Rotational and translational diffusion of copper oxide nanorods measured with holographic video microscopy.
We use holographic video microscopy to track the three-imensional translational and rotational diffusion of copper oxide nanorods suspended in water. Rayleigh-Sommerfeld back-propagation of a single holographic snapshot yields a volumetric reconstruction of the nanorod's optical scattering pattern, from which we estimate both its dimensions and also its instantaneous position and orientation. Analyzing a video sequence yields measurements of the freely diffusing nanorod's dynamics, from which we estimate the technique's resolution.
Cheong
Fook Chiong
FC
Department of Physics and Center for Soft Matter Research, New York University, New York, NY 10003, USA.
Grier
David G
DG
D003300:Copper / Q000737:chemistry*; D004058:Diffusion; D004867:Equipment Design; D006696:Holography / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry*; D018715:Microscopy, Video / Q000379:methods*; D015233:Models, Statistical; D043942:Nanotubes / Q000737:chemistry*; D055095:Optics and Photonics; D010825:Physics / Q000379:methods; D012542:Scattering, Radiation; D013997:Time Factors
D003300:Copper; C000520:cuprous oxide