Nano-encapsulation of multiple fluorophores in thin films of diblock copolymer micelles

POLY 206

Seong Il Yoo, siyoo75@snu.ac.kr, Ki-Se Kim, and Byeong-Hyeok Sohn, bhsohn@snu.ac.kr. Department of Chemistry, NANO Systems Institute, Seoul National University, Seoul, 151-747, South Korea
The fluorescence resonance energy transfer (FRET) between fluorophores can play a critical role in optoelectronic and bio systems because their luminescent properties can be controlled by regulating mutual distance between energy-absorbing donors and energy-taking acceptors. Since the FRET are strongly dependent on the mutual distance and position between donors and acceptors in a nanometer scale, the accurate control on their relative location in a thin film is crucial to achieve novel luminescent properties based on the FRET. In this study, we demonstrate selective encapsulation of multiple fluorescent dyes, which are capable of the FRET, in the cores of diblock copolymer micelles. Since the locations of three different fluorescent dyes were confined in the nanometer sized core of micelles, their mutual distance and position were accurately controlled by the utilization of the nanostructure of copolymer micelles, which resulted in the controlled light emission of fluorescent dyes based on the FRET.