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As an important type of organic semiconductors, organic small molecule crystals have great potential for low-cost applications such as plastic solar cells (PSC), organic light emitting diodes (OLED) and organic field-effect transistors (OFET). Among numerous molecular crystals, 6, 13-Bis(triisopropylsilylethynyl)pentacene (Tips-pentacene) has aroused much attention because it combines good solubility in common solvents and strong π-π stacking from self-assembly. However, the inability to achieve ordered array of Tips-pentacene prevents the fabrication of high-performance organic integrated circuits. In this work, two new fabrication methods to pattern Tips-pentacene micro- and nano-scale single crystals are proposed. Both methods are facilitated by nanofabrication techniques such as nanoimprint and photolithography. In the first method, the surface of a silicon substrate is treated by surfactant coating and Tips-pentacene single crystals are deposited in squared patterns. In the second method, we made an ordered array of Tips-pentacene single crystals confined in Teflon-AF patterns. In both techniques, the effects of solvent type, processing temperature and template pattern size on crystal morphology and size are systematically studied.

Th. Univ.--Sc. de l'ingénieur--Metz, 1994. / Bibliogr. p. 157-163.

Thesis (Ph.D.)--University of Missouri-Columbia, 2005. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (November 15, 2006) Vita. Includes bibliographical references.

Th.--Sci. phys.--Nancy--I.N.P.L., 1983.

Th. 3e cycle--Autom.--Lille 1, 1979. N°: 745.

During the Renaissance era, the builder was the master of both design and fabrication. The Industrial Revolution split these two activities in the pursuit of higher efficiency. Now, the ascendance of digital fabrication could bring the two back together. This study explores the current and future use of digital fabrication in architecture. Digital fabrication is increasingly used to manufacture components for other industries, but it is experiencing slower adoption in the building industry due to size and material limitations and a contract process that makes fabricators less willing to take risks on newer digital technology. A design project was undertaken to establish a digital design-to-fabrication workflow that could work on actual building components for a large-scale built environment. The resulting workflow did offer the advantages of design freedom and the elimination of shop drawings, but the absence of large-scale 3D printing still makes it difficult to quickly fabricate and assemble mass-customized, non-uniform 3D designs.

No description available.