Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Other

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type

Articles 1711 - 1740 of 2904

Full-Text Articles in Engineering

Design, Fabrication And Test Of Surface Tension-Driven Microboats And Thermally Oscillatory Bubble-Propelled Microsubmarines, Lei Qiao Jan 2013

Design, Fabrication And Test Of Surface Tension-Driven Microboats And Thermally Oscillatory Bubble-Propelled Microsubmarines, Lei Qiao

Mechanical and Aerospace Engineering Dissertations - Archive

In this work, we develop microboats and microsubmarines, which are capable of moving on and under water, respectively. The microboat is propelled due to the difference between surface tensions around stern and bow. This difference is generated by releasing a liquid with lower surface tension than water from the stern. We explore both horizontal and vertical motions of the microboats through a combination of experimental and theoretical investigations. It has a length of 8 mm and weight of 20 mg with the highest speed of 25 cm/s and travel distance of 85 cm. Moreover, we design, fabricate and test microboats …

Go to article

Effect Of Suction On Dynamic Properties Of Unsaturated Soils At Mid- To High-Shear Strain Amplitudes, Alejandro Hernan Pino Bravo Jan 2013

Effect Of Suction On Dynamic Properties Of Unsaturated Soils At Mid- To High-Shear Strain Amplitudes, Alejandro Hernan Pino Bravo

Civil Engineering Theses - Archive

This paper presents the results from an experimental study that has been designed to assess the effect of the suction and net mean stress on the dynamic properties of poorly graded sand with silt subjected to small- to mid-shear strains. The practical implication of this study includes determining the effect on soil stiffness properties of increased matric suction (transpiration of water) at different net mean stresses (or depths) in the field. The engineering analysis of earth structures subjected to static and non-static loading under unsaturated conditions requires knowing the relevant parameters of the soil, such as shear wave velocity, shear …

Go to article

Lrfd Pullout Resistance Factor Calibration For Soil Nails Incorporating Survival Analysis And Plaxis 2d, Brett Devries Jan 2013

Lrfd Pullout Resistance Factor Calibration For Soil Nails Incorporating Survival Analysis And Plaxis 2d, Brett Devries

Civil Engineering Theses - Archive

The use of soil nail walls (SNWs) in the United States has increased since their introduction in the mid-1970's, to where currently the analysis, design and construction are commonly performed (Lazarte, 2011). These SNW designs were mostly based on ASD methods and LRFD-based methodologies were lacking until the 1998 FHWA manual on SNW design (Byrne, Cotton, Porterfield, Wolschlag and Ueblacker, 1998), which provided uncalibrated resistance factors developed from ASD safety factors. As a result, little improvement was made toward a more efficient design, until fully calibrated LRFD pullout resistance factors were provided in the NCHRP Report 701 (Lazarte, 2011). These …

Go to article

Enhancing Selective Decomposition Of Ibuprofen Onto Porous Tio₂ Nanoparticles, Abolfazl Zakersalehi Jan 2013

Enhancing Selective Decomposition Of Ibuprofen Onto Porous Tio₂ Nanoparticles, Abolfazl Zakersalehi

Civil Engineering Theses - Archive

Advanced oxidation technologies have gained tremendous attention for water treatment purposes after demonstration of insufficient efficiency of conventional systems for removal of many emerging chemicals of concern. Among AOTs, a TiO2-UV system is one of the most promising approaches due to its green properties and its effectiveness in generation of extremely oxidizing species such as hydroxyl radicals. However it has been demonstrated that non-selectivity of HRs in decomposition of organic compounds results in parallel decomposing of naturally abundant organic matter (NOM) along with toxic target contaminant, which significantly decreases the decomposition rate of target contaminants. Despite a great amount of …

Go to article

Investigations To Develop Field Stabilization Methods To Mitigate Surficial Slope Failures, Minh Le Jan 2013

Investigations To Develop Field Stabilization Methods To Mitigate Surficial Slope Failures, Minh Le

Civil Engineering Dissertations - Archive

Surficial slope failures induced by rainfall have been studied for many years. Current research supported by The United States Army Corps of Engineers (USACE) is undertaken at the University of Texas at Arlington on two sites, Joe Pool Dam and Grapevine Dam located in the Fort Worth district. The objective of the project is to find the best stabilization method to mitigate those failures. A testing area of 5 sections (one control and four treated) was established on each site with used admixtures of 20% compost, 4% lime with 0.30% polypropylene fibers, 8% lime with 0.15% polypropylene fibers, and 8% …

