Diffusive dynamics of nanoparticles in aqueous dispersions

Kai He; Melissa Spannuth; Jacinta C. Conrad; Ramanan Krishnamoorti

doi:10.1039/c2sm26392k

Diffusive dynamics of nanoparticles in aqueous dispersions

Kai He, Melissa Spannuth, Jacinta C. Conrad, Ramanan Krishnamoorti

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

The diffusive dynamics of 100 nm to 400 nm diameter polystyrene nanoparticles dispersed in water were studied using brightfield and fluorescence based differential dynamic microscopy (DDM) and compared to those obtained from dynamic light scattering. The relaxation times measured with brightfield and fluorescence DDM over a broad range of concentration of nanoparticles (10 -6 ≤ φ ≤ 10-3) and scattering vectors (0.5 μm-1 < q < 10 μm-1) are in excellent agreement with each other and extrapolate quantitatively to those obtained from DLS measurements. The diffusion coefficients extracted from the q-dependent relaxation times using all three methods are independent of the nanoparticle concentration. © 2012 The Royal Society of Chemistry.

Original language	English (US)
Pages (from-to)	11933
Journal	Soft Matter
Volume	8
Issue number	47
DOIs	https://doi.org/10.1039/c2sm26392k
State	Published - 2012
Externally published	Yes

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@article{8eb820dd19f540a2a498299fb81f8015,

title = "Diffusive dynamics of nanoparticles in aqueous dispersions",

abstract = "The diffusive dynamics of 100 nm to 400 nm diameter polystyrene nanoparticles dispersed in water were studied using brightfield and fluorescence based differential dynamic microscopy (DDM) and compared to those obtained from dynamic light scattering. The relaxation times measured with brightfield and fluorescence DDM over a broad range of concentration of nanoparticles (10 -6 ≤ φ ≤ 10-3) and scattering vectors (0.5 μm-1 < q < 10 μm-1) are in excellent agreement with each other and extrapolate quantitatively to those obtained from DLS measurements. The diffusion coefficients extracted from the q-dependent relaxation times using all three methods are independent of the nanoparticle concentration. {\textcopyright} 2012 The Royal Society of Chemistry.",

author = "Kai He and Melissa Spannuth and Conrad, {Jacinta C.} and Ramanan Krishnamoorti",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1-018-02 Acknowledgements: We thank Prof. J. Rimer for the use of the DLS instrumentation. This publication is based on the work supported in part by award no. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2012",

doi = "10.1039/c2sm26392k",

language = "English (US)",

volume = "8",

pages = "11933",

journal = "Soft Matter",

issn = "1744-683X",

publisher = "Royal Society of Chemistry",

number = "47",

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TY - JOUR

T1 - Diffusive dynamics of nanoparticles in aqueous dispersions

AU - He, Kai

AU - Spannuth, Melissa

AU - Conrad, Jacinta C.

AU - Krishnamoorti, Ramanan

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1-018-02 Acknowledgements: We thank Prof. J. Rimer for the use of the DLS instrumentation. This publication is based on the work supported in part by award no. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2012

Y1 - 2012

N2 - The diffusive dynamics of 100 nm to 400 nm diameter polystyrene nanoparticles dispersed in water were studied using brightfield and fluorescence based differential dynamic microscopy (DDM) and compared to those obtained from dynamic light scattering. The relaxation times measured with brightfield and fluorescence DDM over a broad range of concentration of nanoparticles (10 -6 ≤ φ ≤ 10-3) and scattering vectors (0.5 μm-1 < q < 10 μm-1) are in excellent agreement with each other and extrapolate quantitatively to those obtained from DLS measurements. The diffusion coefficients extracted from the q-dependent relaxation times using all three methods are independent of the nanoparticle concentration. © 2012 The Royal Society of Chemistry.

AB - The diffusive dynamics of 100 nm to 400 nm diameter polystyrene nanoparticles dispersed in water were studied using brightfield and fluorescence based differential dynamic microscopy (DDM) and compared to those obtained from dynamic light scattering. The relaxation times measured with brightfield and fluorescence DDM over a broad range of concentration of nanoparticles (10 -6 ≤ φ ≤ 10-3) and scattering vectors (0.5 μm-1 < q < 10 μm-1) are in excellent agreement with each other and extrapolate quantitatively to those obtained from DLS measurements. The diffusion coefficients extracted from the q-dependent relaxation times using all three methods are independent of the nanoparticle concentration. © 2012 The Royal Society of Chemistry.

UR - http://hdl.handle.net/10754/597976

UR - http://xlink.rsc.org/?DOI=c2sm26392k

UR - http://www.scopus.com/inward/record.url?scp=84872726488&partnerID=8YFLogxK

U2 - 10.1039/c2sm26392k

DO - 10.1039/c2sm26392k

M3 - Article

SN - 1744-683X

VL - 8

SP - 11933

JO - Soft Matter

JF - Soft Matter

IS - 47

ER -

Diffusive dynamics of nanoparticles in aqueous dispersions

Abstract

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