NOVELTY - Preparing conglomerated SCNs comprise washing many SCNs in a first solution comprising a nonpolar solvent, adding the washed SCN to a second solution comprising a nonpolar solvent and agitating the SCN in the second solution; or combining many SCNs and a first polymer, where each SCNs comprises a first functional group and the first polymer comprises a second functional group that is capable of being crosslinked to the first functional group, and adding a crosslinking agent, capable of crosslinking the first polymer to SCNs, to many SCNs and the first polymer.    USE - The conglomerated SCNs are useful for preparing the hydrophilic conglomerated SCN and a composition, which is useful in an optoelectronic device, preferably LED and a solar cell (all claimed). The conglomerated SCNs are useful in a many fluorescence based systems to detect the location of a target within a sample e.g. blood, lymph, ductal fluid, tissue and cell cultures, electronic and optoelectronic devices.    ADVANTAGE - The method provides conglomerated SCNs with high chemically resilient than single nanocrystals.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) preparing a hydrophilic conglomerated SCN comprising combining the conglomerated SCN and a first polymer comprising a functional group, agitating the conglomerated SCN with the first polymer, and adding a second polymer and a crosslinking agent to the conglomerated SCN , where the second polymer comprises a functional group that is capable of being crosslinked to the first polymer, and the crosslinking agent is capable of crosslinking the first polymer to the second polymer; and    (2) a composition comprising population of the conglomerated SCNs, where the conglomerated SCNs of the population define an average nanoparticle size and a nanoparticle size within 20% of the average nanoparticle size and further comprises many individual SCNs, in which each individual SCN of the many of SCNs is associated via dipole-dipole interactions to at least one adjacent individual SCN, and each individual SCN has an emission spectra, and the conglomerated SCN retains the emission spectra of the individual SCNs.