Structural Studies Of Ultrathin Organic Films

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Structural Studies Of Ultrathin Organic Films

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Author : Hyun Yim
language : en
Publisher:
Release Date : 1998

Structural Studies Of Ultrathin Organic Films written by Hyun Yim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Infrared spectroscopy categories.

An Introduction To Ultrathin Organic Films

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Author : Abraham Ulman
language : en
Publisher: Academic Press
Release Date : 2013-10-22

An Introduction To Ultrathin Organic Films written by Abraham Ulman and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Science categories.

The development of oriented organic monomolecular layers by the Langmuir-Blodgett (LB) and self-assembly (SA) techniques has led researchers toward their goal of assembling individual molecules into highly ordered architectures. Thus the continually growing contribution of LB and SA systems to the chemistry and physics of thin organic films is widely recognized. Equally well-known is the difficulty in keeping up to date with the burgeoning multidisciplinary research in this area. Dr. Ulman provides a massive survey of the available literature. The book begins with a section on analytical tools to broaden the understanding of the structure and properties of monolayers and films. Following sections discuss LB films, the preparation and properties of SA monolayers and films, the modeling of LB and SA monolayers, and the application of LB and SA films.

Vibrational And Structural Properties Of Ultrathin Hetero Organic Films

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Author : Sebastian Thussing
language : en
Publisher:
Release Date : 2017

Vibrational And Structural Properties Of Ultrathin Hetero Organic Films written by Sebastian Thussing and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

Structure And Dynamics Of Ultrathin Organic Films

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Author :
language : en
Publisher:
Release Date : 2000

Structure And Dynamics Of Ultrathin Organic Films written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.

Organized Organic Ultrathin Films

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Author : Katsuhiko Ariga
language : en
Publisher: John Wiley & Sons
Release Date : 2012-09-24

Organized Organic Ultrathin Films written by Katsuhiko Ariga and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-09-24 with Technology & Engineering categories.

This handy reference is the first comprehensive book covering both fundamentals and recent developments in the field with an emphasis on nanotechnology. Written by a highly regarded author in the field, the book details state-of-the-art preparation, characterization and applications of thin films of organic molecules and biomaterials fabricated by wet processes and also highlights applications in nanotechnology The categories of films covered include monomolecular films (monolayers) both on a water surface and on a solid plate, Langmuir-Blodgett films (transferred multilayer films on a solid plate from a water surface), layer-by-layer films (adsorbed multilayer films on a solid support), and spontaneously assembled films in solution.

Structure And Dynamics Of Ultrathin Organic Films Microform

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Author : Tatyana A. Kiktyeva
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 2000

Structure And Dynamics Of Ultrathin Organic Films Microform written by Tatyana A. Kiktyeva and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Monomolecular films categories.

Structural Design And Photochemical Preparation Of Ultrathin Molecular Film Materials

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Author :
language : en
Publisher:
Release Date : 2006

Structural Design And Photochemical Preparation Of Ultrathin Molecular Film Materials written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

Toward the goal of developing fundamental understanding of structural properties of molecular thin films to form a scientific basis for designing and preparation of molecular thin film materials, we have made important advances during the past three years. These advances were enabled through applying a combination of ultrahigh vacuum surface science and nonlinear optical techniques to the characterization of thin molecular films. Specifically we have demonstrated for the first time that the nonlinear optical technique Second Harmonic Generation can be used to determine the geometric structure of the interfacial layer of molecules buried in between the molecular film and the solid substrate, and that surface-state enhanced SHG can be used to probe the wetting-dewetting transition of monolayer molecular adsorbates on a metal. The nature of bonding between the layer of linear acenes, molecules such as tetracene and pentacene that have great potential as organic semiconducting materials, have been determined. Overall, we have gained to great extend a fundamental understanding of molecular film deposition, growth, and crystallization mechanisms. This research effort has resulted in a total of 13 referred publications since 2004 to date (listed at the end of the report). A more detailed description of research results are presented below.

