Characterization of size, anisotropy, and density heterogeneity of nanoparticles by sedimentation velocity

Borries Demeler, Tich Lam Nguyen, Gary E. Gorbet, Virgil Schirf, Emre H. Brookes, Paul Mulvaney, Ala'A O. El-Ballouli, Jun Pan, Osman M. Bakr, Aysha K. Demeler, Blanca I. Hernandez Uribe, Nabraj Bhattarai, Robert L. Whetten