Resumen:
n this work, a dendronization strategy was used to control interparticle spacing and the optical properties
of gold nanoparticle (NP) aggregates in aqueous media. To achieve this goal, two dendritic disulfides
bearing different functionalities on their periphery were synthesized and used as ligands to dendronize
gold NPs. The dendronized NPs then undergo aggregation; this process was followed by UV?vis spectroscopy,
dynamic light scattering (DLS), and transmission electronic microscopy (TEM) measurements and
correlated with Generalized Mie Theory electrodynamics calculations. For comparison, NP functionalization
was also studied using a nondendritic ligand. It was found that the use of dendritic disulfides allows
for the preparation of controlled NP aggregates. This study demonstrates how different dendronization
parameters, such as disulfide concentration, temperature, time and nature of the ligand (dendritic vs nondendritic),
determine the control exerted over the size and