Synthesis and photoluminescence (PL) of colloidal MAA-capped ZnSe and ZnSe:Cu quantum dots
(QDs) is investigated here. The size of QDs is varied tunably by changing the pH, MWIR time and
Cu dopant percentage. Results show that the as-synthesized ZnSe QDs and doped QDs (dQDs)
have similar cubic zinc blend structure. PL properties is synthesis condition-sensitive in which
can be controlled by them, suggesting applications in bio-sensors. It was founded that, PL peak
positions had red shift and PL intensities increase commonly as pH increases for different MWIR
times; relatively such trend could be observed with increase of Cu dopant. It is suggested that
MAA dissociates from the ZnSe outer shell at higher pH, resulting in aggregation and loss of
solubility and can change the fluorescence of the MAA-capped QDs. Also, Cu ions as doping agent
may be the centers of energy transfer role in the lattice. Generally, PL intensity increases slightly
by increasing in pH, and MW irradiation time. Linear decremental, non-linear variation, and
nonlinear decremental trends of optical gap were identified at different mentioned synthesis
conditions, correspondingly. In brief, the studied QDs promises a novel range of green-emission
luminescent QDs for development of nano-probes in bio-imaging applications.