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Author: Anthony Thomas Pelton
Publisher:
ISBN:
Category : Crystallization
Languages : en
Pages : 122
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Book Description
Pulsed laser deposition (PLD) is a promising technique for creating inexpensive, nanostructured thin films which may lead to structures suitable for photocatalysis. During this study, multiple tungsten oxide thin films were prepared using two types of PLD techniques. The first method was conducted at US Photonics, Springfield, MO, using a femtosecond laser while the second method relied on use of an excimer (nanosecond) laser located at Missouri State University. Films were first deposited on glass using both methods at room temperature. Further study was conducted on thin films deposited on sapphire and silicon deposited at room temperatures and at elevated temperatures. In addition to using two types of PLD, an investigation of the properties of tungsten oxide thin films incorporated with alkali metals was conducted. This was achieved by preparing a target using tungsten oxide with small amounts of sodium nitrate (NaNO3). The addition of alkali metals has been known to change the structure as well as the electrical, chemical, and physical properties of the bulk material. After deposition, the thin films were annealed at 450°C up to 30 hours in air. Characterization of the films’ structure and morphology were made using scanning electron microscopy (SEM), x-ray diffraction (XRD), Raman spectroscopy, and x-ray photoelectron spectroscopy (XPS) both before and after annealing. Characterization of the films allowed me to determine which method of PLD as well as which substrate (glass, silicon, or sapphire) is more suitable for growing thin films suitable for photocatalysis applications.
Author: Anthony Thomas Pelton
Publisher:
ISBN:
Category : Crystallization
Languages : en
Pages : 122
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Book Description
Pulsed laser deposition (PLD) is a promising technique for creating inexpensive, nanostructured thin films which may lead to structures suitable for photocatalysis. During this study, multiple tungsten oxide thin films were prepared using two types of PLD techniques. The first method was conducted at US Photonics, Springfield, MO, using a femtosecond laser while the second method relied on use of an excimer (nanosecond) laser located at Missouri State University. Films were first deposited on glass using both methods at room temperature. Further study was conducted on thin films deposited on sapphire and silicon deposited at room temperatures and at elevated temperatures. In addition to using two types of PLD, an investigation of the properties of tungsten oxide thin films incorporated with alkali metals was conducted. This was achieved by preparing a target using tungsten oxide with small amounts of sodium nitrate (NaNO3). The addition of alkali metals has been known to change the structure as well as the electrical, chemical, and physical properties of the bulk material. After deposition, the thin films were annealed at 450°C up to 30 hours in air. Characterization of the films’ structure and morphology were made using scanning electron microscopy (SEM), x-ray diffraction (XRD), Raman spectroscopy, and x-ray photoelectron spectroscopy (XPS) both before and after annealing. Characterization of the films allowed me to determine which method of PLD as well as which substrate (glass, silicon, or sapphire) is more suitable for growing thin films suitable for photocatalysis applications.
Author: Hong Qiu
Publisher:
ISBN:
Category : Information storage and retrieval systems
Languages : en
Pages : 314
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Book Description
Author: M. C. Rao
Publisher: LAP Lambert Academic Publishing
ISBN: 9783845429892
Category :
Languages : en
Pages : 108
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Book Description
The energy conversion, storage and distribution are the important concerns of our civilization in order to meet the challenges of global warming and finite nature of the fossil fuels. In response to the needs of the modern society and emerging technological advancements, it is now essential that new, low cost and environment friendly energy conversion and storage systems are to be developed. As the general tendency of all advanced technologies is towards miniaturization, it is evident that the future development of batteries is aimed at smaller dimensions with higher-energy densities. The development of solid-state batteries parallels the development of semiconductor electronics. Systematic and detailed investigations were made on the growth and characterization of tungsten oxide thin films considering the importance of these films in the fabrication of all solid state microbattery application.
