Optoelectronics, self-assembled

The formation of nanostructures such as nanodot arrays has drawn a great attention due to the feasible applications in a variety of functional structures and nanodevices containing optoelectronic device, information storage, and sensing media [1-3]. The various methods such as self-assembled nanodots from solution onto substrate, strain-induced growth, and template-based methods have been proposed for the fabrication of nanodot arrays on a large area, [4-6]. However, most of these works can be applied to the small scale systems due to the limited material systems. 

Hierarchically Structured Organic Optoelectronic Materials via Self-Assembly... 

Supramolecular self-assembly has recently been extensively investigated as a tool to create nanostructured or hierarchically structured optoelectronically active materials from monodisperse, conjugated oligomers because such n-conjugated organic materials are interesting candidates for the fabrication of organic... 

Another challenge is achieving the self-assembly of multiple materials in a controlled manner. While Chapter 4 describes approaches that yield multilayer structures, much of this book focuses on essentially two-dimensional structures. Many of the existing multilayer structures show interpenetration of the layers, thus making the resulting devices inefficient and limiting the fundamental insights into the optoelectronic properties that can be obtained. 

Wasielewski s research interests comprise photoinduced electron transfer and charge transport in organic molecules and materials, artificial and natural photosynthesis, self-assembly of nanoscale materials, spin dynamics of multispin organic molecules, materials for molecule-based optoelectronics and spintronics, and time-resolved optical and magnetic resonance spectroscopy. His research has resulted in over 300 publications. Dr. Wasielewski was elected a fellow of the American Association for the Advancement of Science in 1995, and has held numerous distinguished lectureships and fellowships. Among Wasielewski s recent awards are the 2004 Photochemistry Research Award of the Inter-American Photochemical Society and the 2006 James Flack Norris Award in Physical Organic Chemistry of the American Chemical Society. 

Synthesis of concave truxene derived of tetrathiafulvalene-type donors as supramolecular partners for convex fullerenes, to be used in the manufacture of fullerene-based self-assembled optoelectronic devices, was described. This synthesis was realized via the Horner-Wittig reaction of truxene and 2-dimethoxyphosphoryl-l,3-dithioles <2007AG(E)1847>. IR and Raman spectral studies of other fullerene-tetrathiafulvalene based systems were performed <2007CPH289>. 

Up to date, two AIMD studies have been performed in this field. The first dealt with self-assembled polypeptides nanotubes [28]. These systems have a variety of potential application in biochemistry and material science, from optoelectronics to the construction of drug delivery vehicles. Calculations carried out on Cyclo[D-Ala-Glu-D-Ala-Gln]2 in the crystal phase showed also in this case excellent agreement with available structural data and provided novel information on intra- and intermolecular H-bond patterns. 

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