Journal ArticleDOI
Anomalous thermal conductivity of polyacetylene
TLDR
In this paper, the specific heat and thermal conductivity of polyacetylene from liquid helium to room temperature were measured and it was shown that the polymer chains are oriented parallel to the well-known fibers in polyethylene.Abstract:
Measurements of the specific heat and of the thermal conductivity of pure and iodine doped polyacetylene from liquid helium to room temperature are reported. The thermal conductivity rises linearly from 3 to 50 K and with about the third power of the temperature from 50 to 300 K. The kink at 50 K corresponds to a very unusual minimum of the phonon mean free path, probably caused by resonant scattering of fast thermal phonons (which travel along the chains) on low frequency interchain modes. These results suggest that the polymer chains are oriented parallel to the well-known fibers in polyacetylene.read more
Citations
More filters
Journal ArticleDOI
Simultaneous Increase in Seebeck Coefficient and Conductivity in a Doped Poly(alkylthiophene) Blend with Defined Density of States
TL;DR: In this paper, the authors propose polymer blends in which ground state hole carriers, created by doping a minor additive component, are mainly at an orbital energy set below the hole energy of the major component of the blend, leading to a regime in which hole conductivity and Seebeck coefficient may be increased in parallel.
Journal ArticleDOI
Thermal Transport in Conductive Polymer–Based Materials
Xiangfan Xu,Jun Zhou,Jie Chen +2 more
Journal ArticleDOI
Exploring the Extremes of Heat Conduction in Anisotropic Materials
TL;DR: In this article, the authors discuss the recent advances in understanding of thermal phonon transport in anisotropic solids obtained using new theoretical, computational, and experimental tools, and discuss the application of these tools in thermal management and thermal insulation.
Journal ArticleDOI
Iodine doping effects on the lattice thermal conductivity of oxidized polyacetylene nanofibers
Kedong Bi,Kedong Bi,Annie Weathers,Satoshi Matsushita,Michael T. Pettes,Munju Goh,Munju Goh,Kazuo Akagi,Li Shi +8 more
TL;DR: In this paper, the thermal transport in oxidized polyacetylene (PA) nanofibers with diameters in the range between 74 and 126 nm was measured with the use of a suspended micro heater device.
Journal ArticleDOI
Improved thermoelectric performance of PEDOT:PSS film treated with camphorsulfonic acid
TL;DR: In this paper, a post-treatment method was proposed to enhance the thermal properties of PEDOT:PSS thin films, and the maximum value of ZT was achieved by 0.017 at room temperature for the poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) film post-treated with 0.08 M CSA solution.
References
More filters
Journal ArticleDOI
Electrical Conductivity in Doped Polyacetylene.
C. K. Chiang,C. R. Fincher,Yung Woo Park,Alan J. Heeger,H. Shirakawa,E. J. Louis,S. C. Gau,Alan G. MacDiarmid +7 more
TL;DR: In this paper, a metal-to-insulator transition at dopant concentrations near 1% was shown for polyacetylene, a new class of conducting polymers in which the electrical conductivity can be systematically and continuously varied over a range of eleven orders of magnitude.
Journal ArticleDOI
Simultaneous polymerization and formation of polyacetylene film on the surface of concentrated soluble Ziegler-type catalyst solution
TL;DR: In this article, a direct method of simultaneously polymerizing and forming acetylene monomer to produce uniformly thin films of polyacetylene was investigated in terms of catalyst system, catalyst concentration, and polymerization temperature.
Journal ArticleDOI
Conducting Polymers: Halogen Doped Polyacetylene.
TL;DR: In this article, the electrical conductivity of the halogen doped transpolyacetylene system, (CH)x, was studied in terms of a model of the doping process based on charge transfer.
Journal ArticleDOI
Specific heats of pure and doped polyacetylene
TL;DR: In this article, the temperature dependences of pure polyacetylene (both cis and trans isomers) and heavily doped metallic [CH(AsF5)0.12]X are reported.
Journal ArticleDOI
Absence of Knight-shift in the metallic state of polyacetylene
TL;DR: The absence of the Knight-shift below the critical concentration of 7 % is in good agreement with the previously reported lack of Pauli-paramagnetism and hence confirms the existence of a novel mechanism of electrical conductivity with spinless charge carriers in the doping range from 1 to 7 % as discussed by the authors.