Go to article

Hydraulic Performance Evaluation Of Different Recirculation Systems For Elr / Bioreactor Landfills, Shahed R. Manzur Jan 2013

Hydraulic Performance Evaluation Of Different Recirculation Systems For Elr / Bioreactor Landfills, Shahed R. Manzur

Civil Engineering Dissertations - Archive

The major aspect of bioreactor landfill is the addition of liquid and recirculation of collected leachate back into the waste mass through the subsurface Leachate Recirculation System (LRS). The leachate recirculation system consists of the perforated recirculation pipes placed inside horizontal trenches and the permeable beds with different orientation. The application of high permeability material (shredded tire chips, broken glass, pea gravel) in landfills is an emerging technology to distribute the moisture over a wider area in a shorter period of time. Horizontal or vertical perforated pipes are installed in bioreactor landfills as LRS with an expectation of uniform moisture …

Go to article

Large Diameter Steel Pipe Field Test Using Controlled Low Strength Material And Staged Construction Modeling Using 3-D Nonlinear Finite Element Analysis, Franciele Bellaver Jan 2013

Large Diameter Steel Pipe Field Test Using Controlled Low Strength Material And Staged Construction Modeling Using 3-D Nonlinear Finite Element Analysis, Franciele Bellaver

Civil Engineering Theses - Archive

Using finite element methods and field tests, an extensive study on selected steel pipes is devised for the Integrated Pipeline Project in Dallas-Fort Worth, Texas. The project integrates Tarrant Regional Water District (TRWD) existing pipelines to the Dallas system along 150 miles. Field test of buried pipes, monitoring the pipe in different trench conditions is extremely valuable in predicting the displacement of the pipe during construction stages and during its lifetime. The field instrumentation monitors the circular displacements and strains of a buried steel pipe with an outside diameter (O.D.) of 84 in. and 0.375 in. thickness in three different …

Go to article

Determination Of Safe Roadway Buffer Width To Protect Human Health From No2 Exposure: A Case Study For Grand Prairie, Tx, Hetal Bhatt, Melanie L. Sattler, Stephen P. Mattingly Jan 2013

Determination Of Safe Roadway Buffer Width To Protect Human Health From No2 Exposure: A Case Study For Grand Prairie, Tx, Hetal Bhatt, Melanie L. Sattler, Stephen P. Mattingly

Civil Engineering Faculty Publications - Archive

No abstract provided.

Go to article

Sustainable Slope Stabilization Using Recycled Plastic Pin In Texas, Mohammad Sadik Khan Jan 2013

Sustainable Slope Stabilization Using Recycled Plastic Pin In Texas, Mohammad Sadik Khan

Civil Engineering Dissertations - Archive

Shallow slope failures are predominant in the North Texas area and pose significant maintenance problems for the Texas Department of Transportation (TxDOT). As a cost effective alternative, the Recycled Plastic Pin (RPP) can be utilized to stabilize the shallow slope failure. RPP are fabricated from recycled plastics and waste materials (i.e. polymers, sawdust, and fly ash). It is a lightweight material and less susceptible to chemical and biological degradation than alternative reinforcing element. RPPs are driven into the slope face, which provide additional resistance along the slip surface and increase the factor of safety. The current study summarized the remediation …

Go to article

Global Optimization Of Nonconvex Piecewise Linear Regression Splines, Nadia Maria Martinez Cepeda Jan 2013

Global Optimization Of Nonconvex Piecewise Linear Regression Splines, Nadia Maria Martinez Cepeda

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Global optimization has been applied to a wide variety of science and engineering design problems. Although numerous global optimization techniques have been developed and studied for decades, when used for complex systems such as the design of an aircraft or an automobile, the results are impractical or not completely satisfactory. One of the main drawbacks is the computational CPU time required to solve these problems. The majority of design problems require a significant number of experiments or simulations in order to find a globally best solution; however a single simulation can take between seconds and days to finish. One way …

Go to article

Parametric Cost Estimation Model For Microchannel Bonding Process Based On Activity Based Costing, Panita Suebvisai Jan 2013

Parametric Cost Estimation Model For Microchannel Bonding Process Based On Activity Based Costing, Panita Suebvisai

