Conducting Organic Composites

Farges, J.; Brau, A.

doi:10.1016/b978-012513745-4/50035-4

Cited by 8 publications

(6 citation statements)

References 67 publications

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“…The size without limit and any form of the composite samples are their main advantages over the singlecrystal technology. The physical properties of such composites roughly resemble the properties of their crystalline analogues obtained by the traditional ways [5][6][7]; their isotropic properties are the only exception. However, the grains forming the composite sample are anisotropic and show all the properties typical of single crystals.…”

Section: Organic Charge-transfer Complexes: Single Crystals and Compo...mentioning

confidence: 71%

“…During this process, not only the number of instantaneous contact points increases, but also these point contact interfaces change randomly. This is why the kinetics of the reaction, and thus, its efficiency, are significantly dependent on grinding conditions [5]. When two polycrystalline reactants are ground together, two effects are in fact competing: together with the expected CT reaction effect, there is also a charge localisation side effect.…”

Section: Principles and Remarks On The Composite Technologymentioning

confidence: 99%

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Multiphase structure and physical properties of organic composites obtained by mechanochemical reaction between BEDT–TTF and iodine-derived acceptors. An overview

Graja

Golub

2003

Comptes Rendus. Chimie

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The results of the studies of the physical properties of organic composites obtained by direct solid-solid charge-transfer (CT) reaction between bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) and iodine or gold iodide are presented and discussed. It is shown that the analysis of experimental data of dc conductivity and thermoelectric power and the relation between morphology of composites and their electrical properties result in understanding the charge transport phenomena and allow to propose the model of electrical transport in these materials. The main factors that affect the electrical properties of composites are recognized and the ways of controlling these factors and tuning the electrical properties are proposed.

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Section: Organic Charge-transfer Complexes: Single Crystals and Compo...mentioning

confidence: 71%

Section: Principles and Remarks On The Composite Technologymentioning

confidence: 99%

Multiphase structure and physical properties of organic composites obtained by mechanochemical reaction between BEDT–TTF and iodine-derived acceptors. An overview

Graja

Golub

2003

Comptes Rendus. Chimie

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“…Composite samples are prepared according to the general procedure described previously [4,6,8,13,14]. Well-defined proportions x of a solid donor (BEDT-TTF or BEDO-TTF) and solid acceptor (I, AuI or AuI 3 ) are ground together for several hours.…”

Section: Methodsmentioning

confidence: 99%

“…As it appears from the earlier investigations [4][5][6][7][8][9][13][14][15], BEDT-TTF-derived composites have a granular structure and consist mainly of (BEDT-TTF) 2 I 3 and (BEDT-TTF) 2 AuI 2 grains, separated by insulating phases including non-reacted substrates. Annealing of samples results in recrystallization of the grains and improves electric contact between them.…”

Section: Introductionmentioning

confidence: 97%

“…However, these materials are usually crystallized in the form of tiny and brittle crystals, which makes their investigation difficult and their applications impossible. To eliminate this drawback, the method of composite preparation in direct solid-solid CT reaction has been worked out [3][4][5][6]. Among these materials, the composites obtained by a mechanochemical CT reaction between electron donors BEDT-TTF or bis-(ethylenedioxy)tetrathiafulvalene (BEDO-TTF) and acceptors such as I, AuI or AuI 3 are especially interesting, as they exhibit high conductivity, a metallic character [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Thermoelectric power studies of organic conducting composites (BEDT-TTF)_x/Y (Y = I, AuI, AuI₃) and (BEDO-TTF)_x/I

Golub¹,

Graja²

2003

J. Phys. D: Appl. Phys.

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The results of studies on the thermoelectric power of organic composites formed by a direct charge transfer reaction in the solid state, of general formula (BEDT-TTF) x /Y (Y = I, AuI, AuI 3 ) and (BEDO-TTF) x /I, where BEDT-TTF means bis-(ethylenedithio)tetrathiafulvalene and BEDO-TTF is bis-(ethylenedioxy)tetrathiafulvalene, are presented. It is shown that the thermoelectric power of these materials arises mainly from the contribution of the conducting grains (BEDT-TTF) 2 I 3 and (BEDT-TTF) 2 AuI 2 in (BEDT-TTF) x /Y composites and the grains (BEDO-TTF) 2.4 I 3 in (BEDO-TTF) x /I composites. The contribution of the insulating intergrain phase is small for x ≈ x opt . The results are consistent with predictions of effective-medium theory for thermoelectric power in inhomogeneous materials. The conclusion is that the thermoelectric properties of grains in highly conducting composites are nearly the same as the properties of the single crystals.

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Regioselective Carbon–Carbon Bond Formation Reactions between TCNE or TCNQ and a Quinonoid Ring

et al. 2006

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Conducting Organic Composites

Cited by 8 publications

References 67 publications

Multiphase structure and physical properties of organic composites obtained by mechanochemical reaction between BEDT–TTF and iodine-derived acceptors. An overview

Multiphase structure and physical properties of organic composites obtained by mechanochemical reaction between BEDT–TTF and iodine-derived acceptors. An overview

Thermoelectric power studies of organic conducting composites (BEDT-TTF)_x/Y (Y = I, AuI, AuI₃) and (BEDO-TTF)_x/I

Regioselective Carbon–Carbon Bond Formation Reactions between TCNE or TCNQ and a Quinonoid Ring

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Conducting Organic Composites

Cited by 8 publications

References 67 publications

Multiphase structure and physical properties of organic composites obtained by mechanochemical reaction between BEDT–TTF and iodine-derived acceptors. An overview

Multiphase structure and physical properties of organic composites obtained by mechanochemical reaction between BEDT–TTF and iodine-derived acceptors. An overview

Thermoelectric power studies of organic conducting composites (BEDT-TTF)x/Y (Y = I, AuI, AuI3) and (BEDO-TTF)x/I

Regioselective Carbon–Carbon Bond Formation Reactions between TCNE or TCNQ and a Quinonoid Ring

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Thermoelectric power studies of organic conducting composites (BEDT-TTF)_x/Y (Y = I, AuI, AuI₃) and (BEDO-TTF)_x/I