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Author:
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ISBN:
Category :
Languages : en
Pages : 350
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Book Description
Two-dimensional infrared (2D IR) spectroscopy has been used to study molecular interactions and dynamics within complex systems for years. However, limitations in experimental design and sample concentration have limited its scientific breadth. In this thesis work, new technical advancements have been added to a 2D IR optical table to both increase the throughput of mid-IR to the sample cell as well as simplify the alignment when changing laser pulse wavelengths. By incorporating more reflective optics into a standard 2D IR pulse shaper, initial alignment and realignment due to a change in wavelengths are greatly simplified. Additionally, studies on dye-sensitized thin films have revealed the presence of dye aggregate domains at the interface. Vibrational coupling and energy transfer between aggregate domains could influence both the electron transfer mechanism and kinetics between the dye and semiconductor interface. With these new technological advances and thin film characterizations, preliminary work studying a monolayer of dyes on a glass window are presented. Using 2D IR to study monolayers gives interface specificity without the need of more complicated experimental designs like 2D sum frequency generation (SFG) spectroscopy. These technological advances will surely prove to expand the range of systems and problems that 2D IR spectroscopy can characterize and solve.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 350
Get Book Here
Book Description
Two-dimensional infrared (2D IR) spectroscopy has been used to study molecular interactions and dynamics within complex systems for years. However, limitations in experimental design and sample concentration have limited its scientific breadth. In this thesis work, new technical advancements have been added to a 2D IR optical table to both increase the throughput of mid-IR to the sample cell as well as simplify the alignment when changing laser pulse wavelengths. By incorporating more reflective optics into a standard 2D IR pulse shaper, initial alignment and realignment due to a change in wavelengths are greatly simplified. Additionally, studies on dye-sensitized thin films have revealed the presence of dye aggregate domains at the interface. Vibrational coupling and energy transfer between aggregate domains could influence both the electron transfer mechanism and kinetics between the dye and semiconductor interface. With these new technological advances and thin film characterizations, preliminary work studying a monolayer of dyes on a glass window are presented. Using 2D IR to study monolayers gives interface specificity without the need of more complicated experimental designs like 2D sum frequency generation (SFG) spectroscopy. These technological advances will surely prove to expand the range of systems and problems that 2D IR spectroscopy can characterize and solve.
Author: Joshua Stephen Ostrander
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Two-dimensional infrared spectroscopy (2D IR) is a nonlinear spectroscopic technique with applications in fields ranging from biophysics to materials science. In this dissertation, I report several new technical advances in 2D IR spectroscopy and provide examples of some applications in biophysics and materials science. The advances presented will lead to wider adoption in both the complexity of scientific questions that 2D IR can address and reduce the barrier for non-experts to enter the field. In the first study, I report the development of pulse shaping based Fourier transform infrared (FTIR) spectroscopic imaging. We show that the microscope can distinguish between chemical species with diffraction limited resolution. Second, I present the design and construction of the first wide-field microscope to spatially resolve 2D IR spectra. The differences in image formation between FTIR and 2D IR images are also presented. Next, I present an application of 2D IR spectroscopy to the study of energy transfer in the secondary explosive pentaerythritol tetranitrate (PETN). The FTIR and time-dependent 2D IR spectra are presented and energy transfer is identified. Additionally, we use transition dipole strength measurements to conclude that the excitations are delocalized over 15-30 nitrate ester groups. I also present methods for measuring the 2D IR spectra of monolayers by capitalizing on the signal enhancement from plasmonic gold films. Additionally, we show that a reflection geometry can further enhance signal strengths. We study the structure of cysteine terminated ovispirin on a gold surface in [D2O] and [H2O]. In the seventh chapter, I present a 2D IR immuno-sensor to measure the structure of proteins extracted from solution. The experiment utilizes surface-enhanced 2D IR spectroscopy to measure a monolayer of sequence specific antibodies chemically linked to a thin film of gold. We also show that that we can resolve single isotope labels on the antibody. Finally, I present the design and construction of a 50 kHz 2D IR spectrometer with a KGW doped Ytterbium amplifier. I present the design of our home-built optical parametric amplifier and evaluate the performance of the system in high repetition rate 2D IR measurements.
