Assembly and force measurement with SPM-like probes in holographic optical tweezers

Ikin, L., Carberry, D. M., Gibson, G. M., Padgett, M. J. and Miles, M. J. (2009) Assembly and force measurement with SPM-like probes in holographic optical tweezers. New Journal of Physics, 11 . doi:10.1088/1367-2630/11/2/023012


Author Ikin, L.
Carberry, D. M.
Gibson, G. M.
Padgett, M. J.
Miles, M. J.
Title Assembly and force measurement with SPM-like probes in holographic optical tweezers
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2009-02-06
Sub-type Article (original research)
DOI 10.1088/1367-2630/11/2/023012
Open Access Status DOI
Volume 11
Total pages 8
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Formatted abstract
In this paper we demonstrate the optical assembly and control of scanning probe microscopy (SPM)-like probes, using holographic optical tweezers. The probes are formed from cadmium sulphide rods and silica microspheres, the latter providing explicit trapping handles. Calibration of the trap stiffness allows us to use a precise measure of probe displacement to calculate the applied forces. We demonstrate that the optically controlled probe can exert a force in excess of 60 pN, over an area of 1×10−13 m2, with a force sensitivity of 50 fN. We believe that probes similar to the ones presented here will have applications as nanotools in probing laser-sensitive cells/materials.
Keyword Manipulation
Microscopy
Traps
Nanowires
Nanotubes
Cells
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article number 023012.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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