By Jordi Fraxedas
The curiosity in molecular natural fabrics is large, pushed via the necessity to locate new fabrics with fascinating homes. This ebook goals to deliver the fabrics and floor technological know-how groups jointly, integrating physics and chemistry in a non-technical demeanour, making sure this interesting box should be understood through a multi disciplinary viewers. beginning with easy actual innovations and artificial suggestions, the booklet describes how molecules gather into hugely ordered constructions as unmarried crystals and skinny motion pictures, with examples of characterization, morphology and houses. targeted emphasis is put on the significance of surfaces and interfaces. the ultimate bankruptcy provides a private view on destiny probabilities within the box. Written for newcomers and skilled chemists, physicists and fabric scientists, it will be an invaluable advent to the sphere of molecular natural fabrics.
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Additional info for Molecular Organic Materials: From Molecules to Crystalline Solids
6. 9. 692 nm. , 1964. (b) ab-plane of coronene. 8◦ . Crystal structure from Robertson & White, 1945. (c) bc-plane of heptafulvalene. 03◦ . Crystal structure from Thomas & Coppens, 1972. 5 Molecular organic materials When classifying a given material according to its physical properties, the common tendency is to emphasize the most important property: metallicity, superconductivity, magnetic order, etc. , since the same material can behave differently when spanning the parameter hyperspace. The parameter hyperspace consists of the set of variables and will be deﬁned in detail in Chapter 3.
Bromine), that is by doping the insulating crystal. Doping is the key issue in the synthesis of conductors that may become superconductors under particular physical conditions, hence its importance. Superconductors will be discussed in the next subsection. In the case of polymers, metallicity can also be obtained by doping. At this point we can differentiate four ways of doping: disordered, ordered, self (or internal) and interfacial. ), while ordered doping will be used for hybrid materials consisting of two sublattices: one corresponding to the organic part and one corresponding to the inorganic part.
If the tip is sufﬁciently sharp, the contact area is of the order of a few nm2 , so that pull-off involves breaking a small integer number of bonds. In the example discussed here a gold-covered AFM tip has been covered with a SAM consisting of an alkyl linear chain with a thiol end that binds covalently to the gold ﬁlm, and a TMPD end. Additionally, a ﬂat gold surface has been covered with a SAM again with a thiol end and a TCNQ end. , 2002a). In these experiments an ultrasharp AFM tip (tip radius R < 10 nm) indents a ﬂat surface of a single crystal and the dynamical mechanical response of the surface during indentation is transformed into a force plot (applied force vs.