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Nanojunctions in conducting polypyrrole single nanowire made by focused electron beam: Charge transport characteristics
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10.1063/1.3609068
/content/aip/journal/jap/110/2/10.1063/1.3609068
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/2/10.1063/1.3609068

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) I-V characteristic curves of pristine and focused E-beam treated PPy single NW with doses of 5.0 × 1017 and 7.5 × 1017 electrons/cm2 at RT. Top inset: SEM image of pristine PPy single NW. (b) I-V characteristic curves of pristine and focused E-beam treated PPy single NWs with single, double, and triple nanojunctions at RT. Bottom insets of (a) and (b): Schematic illustrations of the PPy single NW with single and triple nanojunctions, respectively.

Image of FIG. 2.
FIG. 2.

(Color online) Normalized micro-Raman spectra of pristine and focused E-beam treated PPy single NW with various doses (1.0 × 1016, 5.0 × 1016, 1.0 × 1017, 5.0 × 1017, 1.0 × 1018, and 5.0 × 1018 electrons/cm2) (a) in the range of 950 ∼ 1150 cm−1 for doping induced Raman modes and (b) in the range of 1100 ∼ 1850 cm−1 for conformational Raman modes.

Image of FIG. 3.
FIG. 3.

(Color online) Decomposed Raman sub-peaks based on Lorentzian fitting curves corresponding to symmetric C=C stretching mode of PPy single NW treated with the focused E-beam at various doses. (a) benzoid peak; (b) quinoid peak.

Image of FIG. 4.
FIG. 4.

(Color online) Temperature-dependent I-V characteristic curves of pristine and focused E-beam treated PPy single NWs below 50 K. (a) Pristine NW; (b) and (c) focused E-beam treated NW (single nanojunction) with doses of 5.0 × 1017 and 7.5 × 1017 electrons/cm2, respectively. Insets: dI/dV vs applied bias for conductance gap.

Image of FIG. 5.
FIG. 5.

(Color online) Temperature-dependent I-V characteristic curves of PPy single NW in the range RT ∼ 100 K. (a) Pristine NW; and focused E-beam treated NW with doses of (b) 5.0 × 1017 and (c) 7.5 × 1017 electrons/cm2. Insets: dI/dV vs V for the corresponding NWs.

Image of FIG. 6.
FIG. 6.

(Color online) Temperature-dependent DC resistivity [ρ DC(T)] of pristine and focused E-beam treated PPy single NWs. (a) Pristine NW; (b) and (c) E-beam treated NW (single nanojunction) with doses of 5.0 × 1017 and 7.5 × 1017 electrons/cm2, respectively.

Tables

Generic image for table
Table I.

Assignments of micro-Raman characteristic peaks of pristine PPy single NW.

Generic image for table
Table II.

Fitting parameters of T 3D, T 1, T 0, and T C for pristine and focused E-beam treated PPy single NWs with dose of 5.0 × 1017 and 7.5 × 1017 electrons/cm2, based on 3-D VRH and FIT models.

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/content/aip/journal/jap/110/2/10.1063/1.3609068
2011-07-27
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanojunctions in conducting polypyrrole single nanowire made by focused electron beam: Charge transport characteristics
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/2/10.1063/1.3609068
10.1063/1.3609068
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