| 초록 |
Previous studies have reported that amphiphilic gold nanoparticles (AuNPs) functionalized with hydrophobic and hydrophilic ligands can be accumulated at the water-oil interface. When the AuNPs accumulated at the interface, diverse adsorption behaviors were shown depending on the surface properties on AuNPs surface such as the ratio of hydrophobic and hydrophilic ligands. Here, We studied the effect of ionic interactions on the adsorption behaviors of the AuNPs at water-hexane interface. Diverse salts such as KCl, NaCl, LiCl, and tetramethylammonium chloride (TMACl) were used to change the ionic interactions between AuNPs at the interface. Based on the Langmuir isotherm model, We found that the values of the equilibrium constant (K) and maximum uptake concentration (Cmax) increased as decreasing the repulsions between AuNPs at the interface by addition of salts. As a result, the changes in the ionic interactions between AuNPs affect the adsorption behaviors of AuNPs at the interface. |
