Figure 2

(a) The color change of separate and complex molecules in the absence and presence of NaCl. Cationic conjugated polymer and FITC-labelled M13 phage were used as the donor and acceptor, respectively. (b) The optical properties of CdSSe/ZnS QD (donor) and FITC (acceptor)-labeled M13 bacteriophage. Dotted line indicates Gaussian curve fitting of NQDs’ emission.