posted on 2018-04-12, 00:00authored byShilaj Roy, Mihir Manna, Arun Chattopadhyay
This work demonstrates
preferential transfer of 8-hydroxyquinoline-5-sulfonic
acid (HQS) from surface of ZnO quantum dots to ZnS quantum dots in
the form of Zn(QS)2 complex. This is an instance of inter
quantum dot complex or Z-type ligand transfer that depends on solvent
systemmore precisely, solubility of the migrating complex.
The migration can be explained using Langmuir model by considering
two parallel adsorption equilibria on ZnO and ZnS surfaces. We also
propose that higher stability of the zinc quinolato complex on ZnS
surface in comparison to that of ZnO is the driving force of the reaction.