2.3. Preparation of PDMS films
Films of PDMS were prepared according to a standard protocol. PDMS prepolymer and curing agent were mixed together in a 10:1 ratio and cured at 50 ◦C for 12 h. To incoporate QDs in PDMS, films of PDMS were immersed in dichloromethane containing CdSe/CdS QDs (OD570 = 0.3) for 2 h at 4 ◦C. Then, the films were withdrawn from the solution, rinsed with acetone and blown dried.