Nakanishi, Hideyuki and Deák, András and Holló, Gábor and Lagzi, István (2018) Existence of a Precipitation Threshold in the Electrostatic Precipitation of Oppositely Charged Nanoparticles. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 57 (49). pp. 16062-16066. ISSN 1433-7851 (print); 1521-3773 (online)
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Abstract
Oppositely charged nanoparticles precipitate rapidly only at the point of electroneutrality, wherein their charges are macroscopically compensated. We investigated the aggregation and precipitation of oppositely charged nanoparticles at concentrations ranging from 10 to 10-3 mM (based on gold atoms) by using UV-vis measurements. We employed solutions of equally sized (4.6 nm) gold nanoparticles, which were functionalized and stabilized with either positively or with negatively charged alkanethiols. Results showed that oppositely charged nanoparticles do not precipitate if their concentration is below a certain threshold even if the electroneutrality condition is fulfilled. This finding suggests the universal behavior of chemical systems comprising oppositely charged building blocks such as ions and charged nanoparticles.
Item Type: | Article |
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Uncontrolled Keywords: | aggregation, nanoparticles, nanostructures, precipitation, self-assembly |
Subjects: | Q Science / természettudomány > QD Chemistry / kémia > QD02 Physical chemistry / fizikai kémia |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 15 Nov 2019 12:43 |
Last Modified: | 15 Nov 2019 12:43 |
URI: | http://real.mtak.hu/id/eprint/103297 |
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