Physical principles of the formation of a nanoparticle electric double layer in metal hydrosols
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The Brownian dynamics method is employed to study the formation of an electrical double layer (EDL) on the metal nanoparticle (NP) surface in hydrosols during adsorption of electrolyte ions from the interparticle medium. Also studied is the charge accumulation by NPs in the Stern layer. To simulate the process of the formation of EDL, we took into account the effect of image forces and specific adsorption, dissipative and random forces, and the degree of hydration of adsorbed ions on the EDL structure. The employed model makes it possible to determine the charge of NPs and the structure of EDL. For the first time, the charge of both the diffuse part of EDL and the dense Stern layer has been determined. A decrease in the electrolyte concentration (below c < 0.1 mol/l) has been found to result in dramatic changes in the formation of the Stern layer.
KeywordsNanoparticle Adsorption layer Elastic deformation Coagulation kinetics Elasticity modulus
The reported research was funded by the Russian Foundation for Basic Research and the government of the Krasnoyarsk territory, Krasnoyarsk Regional Fund of Science, grant No 18-42-243023, the RF Ministry of Education and Science, the State contract with Siberian Federal University for scientific research in 2017–2019.
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Conflict of interests
The authors confirm that there are no known conflicts of interest associated with this publication.
- 1.Rao C. N. R., Müller A, Cheetham AK (eds) (2004) The chemistry of nanomaterials. Wiley-VCH Verlag GmbH & Co. KGaA, WeinheimGoogle Scholar
- 2.Sonntag H, Strenge K (1970) Koagulation und stabilität disperser Systeme, 173 S., VEB Deutscher Verlag der Wissenschaften, vol 73. Preis: 30.80 MDN, Berlin, p 1971Google Scholar
- 3.French RH, Parsegian VA, Podgornik R, Rajter RF, Jagota A, Luo J, Asthagiri D, Chaudhury MK, Chiang Y-M, Granick S, Kalinin S, Kardar M, Kjellander R, Langreth DC, Lewis J, Lustig S, Wesolowski D, Wettlaufer JS, Ching W-Y, Finnis M, Houlihan F, von Lilienfeld OA, van Oss CJ, Zemb T (2010) Long range interactions in nanoscale science. Rev Modern Phys 82:1887–1944,6CrossRefGoogle Scholar
- 5.Linse P (2005) Simulation of charged colloids in solutionGoogle Scholar
- 11.Gan Z, Xing X, Xu Z (2012) Effects of image charges, interfacial charge discreteness, and surface roughness on the zeta potential of spherical electric double layers. J Chem Phys 137:169901, 10Google Scholar
- 14.Izraelashvili JN (2011) Intermolecular and surface forces. Elsevier, AmsterdamGoogle Scholar