470 Subject heterostructures

Six of the eleven chapters are devoted primarily to the intercalation chemistry of smectite clays, the most versatile among all lamellar compounds. Two of these chapters are devoted to the experimental and theoretical aspects of the clay structures and surface chemistry, including chemical catalysis. Organo clays and polymer-clay nanocomposites, the adsorption of nitroaromatic compounds of environmental significance onto clay surfaces, photochemical processes, and pillared clays and porous clay heterostructures are the subjects of the remaining four chapters. These six chapters provide detailed discussions of the factors that influence access to the intragallery surfaces of the clay host and the materials properties of the resulting intercalates. 

The content of this Handbook reflects the fact that the bulk of knowledge in this field concerns clays. In Part 1, which concentrates on clays, there is considerable focus on clay-organic interactions because of their relevance to catalysis. A chapter on nitroaromatic compound sorption is included because it provides an excellent example of clay-organic interactions. Other pertinent topics include molecular modeling of surface chemistry and photochemical processes, including photocatalysis. Pillared clays and porous clay heterostructures are the subject of an entire chapter. Chapters in Part 2 cover synthesis, characterization, host-guest pillaring, sorption, and catalysis for each class of layered material. 

The study of electronic processes in organic semiconducting heterostructures has been a subject of recent extensive research efforts. Of particular importance are the efforts to fabricate and study organic multiple quantum wells (OMQW s) structures, in which the charge carriers are confined in one direction to a characteristic length which is smaller than their De-Broglie wavelength. These efforts are motivated by both the... 

The subject matter of this book includes the following materials clays, pillared clays and pillared clay heterostructures, together with layered analogs of... 

Relatively homogeneous fullerene LB films can be formed by mixing with arachidic acid [333]. This mixed film was used to construct a heterostructure with a PHT-arachidic acid layer, although no (bi)polaron formation was observed [341]. Donor-acceptor complexes of Cso with tetra(hexadecylthio)-TTF and BEDT-TTF were subjected to LB work. In both cases, multilayer film was formed at the air-water interface. Conductivity values of 4 and 20 S/cm for the tetra-(hexadecylthio)-TTF/C6o and the BEDT-TTF/Ceo system, respectively, were obtained after iodine doping of LB films [342]. 

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