Surface plasmon resonance in surfactant coated copper sulfide nanoparticles: Role of the structure of the capping agent

Plasmonic doped semiconductor nanocrystals: Properties, fabrication, applications and perspectives

“…[ [32,152] In all these cases, the covellite structure was progres- Various studies have shown that the adsorption of different ligands and various other molecules to the NC surface causes substantial shift to the LSPR of copper chalcogenide NCs. [151,[158][159][160][161][162][163] In a study by Wei et al [158] the effect of oxygen exposure on CuS nanodisks was investigated. CuS should be stable against oxidation, as the sulfide sublattice is already in an "oxidized" state.…”

Surface Modification of Nickel Sulfide Nanoparticles: Towards Stable Ultra‐Dispersed Nanocatalysts for Residue Hydrocracking

“…Nanoparticles tend to aggregate because of their high surface energy. Usually, surface capping by a surfactant on the surface of nanoparticles can inhibit their agglomeration during storage and under mild reaction conditions . However, it is difficult to protect nanoparticles from agglomeration under harsh reaction conditions such as high temperature and pressure.…”

“…[19] Nanoparticles tend to aggregate because of their high surface energy.U sually,s urface capping by as urfactant on the surfaceo fn anoparticles can inhibit their agglomeration during storagea nd under mild reaction conditions. [20,21] However,i ti s difficult to protect nanoparticles from agglomerationu nder harsh reactionc onditions such as high temperature and pressure. To realize this target, nanoparticles should be protected by as tronger method by using ligands such as ionic liquids, [22,23] sulfhydryl compounds, [24,25] and carbonyl compounds, [26] between whicht here is af irm interaction or reaction effect.…”

Effects of Surface Modification on the Catalytic Performances of Nickel Sulfide Nanocatalysts for Residue Hydrocracking: A Monte Carlo Simulation and Experimental Study

“…However, dispersed nanocatalysts agglomerate easily because of the high surface free energy to result in deactivation. To inhibit agglomeration, various compounds that can react or interact strongly with nanocatalysts are used commonly to modify the surface of nanocatalysts, such as surfactants, polymers, ionic liquids, and other compounds that contain sulfhydryl or carbonyl groups . In addition to the inhibition of agglomeration, another function of surface modification is to render the nanocatalysts compatible with the reaction system …”