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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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FT-IR spectra. a Pure PPV fibers, b composite fibers.
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Figure 4: FT-IR spectra. a Pure PPV fibers, b composite fibers.

Mentions: From the FTIR spectra of pristine PPV fibers and composite fibers (Figure 4), we can conclude that both pristine PPV fibers and composite fibers have the three similar characteristic absorption peaks at 1,646 cm-1 (C = C bond stretching mode), 1,515 cm-1 (C-C ring stretching mode), and 962 cm-1 (trans-vinylene C-H out-of-plane bending mode), which implies that the conjugation structure of PPV is basically kept in composite fibers. However, the characteristic absorption peak of the pristine PPV fibers at 831 cm-1 (p-phenylene C-H out-of-plane bending mode) was obviously broadened in the spectrum of composite fibers. This phenomenon could be explained by the coordination effect to a certain extent between the 5S orbital of the Ag atom, locating over the conjugation plane of PPV, and the π system of PPV (especially the π system of the benzene ring part). Therefore, the SP3 hybrid orbital component could be partly introduced into the C-H bond (SP2 hybrid orbital) of the benzene ring. The occurrence of the coordination effect should be significantly favorable for the charge separation of photoexcitons and the charge transfer at the interface between Ag nanoparticles and PPV so as to obviously improve the opto-electronic response of the composite materials.


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)

FT-IR spectra. a Pure PPV fibers, b composite fibers.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 4: FT-IR spectra. a Pure PPV fibers, b composite fibers.
Mentions: From the FTIR spectra of pristine PPV fibers and composite fibers (Figure 4), we can conclude that both pristine PPV fibers and composite fibers have the three similar characteristic absorption peaks at 1,646 cm-1 (C = C bond stretching mode), 1,515 cm-1 (C-C ring stretching mode), and 962 cm-1 (trans-vinylene C-H out-of-plane bending mode), which implies that the conjugation structure of PPV is basically kept in composite fibers. However, the characteristic absorption peak of the pristine PPV fibers at 831 cm-1 (p-phenylene C-H out-of-plane bending mode) was obviously broadened in the spectrum of composite fibers. This phenomenon could be explained by the coordination effect to a certain extent between the 5S orbital of the Ag atom, locating over the conjugation plane of PPV, and the π system of PPV (especially the π system of the benzene ring part). Therefore, the SP3 hybrid orbital component could be partly introduced into the C-H bond (SP2 hybrid orbital) of the benzene ring. The occurrence of the coordination effect should be significantly favorable for the charge separation of photoexcitons and the charge transfer at the interface between Ag nanoparticles and PPV so as to obviously improve the opto-electronic response of the composite materials.

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