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

The microchannel bonding process was developed to decrease product size and improve product performance. As the microchannel bonding process has moved from research to industrial manufacturing, it has become increasingly important to create a model to more accurately estimate the costs associated with this process. However, due to problems in project planning and limitations in funding, most microchannel bonding projects appear to have schedule slips and cost overruns. This dissertation presents a cost estimation model that links activity-based costing with parametric cost estimation. A parametric cost model has been designed to improve decision making in the microchannel bonding process, specifically …

Go to article

Nano-Morphology Of Polymer Bulk Herojunctions Studied By Time-Resolved Synchrotron X-Ray Scattering, Soo Kim Jan 2013

Nano-Morphology Of Polymer Bulk Herojunctions Studied By Time-Resolved Synchrotron X-Ray Scattering, Soo Kim

Material Science and Engineering Dissertations - Archive

This study investigates the phase transformation of an active layer in organic photovoltaics (OPV) during film deposition and post thermal treatment as well as effects of phase transformation on OPV performance. For this purpose, small - and wide angle X-ray scattering technique (SAXS and WAXS) was applied to examine the phase separation mechanism at relevant fabrication condition of the highest OPV device performance. The poly(3-alkylthiophene)/[6,6]-phenyl-C61 butyric acid methylester (P3AT/PCBM) blend sample was employed in order to study phase transformation of the active layer systemically.Our exploration with SAXS and WAXS technique found that the polarity of the substrate, a solubility, and …

Go to article

Fabrication And Characterization Of Barium Titanate Thin Film On Polycrystalline Nickel Substrate, Parisa Sahebi Jan 2013

Fabrication And Characterization Of Barium Titanate Thin Film On Polycrystalline Nickel Substrate, Parisa Sahebi

Material Science and Engineering Theses - Archive

Ferroelectric BaTiO₃(BTO) thin films were deposited on polycrystalline nickel disks and silicon wafer substrates by rf magnetron sputtering. Nickel oxide (NiO) and nanocrystalline nickel (nc-Ni) layers were used as interfacial buffer layers. Microstructural studies with X-ray diffraction and transmission electron microscopy reveal that the BTO films deposited at temperatures lower than 700℃ have an amorphous structure. However, the BTO films sputtered at temperatures higher than 700℃ are partially crystalline. BTO films have a good and continuous interface with both interfacial layers with no interdiffusion or reaction with the substrates. In the case of BTO deposition with nc-Ni interlayer at higher …

Go to article

Investigation Of Nanoparticle Delivery To Cancer Cells By Conjugation With Various Targeting Moieties, Leila Hossein Rashidi Jan 2013

Investigation Of Nanoparticle Delivery To Cancer Cells By Conjugation With Various Targeting Moieties, Leila Hossein Rashidi

Bioengineering Theses - Archive

Recently, mapping and profiling of specific tumor biomarkers characterizing cancer cells, followed by understanding of signal cascades involved in the pathogenesis of tumors (targeted therapy), as well as diagnosis in early stages, have become promising topics in cancer research. Since, the most considerable limitations of conventional therapies and diagnostic modalities are associated with nonspecific targeting; designing intelligent new anti-cancer nanocarries improved by targeting biomolecules could enhance therapeutic efficiencies as well as diagnosis in early stage of cancer. Active targeting which is based on the surface accessibility and the high level of expression of specific cancer antigens has attracted much attention …

Go to article

Effect Of Body Mass Index On The Biomechanical Properties Of Anterior Vaginal Wall Tissue Of Prolapsed Patients, Sandra Gabriela Ochoa Lopez Jan 2013

Effect Of Body Mass Index On The Biomechanical Properties Of Anterior Vaginal Wall Tissue Of Prolapsed Patients, Sandra Gabriela Ochoa Lopez

Bioengineering Theses - Archive

Anterior Vaginal Wall (AVW) prolapse is a bothersome condition that affects thousands of women. Its onset and progression is not well understood but is thought to be multifactorial. Biomechanical properties of AVW tissue from prolapsed patients have been measured in-vitro using excised tissue specimens with great variability found in results, possibly from differences in tissue preparation, setting, preservation time, temperature, hydration, etc. In-vivo test using a BTC-2000TM cutometer-like device has recently been developed that measures the tissue uplift under suction pressure load. In this study, a systematical analysis of biomechanical property measurements from AVW tissues was done, including both in-vitro …

