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Materialization of single multicomposite nanowire: entrapment of ZnO nanoparticles in polyaniline nanowire.

Lee I, Park SY, Kim MJ, Yun M - Nanoscale Res Lett (2011)

Bottom Line: Entrapment of ZnO NPs was controlled via different conditions of SMNW fabrication such as an applied potential and mixture ratio of NPs and aniline solution.Furthermore, the electrical conductivity and elasticity of SMNWs show improvement over those of pure polyaniline nanowire.The new nano-multicomposite material showed synergistic effects on mechanical and electrical properties, with logarithmical change and saturation increasing ZnO NP concentration.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Electrical and Computer Engineering, University of Pittsburgh, Benedum Hall 348, Pittsburgh, PA 15261, USA. miy16@pitt.edu.

ABSTRACT
We present materialization of single multicomposite nanowire (SMNW)-entrapped ZnO nanoparticles (NPs) via an electrochemical growth method, which is a newly developed fabrication method to grow a single nanowire between a pair of pre-patterned electrodes. Entrapment of ZnO NPs was controlled via different conditions of SMNW fabrication such as an applied potential and mixture ratio of NPs and aniline solution. The controlled concentration of ZnO NP results in changes in the physical properties of the SMNWs, as shown in transmission electron microscopy images. Furthermore, the electrical conductivity and elasticity of SMNWs show improvement over those of pure polyaniline nanowire. The new nano-multicomposite material showed synergistic effects on mechanical and electrical properties, with logarithmical change and saturation increasing ZnO NP concentration.

No MeSH data available.


Related in: MedlinePlus

EDX data for single PANI nanowires and single ZnO NPs-entrapped PANI nanowires. (a) The SMNWs with ZnO NP show clear peaks at Zn and a higher peak at O resulting from the entrapment. The two different ZnO concentrations (black dashed line: 20 wt.%, red solid line: 5 wt.%) display different intensities of Zn. (b) Raman spectrum of fabricated single PANI nanowire.
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Figure 2: EDX data for single PANI nanowires and single ZnO NPs-entrapped PANI nanowires. (a) The SMNWs with ZnO NP show clear peaks at Zn and a higher peak at O resulting from the entrapment. The two different ZnO concentrations (black dashed line: 20 wt.%, red solid line: 5 wt.%) display different intensities of Zn. (b) Raman spectrum of fabricated single PANI nanowire.

Mentions: As the ZnO NP concentration increased, the NPs aggregated tightly in SMNW, and the structure of SMNW was affected. Thus, the ZnO NP concentration clearly affects the morphology of the SMNWs, as demonstrated in the SEM images. To further prove that the contrast spots are indeed ZnO and that our fabrication method works for nano-multicomposite material, we investigated the nanowires composition with energy-dispersive x-ray spectroscopy (EDX) and Raman spectroscopy as shown in Figure 2a, b. EDX data shows different peaks corresponding to the elements C, O, Si, and Zn. C, Si, and O are from the PANI and the SiO2 /Si substrate, respectively. The results are very distinct when compared to data for single-PANI nanowires. Clear peaks in the SMNWs for the element Zn as compared to this element in the single-PANI nanowires are visible. Other evidence for ZnO NP entrapment is the increased oxygen peaks in the SMNW as compared to images of the single PANI. The different ZnO NP concentration and specific distribution of ZnO NPs in the SMNWs might have resulted in different Zn and O intensities in the EDX scanning data.


Materialization of single multicomposite nanowire: entrapment of ZnO nanoparticles in polyaniline nanowire.

Lee I, Park SY, Kim MJ, Yun M - Nanoscale Res Lett (2011)

EDX data for single PANI nanowires and single ZnO NPs-entrapped PANI nanowires. (a) The SMNWs with ZnO NP show clear peaks at Zn and a higher peak at O resulting from the entrapment. The two different ZnO concentrations (black dashed line: 20 wt.%, red solid line: 5 wt.%) display different intensities of Zn. (b) Raman spectrum of fabricated single PANI nanowire.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211487&req=5

Figure 2: EDX data for single PANI nanowires and single ZnO NPs-entrapped PANI nanowires. (a) The SMNWs with ZnO NP show clear peaks at Zn and a higher peak at O resulting from the entrapment. The two different ZnO concentrations (black dashed line: 20 wt.%, red solid line: 5 wt.%) display different intensities of Zn. (b) Raman spectrum of fabricated single PANI nanowire.
Mentions: As the ZnO NP concentration increased, the NPs aggregated tightly in SMNW, and the structure of SMNW was affected. Thus, the ZnO NP concentration clearly affects the morphology of the SMNWs, as demonstrated in the SEM images. To further prove that the contrast spots are indeed ZnO and that our fabrication method works for nano-multicomposite material, we investigated the nanowires composition with energy-dispersive x-ray spectroscopy (EDX) and Raman spectroscopy as shown in Figure 2a, b. EDX data shows different peaks corresponding to the elements C, O, Si, and Zn. C, Si, and O are from the PANI and the SiO2 /Si substrate, respectively. The results are very distinct when compared to data for single-PANI nanowires. Clear peaks in the SMNWs for the element Zn as compared to this element in the single-PANI nanowires are visible. Other evidence for ZnO NP entrapment is the increased oxygen peaks in the SMNW as compared to images of the single PANI. The different ZnO NP concentration and specific distribution of ZnO NPs in the SMNWs might have resulted in different Zn and O intensities in the EDX scanning data.

Bottom Line: Entrapment of ZnO NPs was controlled via different conditions of SMNW fabrication such as an applied potential and mixture ratio of NPs and aniline solution.Furthermore, the electrical conductivity and elasticity of SMNWs show improvement over those of pure polyaniline nanowire.The new nano-multicomposite material showed synergistic effects on mechanical and electrical properties, with logarithmical change and saturation increasing ZnO NP concentration.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Electrical and Computer Engineering, University of Pittsburgh, Benedum Hall 348, Pittsburgh, PA 15261, USA. miy16@pitt.edu.

ABSTRACT
We present materialization of single multicomposite nanowire (SMNW)-entrapped ZnO nanoparticles (NPs) via an electrochemical growth method, which is a newly developed fabrication method to grow a single nanowire between a pair of pre-patterned electrodes. Entrapment of ZnO NPs was controlled via different conditions of SMNW fabrication such as an applied potential and mixture ratio of NPs and aniline solution. The controlled concentration of ZnO NP results in changes in the physical properties of the SMNWs, as shown in transmission electron microscopy images. Furthermore, the electrical conductivity and elasticity of SMNWs show improvement over those of pure polyaniline nanowire. The new nano-multicomposite material showed synergistic effects on mechanical and electrical properties, with logarithmical change and saturation increasing ZnO NP concentration.

No MeSH data available.


Related in: MedlinePlus