Profile Structures Of Ultrathin Organic Films On Germanium Silicon Multilayer Substrates By X Ray Interferometry Holography

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Author : Songtao Xu
language : en
Publisher:
Release Date : 1993

Profile Structures Of Ultrathin Organic Films On Germanium Silicon Multilayer Substrates By X Ray Interferometry Holography written by Songtao Xu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

Incorporating Two Dimensional Inorganic Extended Lattice Structures And Magnetic Properties Into Ultrathin Organic Films

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Author : Candace Tricia Seip
language : en
Publisher:
Release Date : 1997

Incorporating Two Dimensional Inorganic Extended Lattice Structures And Magnetic Properties Into Ultrathin Organic Films written by Candace Tricia Seip and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Composite materials categories.

Molecular Layer Deposition

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Author : David S. Bergsman
language : en
Publisher:
Release Date : 2018

Molecular Layer Deposition written by David S. Bergsman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.

In recent years, many technological advancements in medicine, renewable energy, water purification, and semiconductor processing have resulted from access to nanotechnology. Though we have many methods for creating nano-sized features, our current nanomaterials toolkit must continue to expand in order to meet the increasing demand for smaller features, more complex architectures, and reduced defect frequencies required by these applications. Molecular layer deposition (MLD) is a promising new method for expanding that toolkit, allowing for the incorporation of organic components into ultrathin materials and nanostructures through a vapor-phase, layer-by-layer synthesis approach. Although a decade and a half of development has already gone into MLD, there is still a significant gap in our understanding of the mechanisms behind MLD growth and the microscopic properties of the resulting films, such as their molecular-level structure. This dissertation presents work to better understand these fundamental properties of MLD and use that understanding to control the thermal, mechanical, and catalytic properties of these materials. In the first half of this work, a study of the structure and growth behavior of organic MLD films is performed. First, the properties of polyurea films are explored as a function of backbone flexibility. Our results suggest that changes in growth rate between the most rigid and most flexible backbones (4 Å/cycle vs 1 Å/cycle) are not caused by differences in the length of molecular precursors, chain orientation (~25° on average for each backbone), or film density (1.0 -- 1.2 g/cm3), but instead are caused by an increased frequency of terminations in the more flexible chemistries. Measurement of the crystallinity and growth angle further suggest that polyurea MLD films exhibit multiple domains, with some chains adopting horizontally packed structures and some chains growing more out-of-plane, leading to an average growth angle of 25°. Interestingly, the observed terminations do not result in the complete cessation of film growth, suggesting that precursors may be absorbing into the film through non-covalent linkages. To observe these absorptions events, MLD is performed on surfaces whose reaction sites have been intentionally eliminated. These terminations are shown to be effective at reducing the growth rate of MLD, suggesting that MLD growth rates are heavily dependent on the number of reaction sites. However, after several cycles, the film growth rate is able to recover, suggesting that monomers have absorbed into the films to reintroduce new reaction sites. A model of growth is developed based on a site balance which suggests that roughly 3% of the chains are terminated by double reactions every cycle. Taken as a whole, this work provides a new paradigm for the growth of MLD films, showing that the films do not adopt the simple layer-by-layer covalent network that is typically portrayed for MLD. MLD has many potential applications in energy and semiconductor manufacturing. In the second half of this thesis, two studies related to the development of MLD are explored. First, a relatively unstudied "manganicone" manganese hybrid MLD chemistry is synthesized using bis(ethylcyclopentadienyl)manganese and ethylene glycol for use as an electrochemically-relevant catalyst material. Characterization of the composition and crystal structure of these films shows them to grow as manganese alkoxides, which partially degrade upon exposure to air into manganese carboxylates. Annealing the hybrid films to remove the carbon is shown to eliminate any porosity introduced through the incorporation of the organic components. However, annealed hybrid films are shown to be less prone to restructuring than ALD-grown MnOx, making them potentially desirable materials for electrodes in thin film batteries. Second, an investigation of the self-assembly of dodecanethiols from the vapor phase onto copper oxide was performed. Dodecanethiols are often used as a blocking layer in area-selective ALD and MLD. The thiols are shown to etch the surface of the CuO to create well-ordered copper-thiolate multilayers several nanometers thick, with crystallites oriented parallel and perpendicular to the substrate surface. In addition, after exposure to air for several days, the multilayer films ripen into particles several microns wide and several hundred nanometers high over the course of several days. This ripening has never before been observed for thiols deposited on copper or copper oxide Finally, a conclusion is presented with several perspectives on the possible use of MLD in the future.