Go to article

Measurement Of Transverse Relaxation Times Of Cerebral Metabolites In Brain Tumors, Akshay Madan Jan 2013

Measurement Of Transverse Relaxation Times Of Cerebral Metabolites In Brain Tumors, Akshay Madan

Bioengineering Theses - Archive

Proton (¹H) magnetic resonance spectroscopy (MRS) provides a non-invasive means of assessing metabolite concentration for a range of biologically important cerebral compounds in vivo. To extract quantitative information, additional data regarding proton spin relaxation phenomena is critical. Transverse relaxation times (T₂) of cellular metabolites depend on the local molecular environment in which they reside. Several neurological diseases alter the molecular environment, which may be reflected in the changes of the T₂ relaxation times. Therefore alterations in T₂ in tumors may provide important information about the local environment and a potential non-invasive diagnostic tool. Thirty-seven adult patients with gliomas and 11 …

Go to article

Microfluidic Chip-Based Fabrication Of Hollow Alginate Microfiber For Enzyme Entrapment And Reaction, Uyen Hoang Thao Pham Jan 2013

Microfluidic Chip-Based Fabrication Of Hollow Alginate Microfiber For Enzyme Entrapment And Reaction, Uyen Hoang Thao Pham

Bioengineering Theses - Archive

This thesis demonstrates a simple process to generate alginate hollow microfibers by using a non-lithographic PDMS microfluidic device. The microfluidic device was fabricated by a novel template method in a wet lab without the support of any conventional lithography techniques. The relationships of the flow rate and the diameter of hollow alginate fibers were characterized. It was found that the outer diameter of the alginate hollow fiber was independent of the flow rate, but the core flow and sheath flow played an important role to control the internal diameter and the wall thickness of the alginate hollow microfiber. At a …

Go to article

Design, Fabrication And Evaluation Of A Novel Microfluidic Based In Vitro Cell Migration Assay, Sai Sirisha Dhavala Jan 2013

Design, Fabrication And Evaluation Of A Novel Microfluidic Based In Vitro Cell Migration Assay, Sai Sirisha Dhavala

Bioengineering Theses - Archive

Microfabrication and microfluidic devices have been recognized as potential platforms for cell-based and drug screening studies. Human glioblastoma multiforme (hGBM) cells migrate inside the central nervous system (CNS) in narrow space constrictions and rarely metastasize through bloodstream. Hence, microfluidic devices consisting of narrow channels are considered as suitable models to study cell migration in vitro. Further the migratory capability of each individual cell could be easily obtained and quantified using such system. This effort presents the design and development of an alternative microfluidic system that provides an integrated array of channels for screening multiple drugs simultaneously. This system is an …

Go to article

Reliable Frontal Cortex Activity For An Oral Stroop Task Using Functional Near Infrared Spectroscopy, Matthew Allen Cloud Jan 2013

Reliable Frontal Cortex Activity For An Oral Stroop Task Using Functional Near Infrared Spectroscopy, Matthew Allen Cloud

Bioengineering Theses - Archive

Analysis tools such as HomER and NIRS-SPM for functional Near-Infrared systems are commercially or freely available; however, they are difficult for clinicians to use as an assessment tool. One barrier to their use is the reliability of a given functional test. Intraclass correlation coefficients (ICC) provide a measure of group and individual reliability. NIRS-SPM was extended with ICC to assess a two part modified Stroop task. The protocol was repeated once every two weeks over a period of one month. Changes in neural activity attributed to inhibition of distraction, show significant covariance to the protocol with moderate to strong reliability …

Go to article

Metacom: Automated Data Processing And Analysis Of Metagenomic Community Sequences, Cody A. Tramp, Charles D. Miller Jan 2013

Metacom: Automated Data Processing And Analysis Of Metagenomic Community Sequences, Cody A. Tramp, Charles D. Miller

Browse all Datasets

Advances in next generation sequencing technology have allowed metagenomic researchers to study the composition of bacterial communities through analysis of the vast numbers of sequence reads that these technologies generate. It is not feasible to analyze and interpret this large amount of data manually and individual research groups must create automated scripts and programs to analyze this data. Here, we present MetaCom, a program that offers a common set of analysis and organizational tools that can be used by research groups in the analysis of environmental samples. MetaCom is an open-source software tool that can process next generation sequencing output, …