Author: Liviu Duta
Publisher: MDPI
ISBN: 3036510443
Category : Medical
Languages : en
Pages : 224
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Book Description
Despite its limitation in terms of surface covered area, the PLD technique still gathers interest among researchers by offering endless possibilities for tuning thin film composition and enhancing their properties of interest due to: (i) the easiness of a stoichiometric transfer even for very complex target materials, (ii) high adherence of the deposited structures to the substrate, (iii) controlled degree of phase, crystallinity, and thickness of deposited coatings, (iv) versatility of the experimental set-up which allows for simultaneous ablation of multiple targets resulting in combinatorial maps or consecutive ablation of multiple targets producing multi-layered structures, and (v) adjustment of the number of laser pulses, resulting in either a spread of nanoparticles, islands of materials or a complete covering of a surface. Moreover, a variation of PLD, known as Matrix Assisted Pulsed Laser Evaporation, allows for deposition of organic materials, ranging from polymers to proteins and even living cells, otherwise difficult to transfer unaltered in the form of thin films by other techniques. Furthermore, the use of laser light as transfer agent ensures purity of films and pulse-to-pulse deposition allows for an unprecedented control of film thickness at the nm level. This Special Issue is a collection of state-of-the art research papers and reviews in which the topics of interest are devoted to thin film synthesis by PLD and MAPLE, for numerous research and industry field applications, such as bio-active coatings for medical implants and hard, protective coatings for cutting and drilling tools withstanding high friction and elevated temperatures, sensors, solar cells, lithography, magnetic devices, energy-storage and conversion devices, controlled drug delivery and in situ microstructuring for boosting of surface properties.
Author: Valentina Dinca
Publisher: Elsevier
ISBN: 0128144025
Category : Technology & Engineering
Languages : en
Pages : 414
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Book Description
Functional Nanostructured Interfaces for Environmental and Biomedical Applications provides an overview on the characteristics of nanostructured interfaces and their processing technologies for a wide range of applications in the sensing, photocatalytic and bioengineering areas. The book focuses on the fundamentals of multifunctional nanostructured interfaces and their associated technologies, including versatile technologies, such as colloidal lithography, scanning probe techniques and laser nanostructuring, which can be used to obtain multifunctional 2D and 3D nanotextured interfaces. The book provides multidisciplinary chapters, summarizes the current status of the field, and covers important scientific and technological developments made over past decades. As such, it is an invaluable reference to those working in the design of novel nanostructured materials. Covers emerging applications of nanostructured interfaces, with a focus on sensing, bio-related and environmental applications Provides detailed and up-to-date overviews on the characteristics of nanostructured interfaces and their processing technologies, including materials from multifunctional graphene, to extremophile materials Includes information about versatile technologies, such as colloidal lithography, scanning probe techniques and laser nanostructuring, all of which can all be used to obtain multifunctional 2D and 3D nanotextured interfaces
Author: Bharat Pathak
Publisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 184
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Book Description
Author: Aline Rougier
Publisher: The Electrochemical Society
ISBN: 9781566774000
Category : Science
Languages : en
Pages : 326
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Book Description
Author: Artur Braun
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110794268
Category : Technology & Engineering
Languages : en
Pages : 765
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Book Description
This book is your graduate level entrance into battery, fuel cell and solar cell research at synchrotron x-ray sources and free electron lasers. Materials scientists find numerous examples for the combination of electrochemical experiments with simple and with highly complex x-ray scattering and spectroscopy methods. Physicists and chemists can link applied electrochemistry with fundamental concepts of condensed matter physics, physical chemistry and surface science.
Author: Robert Eason
Publisher: John Wiley & Sons
ISBN: 0470052112
Category : Science
Languages : en
Pages : 754
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Book Description
Edited by major contributors to the field, this text summarizes current or newly emerging pulsed laser deposition application areas. It spans the field of optical devices, electronic materials, sensors and actuators, biomaterials, and organic polymers. Every scientist, technologist and development engineer who has a need to grow and pattern, to apply and use thin film materials will regard this book as a must-have resource.
Author: Wan Shen
Publisher: Forschungszentrum Jülich
ISBN: 3893366083
Category :
Languages : en
Pages : 129
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Book Description
