Combined Electrostatic-Covalent Building of Au NPs Multilayers and Their Size-Enhanced Cohesive and SERS Properties

<table>Schematic representation of the charge-stabilized (citrates) colloidal gold nanoparticles (relative size of stabilizing molecules and nanoparticles are not at scale).</table>

Advances in Physical Chemistry

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Figure 4

Figure 4: Combined Electrostatic-Covalent Building of Au NPs Multilayers and Their Size-Enhanced Cohesive and SERS Properties 