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- W1982603622 endingPage "4580" @default.
- W1982603622 startingPage "4570" @default.
- W1982603622 abstract "Self-assembled monolayer (SAM) modification is a widely used method to improve the functionality and stability of bulk and nanoscale materials. For instance, the chemical compatibility and utility of solution-phase nanoparticles are often improved using covalently bound SAMs. Herein, solution-phase gold nanoparticles are modified with thioctic acid SAMs in the presence and absence of salt. Molecular packing density on the nanoparticle surfaces is estimated using X-ray photoelectron spectroscopy and increases by ∼20% when molecular self-assembly occurs in the presence versus the absence of salt. We hypothesize that as the ionic strength of the solution increases, pinhole and collapsed-site defects in the SAM are more easily accessible as the electrostatic interaction energy between adjacent molecules decreases, thereby facilitating the subsequent assembly of additional thioctic acid molecules. Significantly, increased SAM packing densities increase the stability of functionalized gold nanoparticles by a factor of 2 relative to nanoparticles functionalized in the absence of salt. These results are expected to improve the reproducible functionalization of solution-phase nanomaterials for various applications." @default.
- W1982603622 created "2016-06-24" @default.
- W1982603622 creator A5006535047 @default.
- W1982603622 creator A5007214783 @default.
- W1982603622 creator A5016148068 @default.
- W1982603622 creator A5070385211 @default.
- W1982603622 creator A5082464687 @default.
- W1982603622 date "2011-05-03" @default.
- W1982603622 modified "2023-10-02" @default.
- W1982603622 title "Salt-Mediated Self-Assembly of Thioctic Acid on Gold Nanoparticles" @default.
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