BROWSE

Related Researcher

Author

Bae, Sung Chul
Multiscale Optical Imaging Lab
Research Interests
  • Multiscale optical imaging, laser spectroscopy, laser microscopy, laser sensing, soft matter physics, surface and interfacial science, laser Matter Interaction

ITEM VIEW & DOWNLOAD

How Liposomes Diffuse in Concentrated Liposome Suspensions

Cited 6 times inthomson ciCited 6 times inthomson ci
Title
How Liposomes Diffuse in Concentrated Liposome Suspensions
Author
Yu, YanAnthony, Stephen M.Bae, Sung ChulGranick, Steve
Keywords
Anomalous diffusion; Brownian motion; Cationic nanoparticles; Colloid systems; Fluorescence imaging; Mean square displacement; Single-particle; Time-scaling; Zwitterionic lipids
Issue Date
201103
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY B, v.115, no.12, pp.2748 - 2753
Abstract
Building upon the observation that liposomes of zwitter-ionic lipids can be stabilized against fusion by the adsorption of cationic nanoparticles (Yu, Y.; Anthony, S.; Zhang, L.; Bae, S. C.; Granick, S. J. Phys. Chem. C 2007, 111, 8233), we study, using single-particle fluorescence tracking, mobility in this distinctively deformable colloid system, in the volume fraction range of phi = 0.01 to 0.7. Liposome motion is diffusive and homogeneous at low volume fractions, but separable fast and slow populations emerge as the volume fraction increases beyond phi approximate to 0.45, the same volume fraction at which hard colloids with sufficiently strong attraction, are known to experience gelation. This is reflected not only in scaling of the mean square displacement, but also in the step size distribution (van Hove function) measured by fluorescence imaging. The fast liposomes are observed to follow Brownian motion, and the slow ones follow anomalous diffusion characterized by a 1/3 time scaling of their mean square displacement.
URI
Go to Link
DOI
http://dx.doi.org/10.1021/jp109146s
ISSN
1520-6106
Appears in Collections:
SLS_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU