal tool for full 3D micromanipulation of microrods and nanotubes [11][12][13][14][15].…”

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confidence: 99%

Three-Dimensional to Two-Dimensional Crossover in the Hydrodynamic Interactions between Micron-Scale Rods

et al. 2011

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Moving micron scale objects are strongly coupled to each other by hydrodynamic interactions. The strength of this coupling decays as the inverse particle separation when the two objects are sufficiently far apart. It has been recently demonstrated that the reduced dimensionality of thin fluid layer gives rise to longer ranged, logarithmic coupling. Using holographic tweezers we show that microrods display both behaviors interacting like point particle in 3D at large distance and like point particles in 2D for distances shorter then their length. We derive a simple analytical expression that fits remarkably well our data and further validate it with finite element analysis.

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“…A further emerging field of their application is nanoelectromechanical systems (NEMS), where they are mainly utilized as transducers for high-resolution mass (Hanay et al, 2012) and force sensing (Sage et al, 2015). Measurements down to yoctogram (Chaste et al, 2012) and femtoNewton (Marago et al, 2008) are reported. Most of these techniques involve the dynamic-mode operation of the NW, where changes in the resonant behavior are monitored as indicators of external mechanical effects (Gil-Santos et al, 2010;Sadek et al, 2010;Yang et al, 2006).…”

Section: Introductionmentioning

confidence: 99%