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Structure and Dynamics of Aqueous Dispersions of Highly-Branched Monodisperse Phytoglycogen Nanoparticles

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dc.contributor.advisor Dutcher, John Atkinson, John 2015-09-02T19:53:25Z 2015-09-02T19:53:25Z 2015-08 2015-08-25 2015-09-02
dc.description.abstract Phytoglycogen is a natural monodisperse polysaccharide nanoparticle isolated from sweet corn. The particles are highly hydrophilic resulting in high water retention, low viscosity, and extraordinary stability in water. We use neutron scattering to study the structure and dynamics of aqueous dispersions of phytoglycogen. Small angle neutron scattering (SANS) showed that the particles have uniform density with radius 17.4 ± 1.6 nm, and allowed the determination of the concentration dependence of the inter-particle spacing, and the hydration number (nH = 22.5 ± 2.5 nm per glucose monomer). Quasielastic neutron scattering showed sub-diffusive motion of the hydration water and provided an independent value of the hydration number (nH = 25.8 ± 4.6 nm per glucose monomer), in agreement with the SANS result. Taken together, the results show that between 250-285% of the hydrated particle mass is due to hydration water. en_US
dc.description.sponsorship This work was funded by grants from the Ontario Ministry of Agriculture (OMAF) and the Natural Sciences and Engineering Research Council (NSERC) of Canada (J.R.D.). J.R.D. is the recipient of a Senior Canada Research Chair in Soft Matter and Biological Physics. J.D.N. is partially supported by the U.S. DOE BES through EPSCoR Grant No. DE-FG02-08ER46528. J.K. is supported through the Scientific User Facilities Division of the DOE Office of Basic Energy Sciences under US DOE Contract No. DE-AC05-00OR22725. Facilities as the Spallation Neutron Source are managed by UT-Battelle, LLC under US DOE Contract No. DE-AC05-00OR22725. en_US
dc.language.iso en en_US
dc.publisher University of Guelph en_US
dc.rights Attribution 2.5 Canada *
dc.rights.uri *
dc.subject Colloid en_US
dc.subject Polysaccharide Nanoparticles en_US
dc.subject Dendrimer en_US
dc.subject Hydration Water en_US
dc.title Structure and Dynamics of Aqueous Dispersions of Highly-Branched Monodisperse Phytoglycogen Nanoparticles en_US
dc.type Thesis en_US Biophysics en_US Master of Science en_US Department of Physics en_US University of Guelph en_US

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