Nanometer gold–silica composite particles manipulated by optical tweezers Export

@article{citeulike:4920809, abstract = {We have studied the behavior of nano or micro size composite particles submitted to optical trapping forces and a comparison was made with homogeneous particles of similar dimension. The forces were measured using the power spectrum signal analysis. Most of the results presented were obtained using a lateral effect position sensitive detector (PSD), which allowed the fluctuations of the particle position in the optical trap to be monitored. A 4-quadrant photodiode was also used for the same purpose. We bring clear experimental evidence that the trapping force was increased by a factor of about 2–3 for composite particles made of a colloidal gold core encapsulated in a silica shell, with respect to homogeneous silica or latex beads. These results were discussed in the frame of the various approaches currently used for modeling optical tweezing forces.}, author = {Rodriguez-Otazo, Mariela and Augier-Calderin, Angel and Galaup, Jean-Pierre}, citeulike-article-id = {4920809}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.optcom.2009.04.005}, citeulike-linkout-1 = {http://linkinghub.elsevier.com/retrieve/pii/S0030401809003356}, day = {15}, doi = {10.1016/j.optcom.2009.04.005}, issn = {00304018}, journal = {Optics Communications}, keywords = {citedby2, citedby3, core-shell, gold, hybrid, nanoparticles, optical, silica, trap, tweezers}, month = {July}, number = {14}, pages = {2921--2929}, posted-at = {2009-06-22 04:40:19}, priority = {4}, title = {Nanometer gold–silica composite particles manipulated by optical tweezers}, url = {http://dx.doi.org/10.1016/j.optcom.2009.04.005}, volume = {282}, year = {2009} }

TY - JOUR ID - citeulike:4920809 L3 - citeulike-article-id:4920809 N2 - We have studied the behavior of nano or micro size composite particles submitted to optical trapping forces and a comparison was made with homogeneous particles of similar dimension. The forces were measured using the power spectrum signal analysis. Most of the results presented were obtained using a lateral effect position sensitive detector (PSD), which allowed the fluctuations of the particle position in the optical trap to be monitored. A 4-quadrant photodiode was also used for the same purpose. We bring clear experimental evidence that the trapping force was increased by a factor of about 2–3 for composite particles made of a colloidal gold core encapsulated in a silica shell, with respect to homogeneous silica or latex beads. These results were discussed in the frame of the various approaches currently used for modeling optical tweezing forces. IS - 14 JF - Optics Communications SN - 00304018 EP - 2929 TI - Nanometer gold–silica composite particles manipulated by optical tweezers VL - 282 SP - 2921 KW - citedby2 KW - citedby3 KW - core-shell KW - gold KW - hybrid KW - nanoparticles KW - optical KW - silica KW - trap KW - tweezers AU - Rodriguez-Otazo, Mariela AU - Augier-Calderin, Angel AU - Galaup, Jean-Pierre PY - 2009/07/15/ UR - http://dx.doi.org/10.1016/j.optcom.2009.04.005 ER -