Abstract
This research investigates the role of salt in the spontaneous assembly of charged gold nanoparticles in ethanol and tries to clear up a misunderstanding on ethanol effect in this process. In lots of literature, ethanol was considered as a main factor to make charged gold nanoparticles aggregated. However, after an elaborate exploration of the assembly by UV-Vis, TEM, and DLS, we found that it is the residual salt, instead of ethanol itself, which induces the linear aggregation of the gold nanoparticles in ethanol due to the decrease of electrostatic repulsion force interparticles. Further, we found that the chainlike aggregates triggered by salt could dissociate by diluting salt concentration or evaporating the ethanol in it. We expect this work can cast some light on the mechanism of spontaneous assembly of nanoparticles in ethanol.
| Original language | English |
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| Journal | ACS National Meeting Book of Abstracts |
| State | Published - 2011 |
| Externally published | Yes |
| Event | 241st ACS National Meeting and Exposition - Anaheim, CA, United States Duration: 27 Mar 2011 → 31 Mar 2011 |