Title :
The fluorescent signal quench in the composite structure of CdSe quantum dots and conductive polymer
Author :
Yingmin Luo ; Limin An ; Jianguang Chi ; Mingying Zhang ; Xuyu Wang
Author_Institution :
Sch. of Phys. & Optoelectron. Eng., Dalian Univ. of Technol., Dalian, China
Abstract :
CdSe quantum dots (QDs) and Polyaniline (PAni) are mixed uniformly to prepare CdSe QDs/PAni complex. PAni can quench the fluorescent signal of CdSe QDs. The fluorescent intensity of CdSe QDs/PAni complex is related to the size of CdSe QDs and concentration of PAni. Ultraviolet visual (UV-Vis) absorption spectra, fluorescence spectra, time-resolved fluorescence spectroscopy are employed to analysis the quenching phenomenon. The mechanism of fluorescence quench is dependent on two factors: on one hand, the Forster resonance energy transfer conducts from CdSe to PAni; on the other hand, PAni can intercept the electron charge of CdSe and lead to the interruption of radiative recombination.
Keywords :
II-VI semiconductors; cadmium compounds; composite materials; conducting polymers; infrared spectra; organic-inorganic hybrid materials; radiation quenching; semiconductor quantum dots; time resolved spectra; ultraviolet spectra; CdSe; Forster resonance energy transfer; QDs-PAni complex; composite structure; conductive polymer; electron charge; fluorescence spectra; fluorescent intensity; fluorescent signal quench; polyaniline; quantum dots; time-resolved fluorescence spectroscopy; ultraviolet-visual absorption spectra; CdSe; Polyaniline (PAni); charge transfer; energy transfer; fluorescence life; quantum dots (QDs);
Conference_Titel :
Communication Technology and Application (ICCTA 2011), IET International Conference on
Conference_Location :
Beijing
DOI :
10.1049/cp.2011.0822
