Zobrazeno 1 - 10
of 77
pro vyhledávání: '"C.O. Yoon"'
Publikováno v:
Synthetic Metals. 117:53-59
A generic non-linear circuit model based on transmission lines with elements representing kinetic steps in the electrochemical process of electrical storage system is established. Non-linear characteristics of parameters can be determined by measurem
Publikováno v:
Journal of Power Sources. 83:61-70
A method of numerical representation for electrical storage cells based on measurement of wide frequency range impedance spectra at a number of different states of charge and measurement of the depth-of-discharge dependence of equilibrium voltage are
Publikováno v:
Synthetic Metals. 99:201-212
High-quality polypyrrole-hexafluorophosphate (PPy-PF6) films with high density (∼1.4 g/cm3), high conductivity (>300 S/cm for unstretched film) and high electrochemical stability are obtained reproducibly by galvanostatic polymerization at low-temp
Autor:
Andrei N. Aleshin, Jong Hyun Kim, Kwanghee Lee, Hosull Lee, Eward K. Miller, Alan J. Heeger, C.O. Yoon, Reghu Menon
Publikováno v:
Advanced Materials. 10:456-459
O WILEY-VCH Verlag GmbH, D-69469 Weinheim, 1998 0935-9648/98/0604-0456 $ 17.50+.50/0 Adv. Mater. 1998, 10, No. 6[14] a) M. Binggeli, C. M. Mate, Appl. Phys. Lett. 1994, 65, 415. b) D.A.Grigg, P.E. Russell, J.E. Griffith, J. Vac. Sci. Technol. A 1992,
Publikováno v:
Synthetic Metals. 81:75-80
Electrical transport properties of polyaniline prepared by chemical oxidative polymerization in the presence of phosphoric acid were investigated by low temperature conductivity and thermoelectric power measurements. As the ratio of acid to aniline i
Autor:
M. Reghu, Alan J. Heeger, C.O. Yoon, Daniel Moses, Tian-An Chen, Yong Cao, X. Wu, Reuben D. Rieke
Publikováno v:
Synthetic Metals. 75:229-239
Transport data for polypyrrole-hexafluorophosphate (PPy-PF6), protonated polyaniline and iodine-doped regio-regular polyalkylthiophenes (PATs), all in the insulating regime near the disorder-induced metal-insulator (M-I) boundary, are presented and a
Publikováno v:
Physical Review B. 52:4779-4787
By controlling the extent of disorder through electrochemical synthesis at reduced temperatures, conducting polypyrrole (PPy) can be obtained in the metallic regime, in the insulating regime, and in the critical regime of the disorder-induced metal-i
Publikováno v:
Synthetic Metals. 69:255-258
We investigated the transport properties of solution-processed conductive polymer blends of polyaniline-(camhpor sulfonic acid), PANI-CSA, with insulating polymethylmethacrylate (PMMA), as a function of various volume fraction (ƒ) of PANI-CSA. Due t
Publikováno v:
Synthetic Metals. 69:329-332
In the critical regime of the disorder-induced metal-insulator (M-I) transition, the temperature dependence of conductivity follows a power law, σ ( T ) ∝ T β , and the reduced activation energy function, W = T { Δ (ln ϱ )/ ΔT }, is temperatur
Publikováno v:
Synthetic Metals. 64:53-57
The temperature coefficient of the resistivity (TCR) of doped polypyrrole changes sign below 25 K, from negative to positive, in samples with relatively weak disorder (as inferred from the resistivity ratio, ϱ r = ϱ (1.4 K)/ ϱ (300 K)). We have st