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By Jordi Fraxedas

The curiosity in molecular natural fabrics is great, pushed through the necessity to locate new fabrics with fascinating homes. This publication goals to carry the fabrics and floor technological know-how groups jointly, integrating physics and chemistry in a non-technical demeanour, making sure this attention-grabbing box might be understood via a multi disciplinary viewers. beginning with easy actual strategies and artificial recommendations, the publication describes how molecules gather into hugely ordered constructions as unmarried crystals and skinny movies, with examples of characterization, morphology and houses. distinct emphasis is put on the significance of surfaces and interfaces. the ultimate bankruptcy offers a private view on destiny probabilities within the box. Written for rookies and skilled chemists, physicists and fabric scientists, it will be an invaluable advent to the sector of molecular natural fabrics.

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7). Following the common practice, Sch¨onflies and short Hermann–Mauguin symbols will be used for point and space groups, respectively. , Cotton, 1971. Let us start with the neutral molecule TTF, the fundamental building block of an immense pool of CTSs exhibiting magnetic ground states, semiconducting, metallic or superconducting properties that will be extensively discussed in the book. 3 shows a TTF molecule oriented in a Cartesian coordinate system, where the long molecular axis is arbitrarily set along the x-axis.

Therefore, comparison of the obtained magnitudes is sometimes difficult. We will insist throughout the book that it is imperative to evaluate the quality of the samples (single crystals or films) before discussing intrinsic physical properties. In addition, the phenomenology of charge generation and transport is complex for organic materials, including polymers, and fundamental research has to be pursued. 4. 1). , 1972). 6. 4e Note: All energies in eV. E es is defined as the HOMO-LUMO peak-to-peak gap as determined by photoemission and inverse photoemission measurements.

Overlap along the stack (b-axis) is the origin of its 1D metallic behaviour. σ is highly anisotropic: σb /σa ∼ 103 at RT, where σa and σb represent the conductivity along the a- and b-directions, respectively. 15. Crystal structure of TTF-TCNQ: perspective view along the stacking b-axis. 46◦ . C, S and N atoms are represented by black, medium grey and light grey balls, respectively. H atoms are not represented for clarity. , 1974. metal–semiconductor (also known as metal–insulator) transition occurs at c.

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