2018
DOI: 10.1039/c7sm01317e
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Hydrodynamic interactions in DNA thermophoresis

Abstract: We theoretically study the molecular-weight dependence of DNA thermophoresis, which arises from mutual advection of the n repeat units of the molecular chain. As a main result we find that the dominant driving forces, i.e., the thermally induced permittivity gradient and the electrolyte Seebeck effect, result in characteristic hydrodynamic screening. In comparison with recent experimental data on single-stranded DNA (2 ≤ n ≤ 80), our theory provides a good description for the increase of the drift velocity up … Show more

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Cited by 8 publications
(6 citation statements)
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“…[13][14][15]. Thermophoresis has been investigated to manipulate biomolecules [16][17][18][19][20][21][22] and cells [23], as well as colloids for more fundamental investigations [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. It can also be applied to the concentration of DNA [41] or the measurement of protein binding [42,43].…”
Section: Introductionmentioning
confidence: 99%
“…[13][14][15]. Thermophoresis has been investigated to manipulate biomolecules [16][17][18][19][20][21][22] and cells [23], as well as colloids for more fundamental investigations [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. It can also be applied to the concentration of DNA [41] or the measurement of protein binding [42,43].…”
Section: Introductionmentioning
confidence: 99%
“…In a closed system, the temperature difference between the hot and cold regions acts as a generalized force on the ions, which drives the motion. The direction of motion can be either from cold to hot ( D T < 0) or vice versa ( D T > 0). , The expression of D T can be calculated by eq S12 (see section S1 for details) D T = ε ζ 3 η T false( ψ ζ false) where ε is the permittivity, η the viscosity, ζ the zeta potential, ψ the electrostatic potential, and T the temperature. The ions are pushed toward the hot or cold region under several forces, including thermoosmosis in the electric double layer, electrostrictive force, Anderson’s chemiphoretic contribution, and thermoelectric effect, as shown in eq S12. Therefore, the sign of D T depends on the value of the properties.…”
Section: Resultsmentioning
confidence: 99%
“…The results were better resolution of the measures, the possibility of measuring Raman spectra of single molecules, of trapping them optically, control of local temperature and thermophoresis. 49,[51][52][53][54][55] In this context, the motivation of our experiments is to understand deeply the behavior of our on-chip plasmonic nanopores/nanoantennas with regard to two phenomena. First, conductance variations due to plasmons, when they are excited by specific wavelength illumination, and, second, translocations of NPs and DNA (i.e., charged objects that can behave as data-storing media 56 ) that are passing through the nanochannels, when accelerated by a bias voltage.…”
Section: Introductionmentioning
confidence: 99%