solution 720 u03bcl at this point the color of the solution changes from colorless to yellow which indicates the formation of cdse qds the size of the nanocrystals is controlled by the cdse time growth for the green and yellow emitting nrs the diameter of the cores is between 2 2 nm to 2 4 nm while for the red emitting nrs the diameter of the cores is between 3 0 nm to 3 4 nm cdse cds seeded nanorods were synthesized as follows in a typical nrs synthesis a solution containing of previously prepared cdse cores 8 u00d7 10 u2212 6 mole in top 1 8 ml is premixed with sulfur powder 0 02 g for the green emitting seeded nrs cores with 2 2 nm diameter were used for the red emitting seeded nrs cdse cores of a diameter of 3 3 nm were used for the seeded rods growth the core solution was injected to a reaction flask containing cadmium oxide 0 08 g topo 3 g odpa 0 29 g and hpa 0 08 g that was previously degased under vacuum at 100 u00b0 c for half an hour the injection temperature was set to 360 u00b0 c under argon the synthesis lasted for 8 minutes in which the growth of the cds rod took place the cdse cds core shell qds were synthesized by the.