Author: Valeri P. Tolstoy
Publisher: John Wiley & Sons
ISBN: 047135404X
Category : Technology & Engineering
Languages : en
Pages : 741
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Book Description
Because of the rapid increase in commercially available Fourier transform infrared spectrometers and computers over the past ten years, it has now become feasible to use IR spectrometry to characterize very thin films at extended interfaces. At the same time, interest in thin films has grown tremendously because of applications in microelectronics, sensors, catalysis, and nanotechnology. The Handbook of Infrared Spectroscopy of Ultrathin Films provides a practical guide to experimental methods, up-to-date theory, and considerable reference data, critical for scientists who want to measure and interpret IR spectra of ultrathin films. This authoritative volume also: Offers information needed to effectively apply IR spectroscopy to the analysis and evaluation of thin and ultrathin films on flat and rough surfaces and on powders at solid-gaseous, solid-liquid, liquid-gaseous, liquid-liquid, and solid-solid interfaces. * Provides full discussion of theory underlying techniques * Describes experimental methods in detail, including optimum conditions for recording spectra and the interpretation of spectra * Gives detailed information on equipment, accessories, and techniques * Provides IR spectroscopic data tables as appendixes, including the first compilation of published data on longitudinal frequencies of different substances * Covers new approaches, such as Surface Enhanced IR spectroscopy (SEIR), time-resolved FTIR spectroscopy, high-resolution microspectroscopy and using synchotron radiation
Author:
Publisher: Academic Press
ISBN: 9780125330213
Category : Technology & Engineering
Languages : en
Pages : 387
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Book Description
Physics of Thin Films is one of the longest running continuing series in thin film science, consisting of twenty volumes since 1963. The series contains quality studies of the properties of various thinfilms materials and systems. In order to be able to reflect the development of today's science and to cover all modern aspects of thin films, the series, starting with Volume 20, has moved beyond the basic physics of thin films. It now addresses the most important aspects of both inorganic and organic thin films, in both their theoretical as well as technological aspects. Therefore, in order to reflect the modern technology-oriented problems, the title has been slightly modified from Physics of Thin Films to Thin Films. Discusses the latest research about structure, physics, and infrared photoemissive behavior of heavily doped silicon homojunctions and Ge and GaAs-based alloy junctions Reviews the current status of SiGe/Si quantum wells for infrared detection Discusses key developments in the growing research on quantum-well infrared photodetectors (QWIPs) Reviews Chois development of a family of novel three-terminal, multi-quantum well devices designed to improve high-temperature IR detectivity at long wavelengths Describes recent studies aimed at using multi-quantum well structures to achieve higher performance in solar cell devices based on materials systems
Author: Izabella Brand
Publisher:
ISBN: 9783844029659
Category :
Languages : en
Pages : 124
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Book Description
Author: Theodor Schneller
Publisher: Springer Science & Business Media
ISBN: 3211993118
Category : Technology & Engineering
Languages : en
Pages : 801
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Book Description
This is the first text to cover all aspects of solution processed functional oxide thin-films. Chemical Solution Deposition (CSD) comprises all solution based thin- film deposition techniques, which involve chemical reactions of precursors during the formation of the oxide films, i. e. sol-gel type routes, metallo-organic decomposition routes, hybrid routes, etc. While the development of sol-gel type processes for optical coatings on glass by silicon dioxide and titanium dioxide dates from the mid-20th century, the first CSD derived electronic oxide thin films, such as lead zirconate titanate, were prepared in the 1980’s. Since then CSD has emerged as a highly flexible and cost-effective technique for the fabrication of a very wide variety of functional oxide thin films. Application areas include, for example, integrated dielectric capacitors, ferroelectric random access memories, pyroelectric infrared detectors, piezoelectric micro-electromechanical systems, antireflective coatings, optical filters, conducting-, transparent conducting-, and superconducting layers, luminescent coatings, gas sensors, thin film solid-oxide fuel cells, and photoelectrocatalytic solar cells. In the appendix detailed “cooking recipes” for selected material systems are offered.
Author: Jef Poortmans
Publisher: John Wiley & Sons
ISBN: 0470091266
Category : Science
Languages : en
Pages : 504
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Book Description
Thin-film solar cells are either emerging or about to emerge from the research laboratory to become commercially available devices finding practical various applications. Currently no textbook outlining the basic theoretical background, methods of fabrication and applications currently exist. Thus, this book aims to present for the first time an in-depth overview of this topic covering a broad range of thin-film solar cell technologies including both organic and inorganic materials, presented in a systematic fashion, by the scientific leaders in the respective domains. It covers a broad range of related topics, from physical principles to design, fabrication, characterization, and applications of novel photovoltaic devices.
Author: Tze-Chien Sum
Publisher: John Wiley & Sons
ISBN: 3527341110
Category : Technology & Engineering
Languages : en
Pages : 312
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Book Description
Real insight from leading experts in the field into the causes of the unique photovoltaic performance of perovskite solar cells, describing the fundamentals of perovskite materials and device architectures. The authors cover materials research and development, device fabrication and engineering methodologies, as well as current knowledge extending beyond perovskite photovoltaics, such as the novel spin physics and multiferroic properties of this family of materials. Aimed at a better and clearer understanding of the latest developments in the hybrid perovskite field, this is a must-have for material scientists, chemists, physicists and engineers entering or already working in this booming field.
Author: Babak Anasori
Publisher: Springer Nature
ISBN: 3030190269
Category : Technology & Engineering
Languages : en
Pages : 534
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Book Description
This book describes the rapidly expanding field of two-dimensional (2D) transition metal carbides and nitrides (MXenes). It covers fundamental knowledge on synthesis, structure, and properties of these new materials, and a description of their processing, scale-up and emerging applications. The ways in which the quickly expanding family of MXenes can outperform other novel nanomaterials in a variety of applications, spanning from energy storage and conversion to electronics; from water science to transportation; and in defense and medical applications, are discussed in detail.
Author:
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 1948
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Book Description
