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Published on: April 11, 2020
Adsorption isotherms of charged nanoparticles
Alexandre P Dos Santos1, Amin Bakhshandeh1, Alexandre Diehl2
1Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil. alexandre.pereira@ufrgs.br bakhshandeh.amin@gmail.com levin@if.ufrgs.br.
Abstract:
We present theory and simulations which allow us to quantitatively calculate the amount of surface adsorption excess of charged nanoparticles onto a charged surface. The theory is very accurate for weakly charged nanoparticles and can be used at physiological concentrations of salt. We have also developed an efficient simulation algorithm which can be used for dilute suspensions of nanoparticles of any charge, even at very large salt concentrations. With the help of the new simulation method, we are able to efficiently calculate the adsorption isotherms of highly charged nanoparticles in suspensions containing multivalent ions, for which there are no accurate theoretical methods available.
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