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Sedimentation of C<sub>60</sub> and C<sub>70</sub> : Testing the Limits of Stokes' Law

Sedimentation of C60 and C70 : Testing the Limits of Stokes' Law

Type of Publication: Journal article
Publication status: Published
Author: Pearson, Joseph; Nguyen, Tich Lam; Cölfen, Helmut; Mulvaney, Paul
Year of publication: 2018
Published in: The Journal of Physical Chemistry Letters ; 9 (2018), 21. - pp. 6345-6349. - eISSN 1948-7185
Pubmed ID: 30351943
DOI (citable link): https://dx.doi.org/10.1021/acs.jpclett.8b02703
Summary:
Virtually all dynamic methods for determining particle size on the nanoscale use the Stokes–Einstein–Sutherland (SES) equation to convert the diffusion coefficient into a hydrodynamic radius. The validity of this equation on the nanoscale has not been rigorously validated by experiment. Here we measure the sedimentation rates and diffusion coefficients of C60 and C70 in toluene using analytical ultracentrifugation and compare the results to the SES equation. We find that the SES equation for the drag force (nonslip boundary condition) works down to 1 nm length scales.
Subject (DDC): 540 Chemistry
Bibliography of Konstanz: Yes
Refereed: Yes

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PEARSON, Joseph, Tich Lam NGUYEN, Helmut CÖLFEN, Paul MULVANEY, 2018. Sedimentation of C60 and C70 : Testing the Limits of Stokes' Law. In: The Journal of Physical Chemistry Letters. 9(21), pp. 6345-6349. eISSN 1948-7185. Available under: doi: 10.1021/acs.jpclett.8b02703

@article{Pearson2018-11-01Sedim-44058, title={Sedimentation of C60 and C70 : Testing the Limits of Stokes' Law}, year={2018}, doi={10.1021/acs.jpclett.8b02703}, number={21}, volume={9}, journal={The Journal of Physical Chemistry Letters}, pages={6345--6349}, author={Pearson, Joseph and Nguyen, Tich Lam and Cölfen, Helmut and Mulvaney, Paul} }

2018-11-28T13:21:17Z 2018-11-01 Mulvaney, Paul Sedimentation of C<sub>60</sub> and C<sub>70</sub> : Testing the Limits of Stokes' Law Cölfen, Helmut Virtually all dynamic methods for determining particle size on the nanoscale use the Stokes–Einstein–Sutherland (SES) equation to convert the diffusion coefficient into a hydrodynamic radius. The validity of this equation on the nanoscale has not been rigorously validated by experiment. Here we measure the sedimentation rates and diffusion coefficients of C<sub>60</sub> and C<sub>70</sub> in toluene using analytical ultracentrifugation and compare the results to the SES equation. We find that the SES equation for the drag force (nonslip boundary condition) works down to 1 nm length scales. eng Mulvaney, Paul Pearson, Joseph Cölfen, Helmut 2018-11-28T13:21:17Z Nguyen, Tich Lam Nguyen, Tich Lam Pearson, Joseph

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