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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

Enhancement of physical properties of the SMNWs. Electrical conductivity (solid line at 300 K) and elasticity (dash and double dot line) are measured for 0, 1, 2.5, 5, 10, and 20 wt.%. Note the dramatic increase in each from 2.5 to 10 wt.% ZnO NP concentration. The slopes of physical properties decrease after 10 wt.%, resulting from ZnO NP saturation.
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Figure 4: Enhancement of physical properties of the SMNWs. Electrical conductivity (solid line at 300 K) and elasticity (dash and double dot line) are measured for 0, 1, 2.5, 5, 10, and 20 wt.%. Note the dramatic increase in each from 2.5 to 10 wt.% ZnO NP concentration. The slopes of physical properties decrease after 10 wt.%, resulting from ZnO NP saturation.

Mentions: Post-fabrication, the electrical and mechanical properties of SMNWs fabricated in the same growing condition (600 nA current) were characterized. First, the I-V measurements of SMNWs with various concentrations were taken and compared with the measurements of single-PANI nanowires. Figure 4 displays the results when plotting electrical conductivities as a function of the ZnO NP concentration. Electrical conductivities at 300 K were calculated from the I-V curves and the dimensions of the nanowire (from SEM and AFM measurements). The SMNW clearly shows increased electrical conductivity compared with the single-PANI nanowire. The single-PANI nanowire electrical conductivity is 3.30 ± 0.03 × 102 S cm-1. The ZnO NPs-entrapped PANI nanowires' conductivity (300 K), on the other hand, varied from 3.58 ± 0.03 × 102 to 1.05 ± 0.21 × 102 S cm-1 in Figure 4. Electrical conductivity demonstrated increases linearly as the ZnO NP concentration increased. In contrast, the increase of electrical conductivity slowed down in the range of concentrations higher than 10 wt.%, with the data trend showing logarithmically increasing behavior.


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

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

Enhancement of physical properties of the SMNWs. Electrical conductivity (solid line at 300 K) and elasticity (dash and double dot line) are measured for 0, 1, 2.5, 5, 10, and 20 wt.%. Note the dramatic increase in each from 2.5 to 10 wt.% ZnO NP concentration. The slopes of physical properties decrease after 10 wt.%, resulting from ZnO NP saturation.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 4: Enhancement of physical properties of the SMNWs. Electrical conductivity (solid line at 300 K) and elasticity (dash and double dot line) are measured for 0, 1, 2.5, 5, 10, and 20 wt.%. Note the dramatic increase in each from 2.5 to 10 wt.% ZnO NP concentration. The slopes of physical properties decrease after 10 wt.%, resulting from ZnO NP saturation.
Mentions: Post-fabrication, the electrical and mechanical properties of SMNWs fabricated in the same growing condition (600 nA current) were characterized. First, the I-V measurements of SMNWs with various concentrations were taken and compared with the measurements of single-PANI nanowires. Figure 4 displays the results when plotting electrical conductivities as a function of the ZnO NP concentration. Electrical conductivities at 300 K were calculated from the I-V curves and the dimensions of the nanowire (from SEM and AFM measurements). The SMNW clearly shows increased electrical conductivity compared with the single-PANI nanowire. The single-PANI nanowire electrical conductivity is 3.30 ± 0.03 × 102 S cm-1. The ZnO NPs-entrapped PANI nanowires' conductivity (300 K), on the other hand, varied from 3.58 ± 0.03 × 102 to 1.05 ± 0.21 × 102 S cm-1 in Figure 4. Electrical conductivity demonstrated increases linearly as the ZnO NP concentration increased. In contrast, the increase of electrical conductivity slowed down in the range of concentrations higher than 10 wt.%, with the data trend showing logarithmically increasing behavior.

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