Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Ag nanoparticles/PPV composite nanofibers with high and sensitive opto-electronic response | Chen et al. Nanoscale Research Letters 2011 6 121 http content 6 1 121 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Ag nanoparticles PPV composite nanofibers with high and sensitive opto-electronic response 1 1 2 1 1 1 1 Jinfeng Chen Peipei Yang Chunjiao Wang Sumei Zhan Lianji Zhang Zonghao Huang Wenwen Li Cheng Wang1 3 Zijiang Jiang1 Chen Shao1 Abstract 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 n 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 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. Introduction Recently 1D opto-electronic nanomaterials especially the 1D organic opto-electronic nanomaterials have received much attention of scientists because of their distinctive geometries novel opto-electronic properties and the potential application in nano micro devices 1-5 . Electrospinning is an efficient technique for the fabrication of 1D polymer-based nanomaterials. Up to now a lot of polymers and polymer-based composite materials have been fabricated by electrospinning 5-7 . Poly p-phenylene vinylene PPV is a typical conjugated polymer which has good photoluminescent
