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Two experiments in physics based on electrospun polymer nanofibers
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10.1119/1.2983147
/content/aapt/journal/ajp/76/12/10.1119/1.2983147
http://aip.metastore.ingenta.com/content/aapt/journal/ajp/76/12/10.1119/1.2983147
View: Figures

Figures

Image of Fig. 1.
Fig. 1.

(a) Basic elements of the electrospinning apparatus. (b) SEM image of polystyrene nanofibers, electrospun from a solution of tetrahydrofuran. The scale bar at the bottom of (b) corresponds to a length of . The average fiber diameter was .

Image of Fig. 2.
Fig. 2.

(a) AFM image of an isolated polyaniline nanofiber bridging two gold electrodes. The inset shows a schematic of the fiber contacting two electrodes and the circuit used to experimentally determine the fiber conductivity. (b) Height profile along the dark line seen in (a). The average fiber diameter was .

Image of Fig. 3.
Fig. 3.

Current-voltage characteritics of the polyaniline nanofiber shown in Fig. 2. The measurements were carried out in vacuum at .

Image of Fig. 4.
Fig. 4.

Normalized resistance of individual electrospun HCSA-doped polyaniline nanofibers (a) and cast film of the same polymer (b) to vapors of methanol and . The response of the nanofibers is larger and slightly faster than the cast film due to the larger surface-to-volume ratio of the fiber over the film. The arrows indicate the moment when the specified gas was introduced into the chamber.

Image of Fig. 5.
Fig. 5.

(a) Schematic of the Schottky nanodiode with the external electrical connections. (b) SEM image of the fiber at the wafer edge. The scale bar at the bottom of (b) corresponds to a length of . The fiber is flexible and does not fracture as it bends over the wafer edge. The average fiber diameter was .

Image of Fig. 6.
Fig. 6.

Current-voltage characteristics at of the Schottky diode shown in Fig. 5. The inset shows a semilog plot of the forward bias current as a function of forward bias voltage used for extracting device parameters. is the saturation current.

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/content/aapt/journal/ajp/76/12/10.1119/1.2983147
2008-12-01
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Two experiments in physics based on electrospun polymer nanofibers
http://aip.metastore.ingenta.com/content/aapt/journal/ajp/76/12/10.1119/1.2983147
10.1119/1.2983147
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