Go to article

Optimized Estimates Based On Multiple Sensor Configuration Knowledge, Roochi Mishra Jan 2013

Optimized Estimates Based On Multiple Sensor Configuration Knowledge, Roochi Mishra

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

There has been an increase in the usage of sensor technology as they are adaptable for use in different environments, many of which are hostile to direct human observation, such as regions affected by land mines or forest fires. The sensors used to monitor developing situations are small inexpensive computing devices with limited processing capabilities, limited power supply and may be destroyed in the event that they are monitoring, without suffering a great financial cost. Also, since these devices are inexpensive, multiple sensors can be deployed for the same application where the sensors are placed or attached to a mobile …

Go to article

Mathematical Programming Approaches For Land Use Planning That Limits Urban Sprawl, Piyush Kumar Jan 2013

Mathematical Programming Approaches For Land Use Planning That Limits Urban Sprawl, Piyush Kumar

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Sprawl has a detrimental effect on quality of life and the environment. For example, it increases our dependence on vehicles for daily tasks. This leads to increased vehicular pollution. It also increases traffic, which results in people spending more time on the road. With dwindling resources and increasing population, it becomes necessary that we manage sprawl. Ewing et al. defined factors to measure sprawl in the present urban structure. The measures are divided into four broad categories, which are density factors, mixed use factors, streets factor, and centers factors. These measures address various aspects that contribute to sprawl. For example, …

Go to article

Variants Of Multivariate Adaptive Regression Splines (Mars): Convex Vs. Non-Convex, Piecewise-Linear Vs. Smooth And Sequential Algorithms., Diana Luisa Martinez Cepeda Jan 2013

Variants Of Multivariate Adaptive Regression Splines (Mars): Convex Vs. Non-Convex, Piecewise-Linear Vs. Smooth And Sequential Algorithms., Diana Luisa Martinez Cepeda

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Multivariate Adaptive Regression Splines (MARS) is a statistical modeling method used to represent high-dimensional data with interactions. It uses different algorithms to select the terms to be included in the approximation model that best represent the data. In addition, it performs a variable selection, therefore the most significant predictors are shown in the final model. Design and analysis of computer experiments (DACE) is a statistical technique for creating approximations (called metamodels) of computer models. For optimization problems in which there is an unknown function that must be approximated, DACE approach could be applied. In stochastic dynamic programming (SDP) for example, …

Go to article

A Model Characterization Of The Texas Healthcare Facilities, Shernette R. Kydd Jan 2013

A Model Characterization Of The Texas Healthcare Facilities, Shernette R. Kydd

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

The Patient Protect and Affordable Care Act of 2010 became a law on March 23, 2010. This healthcare act, according to the authors, is designed to improve health services by targeting various facets of the industry: hospitals, private physicians, insurance companies and the drug industry - to name a few. It impacts many people, both directly and indirectly. The effects of this new law will most likely not immediately be recognized, although is it possible for "pockets: of success stories.The administration of Medicare is an area of interest primarily because of the finances involved. Today, there are many waste streams …

Go to article

On The Concept Of Earthquake Resistant Hybrid Steel Frames, Seyed Mohammad Razavi Jan 2013

On The Concept Of Earthquake Resistant Hybrid Steel Frames, Seyed Mohammad Razavi

Civil Engineering Dissertations - Archive

The concept of hybrid steel frame system is presented in which mixtures of fully-rigid and semi-rigid steel connections are used in the 3-, 9- and 20-story SAC frames. Several different patterns and locations of semi-rigid connection replacements within the frame are examined in order to identify hybrid frames with the best seismic performance. The effective connection stiffness is identified by performing a parametric study on the initial stiffness of the semi-rigid connections. Then, the cyclic behavior of the connections with the most effective stiffness is obtained using nonlinear finite element analysis. Inelastic dynamic analyses are conducted on the proposed selected …

Go to article

An Evaluation Of Models Of Bare Soil Evaporation Formulated With Different Land Surface Boundary Conditions And Assumptions, Kathleen M. Smits, Viet V. Ngo, Abdullah Cihan, Toshihiro Sakaki, Tissa H. Illangasekare Dec 2012

