Limits...
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

Fabricated SMNWs with different ZnO NPs concentrations. (a) Low-resolution SEM image of 5-μ m-long SMNW, entrapped ZnO NPs with uniform structure. (b) Highly magnified image of 5 wt.% ZnO NP-entrapped PANI nanowire with 97 nm height and 133 nm width. Diameters of the observed particles are 33.90 and 35.39 nm. (c) 10 wt.% ZnO NP-entrapped PANI nanowire with 108 nm height and 110 nm width. Diameters of the observed particles are 54.87 and 59.42 nm. (d) 20 wt.% ZnO NP-entrapped PANI nanowire with 98 nm height and 80 to 110 nm width. It can be seen that the agglomerated particles greatly changes surface morphology of the SMNW with taped shape.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211487&req=5

Figure 1: Fabricated SMNWs with different ZnO NPs concentrations. (a) Low-resolution SEM image of 5-μ m-long SMNW, entrapped ZnO NPs with uniform structure. (b) Highly magnified image of 5 wt.% ZnO NP-entrapped PANI nanowire with 97 nm height and 133 nm width. Diameters of the observed particles are 33.90 and 35.39 nm. (c) 10 wt.% ZnO NP-entrapped PANI nanowire with 108 nm height and 110 nm width. Diameters of the observed particles are 54.87 and 59.42 nm. (d) 20 wt.% ZnO NP-entrapped PANI nanowire with 98 nm height and 80 to 110 nm width. It can be seen that the agglomerated particles greatly changes surface morphology of the SMNW with taped shape.

Mentions: Figure 1 shows SMNWs grown along a 5-μ m-long nanochannel. These SMNWs have a very uniform width of 108 to 133 nm and a height of 97 to 112 nm, measured using both scanning electron microscopy (SEM) and atomic force microscope (AFM). Figure 1a shows the uniform structure of the SMNW is comparable to that of the single PANI nanowire as demonstrated in our previous research [20]. Highly magnified images of the SMNWs for 5, 10, and 20 wt.% of ZnO NP concentrations are shown in Figure 1b, c, d, respectively. In these SEM images, some observed contrast spots on the SMNWs are assumed to be ZnO NPs with a diameter of 30 to 60 nm. This range is consistent with the 20 to 70 nm range listed in the datasheet from Alfa Aesar. The 5 wt.% ZnO NPs SMNW shows a uniform 133 nm width and smooth topography in Figure 1b. The observed particles were 33.90 and 35.39 nm in diameter, respectively (measured with an SEM). The 10 wt.% ZnO NP-entrapped PANI nanowire displays a regular 117 nm width and a greater number of ZnO NPs than the 5 wt.% ZnO NP concentration, as might be expected in Figure 1c. The 20 wt.% ZnO NP-entrapped PANI nanowire displays widths varying from 60 to 100 nm in Figure 1d. Increases in the density of the NPs and change of surface morphology of the SMNWs are clear when comparing Figure 1b, c. In the insets of Figure 1b, c, d, the AFM line scans show height variation from 97 to 112 nm along the nanowire.


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

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

Fabricated SMNWs with different ZnO NPs concentrations. (a) Low-resolution SEM image of 5-μ m-long SMNW, entrapped ZnO NPs with uniform structure. (b) Highly magnified image of 5 wt.% ZnO NP-entrapped PANI nanowire with 97 nm height and 133 nm width. Diameters of the observed particles are 33.90 and 35.39 nm. (c) 10 wt.% ZnO NP-entrapped PANI nanowire with 108 nm height and 110 nm width. Diameters of the observed particles are 54.87 and 59.42 nm. (d) 20 wt.% ZnO NP-entrapped PANI nanowire with 98 nm height and 80 to 110 nm width. It can be seen that the agglomerated particles greatly changes surface morphology of the SMNW with taped shape.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 1: Fabricated SMNWs with different ZnO NPs concentrations. (a) Low-resolution SEM image of 5-μ m-long SMNW, entrapped ZnO NPs with uniform structure. (b) Highly magnified image of 5 wt.% ZnO NP-entrapped PANI nanowire with 97 nm height and 133 nm width. Diameters of the observed particles are 33.90 and 35.39 nm. (c) 10 wt.% ZnO NP-entrapped PANI nanowire with 108 nm height and 110 nm width. Diameters of the observed particles are 54.87 and 59.42 nm. (d) 20 wt.% ZnO NP-entrapped PANI nanowire with 98 nm height and 80 to 110 nm width. It can be seen that the agglomerated particles greatly changes surface morphology of the SMNW with taped shape.
Mentions: Figure 1 shows SMNWs grown along a 5-μ m-long nanochannel. These SMNWs have a very uniform width of 108 to 133 nm and a height of 97 to 112 nm, measured using both scanning electron microscopy (SEM) and atomic force microscope (AFM). Figure 1a shows the uniform structure of the SMNW is comparable to that of the single PANI nanowire as demonstrated in our previous research [20]. Highly magnified images of the SMNWs for 5, 10, and 20 wt.% of ZnO NP concentrations are shown in Figure 1b, c, d, respectively. In these SEM images, some observed contrast spots on the SMNWs are assumed to be ZnO NPs with a diameter of 30 to 60 nm. This range is consistent with the 20 to 70 nm range listed in the datasheet from Alfa Aesar. The 5 wt.% ZnO NPs SMNW shows a uniform 133 nm width and smooth topography in Figure 1b. The observed particles were 33.90 and 35.39 nm in diameter, respectively (measured with an SEM). The 10 wt.% ZnO NP-entrapped PANI nanowire displays a regular 117 nm width and a greater number of ZnO NPs than the 5 wt.% ZnO NP concentration, as might be expected in Figure 1c. The 20 wt.% ZnO NP-entrapped PANI nanowire displays widths varying from 60 to 100 nm in Figure 1d. Increases in the density of the NPs and change of surface morphology of the SMNWs are clear when comparing Figure 1b, c. In the insets of Figure 1b, c, d, the AFM line scans show height variation from 97 to 112 nm along the nanowire.

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