ZB 10 - Soft Condensed Matter (R. Holyst)

Diffusion and viscosity in a crowded environment: From nano- to macroscale

Author(s): Szymanski, Jedrzej and Patkowski, Adam and Wilk, Agnieszka and Garstecki, Piotr and Holyst, Robert
Title: Diffusion and viscosity in a crowded environment: From nano- to macroscale
Abstract: Although water is the chief component of living cells, food, and care products, the supramolecular components make their larger than that of water by several orders of magnitude. fluorescence correlation spectroscopy (FCS), photon correlation (PCS), NMR, and rheology data, we show how the viscosity from the value for water at the molecular scale to the large We determined the viscosity experienced by nanoprobes sizes from 0.28 to 190 nm) in aqueous micellar solution of (in a range of concentration from w/w to 35\% w/w) and identified a clear crossover at the length of 17 +/- 2 nm (slightly larger than persistence length of at which viscosity acquires its macroscopic value. The sharp of the viscosity coefficients on the size of the probe in the has important consequences for diffusion-limited reactions in crowded environments (e.g., living cells).
Pages: 25593-25597
Journal: JOURNAL OF PHYSICAL CHEMISTRY B
Volume: 110
ID: ISI:000242974300010
Year: 2006
DOI: 10.1021/jp0666784