Tribo-Dependent Photoluminescent Behavior of Oleylamine-Modified AgInS2 and AgInS2-ZnS Nanoparticles as Lubricant Additives

The content of Cu2+ in lubricants is an essential indicator for determining the quality lubricant and predicting mechanical failure. Finding effective sensitive method detecting great importance oil monitoring. In this work, AgInS2 (AIS) AgInS2-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification oleylamine. as-synthesized AIS ZAIS NPs exhibit good dispersion stability various apolar media. photoluminescence (PL) as lubricating additives could reflect monitor lubrication state steel-copper pairs due to quenching effect from friction process. With optimum concentration 0.5 wt% paraffin oil, coefficient at 100 N was decreased 56.8 52.1% steel-steel contacts, respectively. observed be more than improving anti-wear (AW) extreme pressure (EP) properties, with load-bearing capacity up 1100 N. Characterization wear tracks SEM XPS indicates that tribofilm composed metal sulfides oxides formed during This work not only reveals new class promising candidates but also unveils their potential monitoring conditions exploring service life.