Pressure effects on the resistivity of pristine and doped polyacetylene

Ferraris, John P.; Webb, A. W.; Weber, David C.; Fox, W. B.; Carpenter, E. R.; Brant, Patrick

doi:10.1016/0038-1098(80)90760-7

Cited by 67 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 we recall that ␣R 0 is of the order of unity, while T = 0.08 GPa −1 . 18 Note that the compressibility term results in a correction less than 10% to the direct evaluation of act from the slope of the ln f max ͑P͒ data. The use of Eq.…”

Section: ͑2͒mentioning

confidence: 99%

Separation of electric charge flow mechanisms in conducting polymer networks under hydrostatic pressure

Papathanassiou

Sakellis

Grammatikakis

2006

Applied Physics Letters

View full text Add to dashboard Cite

To distinguish between different electric charge flow mechanisms in conducting polymer networks, the authors performed ac conductivity and complex permittivity measurements in conducting polypyrrole at various hydrostatic pressure values. Pressure influences capacitive coupling of chains or conducting grains. The measurement of ac conductivity and complex permittivity in the frequency domain at different hydrostatic pressures seems to be a tool for resolving different conductivity modes in conjugated polymer networks and understanding electric signal propagation in random networks.

show abstract

Section: ͑2͒mentioning

confidence: 99%

Separation of electric charge flow mechanisms in conducting polymer networks under hydrostatic pressure

Papathanassiou

Sakellis

Grammatikakis

2006

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…This trend existed whether or not we plotted the weighted average peak position or the individual peak positions of the fit Gaussians. Ferraris et al [24] noted that their compressibility data showed an irregularity around 20 kbar and suggested that PA transformed into a less compressible form. Ma et al [33] suggested that at external pressures around 6 kbar trans-PA reached the maximum close-packed structure and underwent a change in compressibility.…”

Section: Discussionmentioning

confidence: 99%

“…There have been a number of high-pressure studies on PA. Ferraris et al [24] carried out room-temperature compressibility and resistivity measurements for pristine and iodide-doped PA.…”

Section: Methodsmentioning

confidence: 99%

“…[33] Additionally, Ferraris et al measured the change in the height of a cis-PA-rich sample for external pressures up to 25 kbar. [24] Since the two datasets are similar for the trans and cis-isomers, we utilized both sets of data to calculate the V(P)/V(0) ratio versus pressure and fit both datasets to the Murnaghan equation given in Eqn (3) using B 0 and B 0 as adjustable parameters. This yielded values of B 0 = 68 kbar and B 0 = 1.0 (Fig.…”

Section: Grüneisen Analysis Of the Pressure-induced Raman Band Shiftsmentioning

confidence: 99%

“…Table 1 summarizes all the fitting parameters [ν(0) and γ or m] for the vibrational modes analyzed. Figure 6 shows the pressure-induced Raman shifts for the ν 3 [24] (circles) and trans-PA [33] (triangles) to the Murnaghan equation (Eqn (3)) using B 0 and B 0 as adjustable parameters. Both sets of isomer data were used to determine the best fitting parameters of B 0 = 68 and B 0 = 1.0 (solid line).…”

Section: Grüneisen Analysis Of the Pressure-induced Raman Band Shiftsmentioning

confidence: 99%

See 2 more Smart Citations

High‐pressure Raman spectroscopy of nanoparticle polyacetylene in a poly(vinyl‐butyral) matrix

McIntire

Zhao²,

Kobryanskii

et al. 2011

J Raman Spectroscopy

View full text Add to dashboard Cite

The pressure-induced Raman shifts of six vibrational bands of 20% and 50% trans-polyacetylene nanoparticles in poly(vinylbutyral) matrix films (NPA/PVB) were studied from 0 to 45 kbar using a diamond anvil cell (DAC). The Raman shifts did not depend on the thickness of the two samples studied. Two of the vibrational bands displayed peak positions that depended on the isomeric compositions, with the 20% trans-NPA/PVB bands being slightly blue-shifted relative to the 50% trans-NPA/PVB bands over the 45 kbar pressure range. The Raman bands of NPA/PVB associated with the trans form initially exhibited a relatively large shift at low pressures (P < 10 kbar) along with a drastic change in their band profile. In order to investigate the relative shielding of the vibrational modes studied, a Grüneisen analysis of the pressure-induced shifts was conducted by estimating the parameters of the Murnaghan equation of state for solid polyacetylene (PA). Four of the six vibrational modes were found to be sensitive to compression of the interchain void space, while the other two modes were insensitive, indicating that they are relatively shielded from the compression of the sample.

show abstract

Polymers as Electronic Materials — Today’s Possibilities and Tomorrow’s Dreams

Baughman

1984

Contemporary Topics in Polymer Science

View full text Add to dashboard Cite

Pressure effects on the resistivity of pristine and doped polyacetylene

Cited by 67 publications

References 10 publications

Separation of electric charge flow mechanisms in conducting polymer networks under hydrostatic pressure

Separation of electric charge flow mechanisms in conducting polymer networks under hydrostatic pressure

High‐pressure Raman spectroscopy of nanoparticle polyacetylene in a poly(vinyl‐butyral) matrix

Polymers as Electronic Materials — Today’s Possibilities and Tomorrow’s Dreams

Contact Info

Product

Resources

About