No description available.

No description available.

No description available.

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.

La compression directe est l’une des méthodes de fabrication de comprimés les plus communes et économiques de l’industrie pharmaceutique. Cependant, l’utilisation de ce procédé requiert souvent un changement de formulation. Puisque le séné, un extrait naturel de plante, n’est pas un matériel compressible, des méthodologies de conception d’expériences et de qualité par conception ont été utilisées pour développer une formulation convenable pour la compression directe des comprimés de séné. Le nouveau produit formulé a démontré plusieurs bénéfices reliés au temps de fabrication, aux besoins en main d’œuvre et aux besoins en machineries. De plus, la stabilité du produit, emballé dans des bouteilles de polyéthylène exposées à des conditions extrêmes pendant six mois, a démontré des résultats conformes aux limites spécifiées à l’interne. Cependant, il reste quelques défis à relever concernant la détermination de la vitesse de fabrication à grande échelle et de la stabilité du produit à long terme. Néanmoins, l’implémentation du procédé de compression directe démontre suffisamment de bénéfices à long terme pour remplacer le procédé courant de granulation humide. / Direct compression is becoming one of the most common and economical method of tablets manufacturing in the pharmaceutical industry. However, the feasibility of this process often results in formulation change. Since senna powder, a natural plant extract, is not a compressible material, methodologies such as Design of Experiments (DOE) and Quality by Design (QbD) were used in this project to develop a suitable formulation for the direct compression process of senna tablets. The newly formulated product demonstrated benefits with regards to process time, manpower and machinery requirements. Furthermore, product stability in high density polyethylene bottles exposed to accelerated conditions over a six months period, demonstrated results that conforms to the limits specified in-house. Nevertheless, a few challenges remain in terms of establishing the process speed in large scale manufacturing and establishing the product shelf life upon completion of long term stability studies. In spite of these challenges, implementing the direct compression process to manufacture senna tablets instead of continuing with the wet granulation process demonstrated sufficient benefits to adopt this new process for the long run.

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.