A hexagonal structure for alkali-metal doped poly (p-phenylene)

Murthy, N. Sanjeeva; Baughman, Ray H.; Shacklette, L. W.; Fark, H.; Fink, J.

doi:10.1016/0038-1098(91)90846-n

Cited by 23 publications

(6 citation statements)

References 20 publications

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“…When the p-doped polymer is reduced, the 'undoped' state is formed. Usually, this state is insulating or semi-insulating, depending on the degree of completion of the undoping process [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of the PAni morphology deposited on the carbon fiber: An analysis of the capacitive behavior of this hybrid composite

Fonseca

Almeida

Baldan

et al. 2011

Chemical Physics Letters

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a b s t r a c t CF/PAni composites were synthesized using the polymerization chemistry. Three different deposition times were used in the synthesis, such as: 30, 60 and 90 min. The morphology and the structure of composites were analyzed by SEM and Raman spectroscopy, respectively. The influence of the mass of polymer deposited on the carbon fiber, with respect to the values of specific capacitance (C sp ) was analyzed by electrochemical experiments. The optimum value of the C sp was obtained for CF/PAni-30 min (C sp = 188 Fg À1 ). This fact is related to the lower charge transfer resistance, due to its more homogeneous morphology and thin layer polyaniline.

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Section: Introductionmentioning

confidence: 99%

Influence of the PAni morphology deposited on the carbon fiber: An analysis of the capacitive behavior of this hybrid composite

Fonseca

Almeida

Baldan

et al. 2011

Chemical Physics Letters

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“…We used as carbon nanotube, a MWNTs with 90% purity.The MWNTs were functionalized with H 2 SO 4 and HNO 3 HCl. All samples were dry in air atmosphere until a constant mass.…”

Section: Methodsmentioning

confidence: 99%

“…Usually, this state is insulating or semi-insulating, depending on the degree of completion of the undoping process. (1)(2)(3)(4)(5).…”

Section: Introductionmentioning

confidence: 99%

CF/PAni/MWNT Composites Material, A Novel Electrode to Supercapacitor

Almeida¹,

Fonseca²,

Baldan³

et al. 2012

ECS Trans.

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In this work, the binary and ternary composites composed respectively by carbon fiber/polyaniline(CF/PAni) and carbon fiber/multiwall carbon nanotubes/polyaniline (CF/PAni/MWCNT) were synthesized by oxidative polymerization. The composite materials were physically characterized by Scanning electron microscopy, by Raman spectroscopy and electrochemically by cyclic voltammetry. These hybrid composites were designed to be used as supercapacitors. By Raman spectroscopy, a higher conductivity for the CF/PAni/MWCNT composite was observed composite was observed .The highest specific capacitance was achieved to CF/PAni/MWCNT (400Fg-1) which is a good candidate to the supercapacitor electrode.

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“…A similar configuration has been detected experimentally for PPP and PPV films doped with Na, which stabilize in the hexagonal phase. 32,33 For comparison, we have also simulated deposition of Na on the ͑001͒ PPV surface, and our results are shown grouped together in Fig. 3 for the initial steps of deposition.…”

Section: A Al/ppv Interfacesmentioning

confidence: 99%

Atomistic molecular dynamics study of interface formation: Al on poly(p-phenylene vinylene)

Giro

Caldas

2008

Phys. Rev. B

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We model interface formation by metal deposition on the conjugated polymer poly-para-phenylene vinylene, studying direct aluminum and layered aluminum-calcium structures Al/PPV and Al/Ca/PPV. To do that we use classical molecular dynamics simulations, checked by ab initio density-functional theory calculations, for selected relevant configurations. We find that Al not only migrates easily into the film, with a strong charge transfer to the neighboring chains, but also promotes rearrangement of the polymer in the interfacial region to the hexagonal structure. On the other hand, our results indicate that a thin Ca layer is sufficient to protect the film and maintain a well-defined metal/polymer interface, and that also a thin Al capping layer may protect the whole from environmental degradation.

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A hexagonal structure for alkali-metal doped poly (p-phenylene)

Cited by 23 publications

References 20 publications

Influence of the PAni morphology deposited on the carbon fiber: An analysis of the capacitive behavior of this hybrid composite

Influence of the PAni morphology deposited on the carbon fiber: An analysis of the capacitive behavior of this hybrid composite

CF/PAni/MWNT Composites Material, A Novel Electrode to Supercapacitor

Atomistic molecular dynamics study of interface formation: Al on poly(p-phenylene vinylene)

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