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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Program
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Program
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: D. O. Frazier
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 310
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Book Description
Author: D. O. Frazier
Publisher:
ISBN:
Category :
Languages : en
Pages : 307
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Book Description
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729376966
Category : Science
Languages : en
Pages : 62
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Book Description
Some of the primary purposes of this work are to study important technologies, particularly involving thin films, relevant to organic and polymeric materials for improving applicability to optical circuitry and devices and to assess the contribution of convection on film quality in unit and microgravity environments. Among the most important materials processing techniques of interest in this work are solution-based and by physical vapor transport, both having proven gravitational and acceleration dependence. In particular, PolyDiAcetylenes (PDA's) and PhthaloCyanines (Pc's) are excellent NonLinear Optical (NLO) materials with the promise of significantly improved NLO properties through order and film quality enhancements possible through microgravity processing. Our approach is to focus research on integrated optical circuits and optoelectronic devices relevant to solution-based and vapor processes of interest in the Space Sciences Laboratory at the Marshall Space Flight Center (MSFC). Modification of organic materials is an important aspect of achieving more highly ordered structures in conjunction with microgravity processing. Parallel activities include characterization of materials for particular NLO properties and determination of appropriation device designs consistent with selected applications. One result of this work is the determination, theoretically, that buoyancy-driven convection occurs at low pressures in an ideal gas in a thermalgradient from source to sink. Subsequent experiment supports the theory. We have also determined theoretically that buoyancy-driven convection occurs during photodeposition of PDA, an MSFC-patented process for fabricating complex circuits, which is also supported by experiment. Finally, the discovery of intrinsic optical bistability in metal-free Pc films enables the possibility of the development of logic gate technology on the basis of these materials. Frazier, Donald O. and Paley, Mark S. and Penn, Benjamin G. and Abdelda...
Author:
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Category : Aeronautics
Languages : en
Pages : 704
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 64
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Author: Donald O. Frazier
Publisher:
ISBN:
Category : Optical bistability
Languages : en
Pages : 51
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Book Description
Some of the primary purposes of this work are to study important technologies, particularly involving thin films, relevant to organic and polymeric materials for improving applicability to optical circuitry and devices and to assess the contribution of convection on film quality in unit and microgravity environments. Among the most important materials processing techniques of interest in this work are solution-based and by physical vapor transport, both having proven gravitational and acceleration dependence. In particular, polydiacetylenes (PDA's) and phthalocyanines (Pc's) are excellent nonlinear optical (NLO) materials with the promise of significantly improved NLO properties through order and film quality enhancements possible through microgravity processing. Our approach is to focus research on integrated optical circuits and optoelectronic devices relevant to solution-based and vapor processes of interest in the Space Sciences Laboratory at the Marshall Space Flight Center (MSFC). Modification of organic materials is an important aspect of achieving more highly ordered structures in conjunction with microgravity processing. Parallel activities include characterization of materials for particular NLO properties and determination of appropriation device designs consistent with selected applications. One result of this work is the determination, theoretically, that buoyancy-driven convection occurs at low pressures in an ideal gas in a thermalgradient from source to sink. Subsequent experiment supports the theory. We have also determined theoretically that buoyancy-driven convection occurs during photodeposition of PDA, an MSFC-patented process for fabricating complex circuits, which is also supported by experiment. Finally, the discovery of intrinsic optical bistability in metal-free Pc films enables the possibility of the development of logic gate technology on the basis of these materials
Author:
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ISBN:
Category : Science
Languages : en
Pages : 1438
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Author:
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ISBN:
Category : Fluid dynamics (Space environment)
Languages : en
Pages : 320
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Book Description
Author: Marcello Lappa
Publisher: Elsevier
ISBN: 9780080445083
Category : Science
Languages : en
Pages : 542
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Book Description
Space research -- Fundamental concepts, mathematical models and scaling analysis for the microgravity environment -- Dispersed droplets and metal alloys -- Growth of semiconductors : the floating zone technique -- Macromolecular crystal growth : surface kinetics and morphological studies -- Macromolecular crystal growth at macroscopic length scales -- The growth of biological tissues.
