Ag nanoparticles/PPV composite nanofibers with high and sensitive opto-electronic response
1 Faculty of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
2 Bilingual Teaching Training Center, Changchun Normal University, Changchun 130032, People's Republic of China
3 Faculty of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, People's Republic of China
Nanoscale Research Letters 2011, 6:121 doi:10.1186/1556-276X-6-121Published: 7 February 2011
The novel Ag nanoparticles/poly(p-phenylene vinylene) [PPV] composite nanofibers were prepared by electrospinning. The transmission electron microscope image shows that the average diameter of composite fibers is about 500 nm and Ag nanoparticles are uniformly dispersed in the PPV matrix with an average diameter of about 25 nm. The Fourier transform infrared spectra suggest that there could be a coordination effect to a certain extent between the Ag atom and the π system of PPV, which is significantly favorable for the dissociation of photoexcitons and the charge transfer at the interface between the Ag nanoparticle and the PPV. The Au top electrode device of the single Ag/PPV composite nanofiber exhibits high and sensitive opto-electronic responses. Under light illumination of 5.76 mW/cm2 and voltage of 20 V, the photocurrent is over three times larger than the dark current under same voltage, which indicates that this kind of composite fiber is an excellent opto-electronic nanomaterial.