Optical Torque Wrench: Angular Trapping, Rotation, and Torque Detection of Quartz Microparticles Export

@article{citeulike:1505779, abstract = {We describe an apparatus that can measure the instantaneous angular displacement and torque applied to a quartz particle which is angularly trapped. Torque is measured by detecting the change in angular momentum of the transmitted trap beam. The rotational Brownian motion of the trapped particle and its power spectral density are used to determine the angular trap stiffness. The apparatus features a feedback control that clamps torque or other rotational quantities. The torque sensitivity demonstrated is ideal for the study of known biological molecular motors.}, author = {La Porta, Arthur and Wang, Michelle D.}, citeulike-article-id = {1505779}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000092000019190801000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v92/e190801}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevLett.92.190801}, doi = {10.1103/PhysRevLett.92.190801}, journal = {Physical Review Letters}, keywords = {angular, detection, microparticles, optical, quartz, rotational, torque}, number = {19}, posted-at = {2007-07-26 21:11:36}, priority = {4}, publisher = {APS}, title = {Optical Torque Wrench: Angular Trapping, Rotation, and Torque Detection of Quartz Microparticles}, url = {http://dx.doi.org/10.1103/PhysRevLett.92.190801}, volume = {92}, year = {2004} }

TY - JOUR ID - citeulike:1505779 L3 - citeulike-article-id:1505779 N2 - We describe an apparatus that can measure the instantaneous angular displacement and torque applied to a quartz particle which is angularly trapped. Torque is measured by detecting the change in angular momentum of the transmitted trap beam. The rotational Brownian motion of the trapped particle and its power spectral density are used to determine the angular trap stiffness. The apparatus features a feedback control that clamps torque or other rotational quantities. The torque sensitivity demonstrated is ideal for the study of known biological molecular motors. IS - 19 JF - Physical Review Letters TI - Optical Torque Wrench: Angular Trapping, Rotation, and Torque Detection of Quartz Microparticles PB - APS VL - 92 KW - angular KW - detection KW - microparticles KW - optical KW - quartz KW - rotational KW - torque AU - La Porta, Arthur AU - Wang, Michelle PY - 2004/// UR - http://dx.doi.org/10.1103/PhysRevLett.92.190801 ER -