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Ag nanoparticles/PPV composite nanofibers with high and sensitive opto-electronic response.

Chen J, Yang P, Wang C, Zhan S, Zhang L, Huang Z, Li W, Wang C, Jiang Z, Shao C - Nanoscale Res Lett (2011)

Bottom Line: The novel Ag nanoparticles/poly(p-phenylene vinylene) [PPV] composite nanofibers were prepared by electrospinning.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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Faculty of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China. huangzh295@nenu.edu.cn.

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 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.

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Photocurrent of the composite nanofiber. J-V curves of the single Ag/PPV composite nanofiber under light illumination with different intensities.
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Figure 7: Photocurrent of the composite nanofiber. J-V curves of the single Ag/PPV composite nanofiber under light illumination with different intensities.

Mentions: The I-V characteristics of the device were measured under light illumination from a Xe lamp with different intensities at room temperature in the shielded box. Figure 7 shows that the photocurrent of the composite nanofiber obviously increases with increasing the light intensity from 0 to 5.76 mW/cm2. The I-V curves in Figure 7 show the non-ohmic character, which is consistent with the I-V curves of PPV and its composite film devices [17]. Under light illumination of 5.76 mW/cm2 and voltage of 20 V, the photocurrent is over three times larger than the dark current, which indicates that the composite nanofibers have high and sensitive opto-electronic response. The reason for the improvement (or enhancement) of the opto-electronic response of the composite nanofiber should be attributed to the following factor: there is the coordination effect to a certain extent between the Ag atom and the π system of PPV mentioned in "FTIR spectra."


Ag nanoparticles/PPV composite nanofibers with high and sensitive opto-electronic response.

Chen J, Yang P, Wang C, Zhan S, Zhang L, Huang Z, Li W, Wang C, Jiang Z, Shao C - Nanoscale Res Lett (2011)

Photocurrent of the composite nanofiber. J-V curves of the single Ag/PPV composite nanofiber under light illumination with different intensities.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211167&req=5

Figure 7: Photocurrent of the composite nanofiber. J-V curves of the single Ag/PPV composite nanofiber under light illumination with different intensities.
Mentions: The I-V characteristics of the device were measured under light illumination from a Xe lamp with different intensities at room temperature in the shielded box. Figure 7 shows that the photocurrent of the composite nanofiber obviously increases with increasing the light intensity from 0 to 5.76 mW/cm2. The I-V curves in Figure 7 show the non-ohmic character, which is consistent with the I-V curves of PPV and its composite film devices [17]. Under light illumination of 5.76 mW/cm2 and voltage of 20 V, the photocurrent is over three times larger than the dark current, which indicates that the composite nanofibers have high and sensitive opto-electronic response. The reason for the improvement (or enhancement) of the opto-electronic response of the composite nanofiber should be attributed to the following factor: there is the coordination effect to a certain extent between the Ag atom and the π system of PPV mentioned in "FTIR spectra."

Bottom Line: The novel Ag nanoparticles/poly(p-phenylene vinylene) [PPV] composite nanofibers were prepared by electrospinning.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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Faculty of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China. huangzh295@nenu.edu.cn.

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 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.

No MeSH data available.


Related in: MedlinePlus