Three-dimensional force microscope: A nanometric optical tracking and magnetic manipulation system for the biomedical sciences Export

@article{citeulike:1237423, abstract = {We report here the development of a three-dimensional (3D) magnetic force microscope for applying forces to and measuring responses of biological systems and materials. This instrument combines a conventional optical microscope with a free-floating or specifically bound magnetic bead used as a mechanical probe. Forces can be applied by the bead to microscopic structures of interest (specimens), while the reaction displacement of the bead is measured. This enables 3D mechanical manipulations and measurements to be performed on specimens in fluids. Force is generated by the magnetically permeable bead in reaction to fields produced by external electromagnets. The displacement is measured by interferometry using forward light scattered by the bead from a focused laser beam. The far-field interference pattern is imaged on a quadrant photodetector from which the 3D displacement can be computed over a limited range about the focal point. The bead and specimen are mounted on a 3D translation stage and feedback techniques are used to keep the bead within this limited range. We demonstrate the system with application to beads attached to cilia in human lung cell cultures. \©2005 American Institute of Physics}, author = {Fisher, J. K. and Cummings, J. R. and Desai, K. V. and Vicci, L. and Wilde, B. and Keller, K. and Weigle, C. and Bishop, G. and Taylor, R. M. and Ii and Davis, C. W. and Boucher, R. C. and O'Brien, Timothy E. and Superfine, R.}, citeulike-article-id = {1237423}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=RSINAK000076000005053711000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aip.org/link/?RSI/76/053711}, citeulike-linkout-2 = {http://dx.doi.org/10.1063/1.1914777}, doi = {10.1063/1.1914777}, journal = {Review of Scientific Instruments}, keywords = {3d, biophysics, force, magnetic, microscope, nanomanipulation, spectroscopy}, number = {5}, posted-at = {2007-04-19 19:13:17}, priority = {5}, publisher = {AIP}, title = {Three-dimensional force microscope: A nanometric optical tracking and magnetic manipulation system for the biomedical sciences}, url = {http://dx.doi.org/10.1063/1.1914777}, volume = {76}, year = {2005} }

TY - JOUR ID - citeulike:1237423 L3 - citeulike-article-id:1237423 N2 - We report here the development of a three-dimensional (3D) magnetic force microscope for applying forces to and measuring responses of biological systems and materials. This instrument combines a conventional optical microscope with a free-floating or specifically bound magnetic bead used as a mechanical probe. Forces can be applied by the bead to microscopic structures of interest (specimens), while the reaction displacement of the bead is measured. This enables 3D mechanical manipulations and measurements to be performed on specimens in fluids. Force is generated by the magnetically permeable bead in reaction to fields produced by external electromagnets. The displacement is measured by interferometry using forward light scattered by the bead from a focused laser beam. The far-field interference pattern is imaged on a quadrant photodetector from which the 3D displacement can be computed over a limited range about the focal point. The bead and specimen are mounted on a 3D translation stage and feedback techniques are used to keep the bead within this limited range. We demonstrate the system with application to beads attached to cilia in human lung cell cultures. ©2005 American Institute of Physics IS - 5 JF - Review of Scientific Instruments TI - Three-dimensional force microscope: A nanometric optical tracking and magnetic manipulation system for the biomedical sciences PB - AIP VL - 76 KW - 3d KW - biophysics KW - force KW - magnetic KW - microscope KW - nanomanipulation KW - spectroscopy AU - Fisher, JK AU - Cummings, JR AU - Desai, KV AU - Vicci, L AU - Wilde, B AU - Keller, K AU - Weigle, C AU - Bishop, G AU - Taylor, RM AU - Ii AU - Davis, CW AU - Boucher, RC AU - O'Brien, Timothy AU - Superfine, R PY - 2005/// UR - http://dx.doi.org/10.1063/1.1914777 ER -