Effects of orthovanadate-based nanoparticles of various sizes on the aggregation behavior of polymethine dyes in aqueous solutions

- Interaction of PIN and L-21 dyes with ReVO4:Eu3+ (Re = La, Gd, Y) NPs was investigated.
- Critical coagulation concentration for PIN and L-21 dyes was determined.
- PIN dye in the presence of NPs forms H-aggregates.
- L-21 dye in the presence of NPs forms J-aggregates with 'herringbone' structure.