Coglitore, Diego1; Edwardson, Stuart P.2; Macko, Peter3, 1; Patterson, Eann A.2; Whelan, Maurice3, 1

Published Nov 03, 2017 on Dryad. https://doi.org/10.5061/dryad.db56v

Abstract

An optical technique for tracking single particles has been used to evaluate the particle diameter at which diffusion transitions from molecular behaviour described by the fractional Stokes-Einstein relationship to particle behaviour described by the classical Stokes-Einstein relationship. The results confirm a prior prediction from molecular dynamic simulations that there is a particle size at which transition occurs and show it is inversely dependent on concentration and viscosity but independent of particle density. For concentrations in the range 510-3 to 510-6mg/mL and viscosities from 0.8 to 150 mPa s, the transition was found to occur in the diameter range 150 to 300nm.

polystyrene_20nm_low-concentration_water

single particle tracking on a 20nm polystyrene nanoparticle dispersed in water represented by single caustic

polystyrene_20nm_low-concentration.avi

polystyrene_30nm_low-concentration_water

single particle tracking on a 30nm polystyrene nanoparticle dispersed in water represented by single caustic

polystyrene_60nm_low-concentration_water

single particle tracking on a 60nm polystyrene nanoparticle dispersed in water represented by single caustic

polystyrene_80nm_low-concentration_water

single particle tracking on a 80nm polystyrene nanoparticle dispersed in water represented by single caustic

polystyrene_150nm_low-concentration_water

single particle tracking on a 150nm polystyrene nanoparticle dispersed in water represented by single caustic

polystyrene_300nm_low-concentration_water

single particle tracking on a 300nm polystyrene nanoparticle dispersed in water represented by single caustic

polystyrene_500nm_low-concentration_water

single particle tracking on a 500nm polystyrene nanoparticle dispersed in water represented by single caustic

polystyrene_20nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 20nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

polystyrene_30nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 30nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

polystyrene_50nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 50nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

polystyrene_60nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 60nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

polystyrene_80nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 80nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

polystyrene_150nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 150nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

polystyrene_300nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 300nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

polystyrene_500nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 500nm polystyrene nanoparticle represente by a single caustic dispersed in a glycerol-water mixture (90% of glycerol)

StAT_basic_2009a

labview based software that allows nanoparticle tracking with sub-nanometer precision. The caustic change of intensity can be taken in account by the software.

polystyrene_free_60nm_low-concentration_water

single particle tracking of a 60nm free-surfactant polystyrene nanoparticle represented by a single caustic dispersed in water

polystyrene_free_80nm_low-concentration_water

single particle tracking of a 80nm free-surfactant polystyrene nanoparticle represented by a single caustic dispersed in water

polystyrene_free_60nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 60nm free-surfactant polystyrene nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (9:1)

polystyrene_free_80nm_low-concentration_glycerol-water_9_to_1

single particle tracking of a 80nm free-surfactant polystyrene nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (9:1)

gold_10nm_low-concentration water

single particle tracking of a 10nm gold nanoparticle represented by a single caustic dispersed in water

gold_20nm_low-concentration water

single particle tracking of a 20nm gold nanoparticle represented by a single caustic dispersed in water

gold_30nm_low-concentration water

single particle tracking of a 30nm gold nanoparticle represented by a single caustic dispersed in water

gold_50nm_low-concentration water

single particle tracking of a 50nm gold nanoparticle represented by a single caustic dispersed in water

gold_80nm_low-concentration water

single particle tracking of a 80nm gold nanoparticle represented by a single caustic dispersed in water

gold_10nm_low-concentration_glycerol_water_9_to_1

single particle tracking of a 10nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (9:1)

gold_20nm_low-concentration_glycerol_water_9_to_1

single particle tracking of a 20nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (9:1)

gold_30nm_low-concentration_glycerol_water_9_to_1

single particle tracking of a 30nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (9:1)

gold_50nm_low-concentration_glycerol_water_9_to_1

single particle tracking of a 50nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (9:1)

gold_80nm_low-concentration_glycerol_water_9_to_1

single particle tracking of a 80nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (9:1)

gold_10nm_low-concentration_glycerol_water_2_to_8

single particle tracking of a 10nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (2:8)

gold_20nm_low-concentration_glycerol_water_2_to_8

single particle tracking of a 20nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (2:8)

gold_30nm_low-concentration_glycerol_water_2_to_8

single particle tracking of a 30nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (2:8)

gold_50nm_low-concentration_glycerol_water_2_to_8

single particle tracking of a 50nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (2:8)

gold_80nm_low-concentration_glycerol_water_2_to_8

single particle tracking of a 80nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (2:8)

gold_10nm_low-concentration_glycerol_water_5_to_5

single particle tracking of a 10nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (5:5)

gold_20nm_low-concentration_glycerol_water_5_to_5

single particle tracking of a 20nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (5:5)

gold_30nm_low-concentration_glycerol_water_5_to_5

single particle tracking of a 30nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (5:5)

gold_50nm_low-concentration_glycerol_water_5_to_5

single particle tracking of a 50nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (5:5)

gold_80nm_low-concentration_glycerol_water_5_to_5

single particle tracking of a 80nm gold nanoparticle represented by a single caustic dispersed in a glycerol-water mixture (5:5)

Data from: Transition from fractional to classical Stokes-Einstein behaviour in simple fluids

Data files