An Evaluation Of Models Of Bare Soil Evaporation Formulated With Different Land Surface Boundary Conditions And Assumptions, Kathleen M. Smits, Viet V. Ngo, Abdullah Cihan, Toshihiro Sakaki, Tissa H. Illangasekare

Civil Engineering Faculty Publications - Archive

Bare soil evaporation is a key process for water exchange between the land and the atmosphere and an important component of the water balance. However, there is no agreement on the best modeling methodology to determine evaporation under different atmospheric boundary conditions. Also, there is a lack of directly measured soil evaporation data for model validation to compare these methods to establish the validity of their mathematical formulations. Thus, a need exists to systematically compare evaporation estimates using existing methods to experimental observations. The goal of this work is to test different conceptual and mathematical formulations that are used to …

Go to article

Investigation On Thermo-Mechanical Instability Of Porous Low Dielectric Constant Materials, Emil Hyunbae Zin Dec 2012

Investigation On Thermo-Mechanical Instability Of Porous Low Dielectric Constant Materials, Emil Hyunbae Zin

Material Science and Engineering Dissertations - Archive

This study investigates the structural stability of porous low dielectric constant materials (PLK) under thermal and mechanical load and the influence of contributing factors including porosity as intrinsic factor and plasma damage and moisture absorption as extrinsic factors on thermo-mechanical instability of PLK in advanced Cu/PLK interconnects. For this purpose, a ball indentation creep test technique was developed to examine the thermal and mechanical instability of PLK at relevant load and temperature conditions in the interconnect structure. Our exploration with the ball indentation creep test found that PLK films plastically deforms with time, indicating that viscoplastic deformation does occur under …

Go to article

First-Principles Studies On N-Type And P-Type Doping In Cuprous Oxide, Qiong Bai Dec 2012

First-Principles Studies On N-Type And P-Type Doping In Cuprous Oxide, Qiong Bai

Material Science and Engineering Dissertations - Archive

We have performed studies on n-type and p-type cuprous oxide with and without doping by first principles methods. Generalized Gradient Approximation (GGA) is used for the geometry optimization. The total energy and the final electronic structure calculations are conducted using the nonlocal screened Heyd-Scuseria-Ernzerhof (HSE) hybrid density functionals approach for cuprous oxide. The HSE hybrid density functionals overcome the shortcoming of GGA, which gives a much reliable value of the band gap. The formation energies of native point defects in undoped cuprous oxide have been studied by HSE hybrid functional theory in two conditions, which are vacuum based condition and …

Go to article

Properties Of Concrete With Tire Derived Aggregate And Crumb Rubber As A Ligthweight Substitute For Mineral Aggregates In The Concrete Mix, Gideon Momanyi Siringi Dec 2012

Properties Of Concrete With Tire Derived Aggregate And Crumb Rubber As A Ligthweight Substitute For Mineral Aggregates In The Concrete Mix, Gideon Momanyi Siringi

Material Science and Engineering Dissertations - Archive

Scrap tires continue to be a nuisance to the environment and this research proposes one way of recycling them as a lightweight aggregate which can substitute for mineral aggregates in concrete. Aggregates derived from scrap tires are often referred to as Tire Derived Aggregate (TDA). First, the focus is how much mineral aggregate can be replaced by these waste tires and how the properties of concrete are affected with the introduction of rubber. This is being mindful of the fact that for a new material to be acceptable as an engineering material, its properties and behavior has to be well …

Go to article

Growth Mechanism And Interface Effects On Microstructure Of Perovskite-Type Barium Titanate-Based Epitaxial Films, Jie He Dec 2012

Growth Mechanism And Interface Effects On Microstructure Of Perovskite-Type Barium Titanate-Based Epitaxial Films, Jie He

Material Science and Engineering Dissertations - Archive

This work was motivated and focused on the growth mechanism, microstructures and interfaces of barium titanate, BaTiO3 (BTO), based epitaxial thin films. Transimission electron microscopy (TEM), high resolution TEM (HRTEM), electron diffraction (ED) have been mainly employed in this study for microstructure investigations of BTO-based epitaxial thin films with the assistance of other materials characterization methods, such as X-ray diffraction (XRD), atomic force microscopy (AFM), Nanoindentation testing, etc. As a basic studying model, epitaxial BTO films were first deposited on the (001) MgO substrate using RF magnetron sputtering to provide fundamental knowledge of the film growth for BTO based thin …

Go to article

First Prev Next Last