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  • Experimental Study of Nucleate Boiling Bubble Dynamics and Heat Transfer Enhancement on Printed Bi-functional Surfaces

    Creator:
    David, Michele
    Abstract:
    Boiling heat transfer is studied for its ability to dissipate high fluxes and achieve heat transfer coefficients two orders of magnitude greater than single-phase heat transfer systems. Heater surface enhancement with increased surface area, varied geometry, wettability contrast and micro/nano-structures can further enhance boiling heat transfer performance through bubble nucleation...
    Resource Type:
    Masters Thesis
    Full Text:
    Michele David for the degree of Master of Science in Chemical Engineering presented on December 6, 2016

  • Growth and characterization of zinc ferrite thin films for high frequency applications

    Creator:
    Hu, Jiqing
    Abstract:
    Ferrites have been used for various high frequency applications as bulk materials. These applications, however, are limited to large dimension devices. In this thesis, thin film ferrites were deposited from a low temperature solution-based deposition process that is suitable for micro-scale high frequency applications. The low temperature nature of this...
    Resource Type:
    Dissertation
    Full Text:
    Electrical Engineering and Computer Science Dean of the Graduate School I understand that my

  • Development of solution-based reaction processes for micro- and nano-structured semiconductors

    Creator:
    Lee, Doo-Hyoung
    Abstract:
    The focus of this study is to develop a general and low-cost solution-based process to fabricate micro- and nano-structured semiconductors that are suitable for electronics. This process uses simple metal halide precursors dissolved in a solvent (organic or aqueous) and is capable of forming uniform and continuous thin films via...
    Resource Type:
    Dissertation
    Full Text:
    Pinnularia sp. by a combination of chemical solution deposition of ZnO thin film and solid-solid reaction

  • Growth, Characterizations, and Applications of Patterned Nanostructured Thin Film

    Creator:
    Gao, Zhongwei
    Abstract:
    A unique microreactor-assisted nanomaterial synthesis and printing process was studied for the fabrication of patterned metal oxide nanostructured thin films. The process uses a continuous flow microreactor to control and generate a reactive chemical flux that was transported to a patterned microfluidic channel. The microreactor-assisted nanomaterial synthesis process can generate...
    Resource Type:
    Dissertation
    Full Text:
    homogenous formation of solid nanoparticles and reduce the concentration of reactive Zn(OH)2 (aq). This

  • Investigation of solution-based processes for functional metal oxides : printing, nanostructures, and applications

    Creator:
    Han, Seung-Yeol
    Abstract:
    The various solution-based processes, spin coating, inkjet printing, microreactor assisted nanoparticle deposition (MANDTM) and spin-successive ionic layer absorption and reaction (Spin-SILAR) were used to demonstrate thin film electronics and anti-reflective coatings. Several aspects of thin film transistors (TFTs) were tested including a range of temperatures, annealing atmosphere, and deposition methods....
    Resource Type:
    Dissertation
    Full Text:
    advantages. However, this technology opens a new and large avenue and is growing in range of applications

  • Growth, characterizations and applications of copper sulfide thin films by solution-based processes

    Creator:
    Vas-Umnuay, Paravee
    Abstract:
    Copper sulfides (Cu[subscript x]S) are compound semiconductor materials that exhibit considerable optical and electrical properties varying significantly as a function of the composition. Copper sulfide thin films can be used in many applications, such as solar control coatings, solar cells, photothermal conversion of solar energy, electroconductive coatings, and microwave shielding...
    Resource Type:
    Dissertation
    Full Text:
    reaction is thermally activated and precipitation of the solid phase occurs due to the supersaturation in

  • Electrochemical deposition of thin film CuGaSe₂ for photovoltaics

    Creator:
    Permanasari, Rina
    Abstract:
    CuGaSe₂/CuInSe₂ tandem junction solar cell is currently being pursued to be a low cost and high efficiency renewable energy source. A reported theoretical efficiency of 33.9% solar cells has been the motivation to fabricate CuGaSe₂ films in a simple and low cost method. Electrodeposition is a potentially suitable method to...
    Resource Type:
    Masters Thesis
    Full Text:
    . Literature reviews state that additives and levelers can improve the quality of the deposited films, however

  • Synthesis of Plasmonic-Enhanced Metal-Organic Framework Thin Films and their Infrared Sensing Application

    Creator:
    Ma, Guoheng
    Abstract:
    Transparent and electrically conductive metal oxide nanoparticles have attracted much attention, and can be used to improve the performance of solar cells, transparent electrode materials, and gas sensor technology. Specifically, indium tin oxide (ITO) nanocrystals (NCs) are potentially useful nanomaterials, having technological applications in enhanced sensitivity of optical spectroscopy due...
    Resource Type:
    Masters Thesis
    Full Text:
    OF THE THESIS OF Guoheng Ma for the degree of Master of Science in Chemical Engineering

  • Investigate Novel Inkjet Printing of High Performance Silica-based Nanostructured Anti-Reflection Coatings

    Creator:
    Holzgang, Harrison Robert
    Abstract:
    Anti-reflective coatings are applied to substrates to increase the transmittance of light in the visible range of wavelength 400 – 800 nm through the substrate by changing the refractive index at the surface and directing more light through the substrate rather than being reflected away. This project investigated the possibility...
    Resource Type:
    Honors College Thesis
    Full Text:
    anti reflective thin films of solid and hollow silica NPs as a novel coating technology compared to

  • A multiple solution, laboratory-scale delivery system and its applications

    Creator:
    Gilbuena, Debra M.
    Abstract:
    Researchers around the world use various solution-based deposition techniques to deposit thin films with multiple layers that typically require multiple rounds of deposition. Some such techniques include successive ionic layer adsorption and reaction (SILAR), and layer-by-layer (LBL) deposition. One of the main issues with deposition of these types of films...
    Resource Type:
    Masters Thesis
    Full Text:
    intern’s perception of his position at Oregon State University and his interaction with the author is

  • Synthesis of colloidal metal oxide nanocrystals and nanostructured surfaces using a continuous flow microreactor system and their applications in two-phase boiling heat transfer

    Creator:
    Choi, Chang-Ho
    Abstract:
    Metal oxide nanocrystals have attracted significant interests due to their unique chemical, physical, and electrical properties which depend on their size and structure. In this study, a continuous flow microreactor system was employed to synthesize metal oxide nanocrystals in aqueous solution. Assembly of nanocrystals is considered one of the most...
    Resource Type:
    Dissertation
    Full Text:
    ................................................................ 129 Figure 6.10. Wettability state of liquid drop: (a) Wenzel's state and (b) Cassie- Baxter state

  • Continuous flow synthesis of lead sulfide and copper indium diselenide nanocrystals

    Creator:
    Knapp, Michael W.
    Abstract:
    The use of size and shape tunable quantum confinement nanocrystals has many potential applications for use in semiconductors, optics and sensors. The synthesis of lead sulfide (PbS) and copper indium diselenide (CuInSe₂) nanoparticles are of particular interest for use in semiconductor, optoelectronics and bio-medical applications. The continuous synthesis of lead...
    Resource Type:
    Masters Thesis
    Full Text:
    electron with wavelength of energy and the subsequent emission to a lower energy state due to photons as

  • CdS nanocrystalline thin films deposited by the continuous microreactor-assisted solution deposition (MASD) process : growth mechanisms and film characterizations

    Creator:
    Su, Yu-Wei
    Abstract:
    The continuous microreactor-assisted solution deposition (MASD) process was used for the deposition of CdS thin films on fluorine-doped tin oxide (FTO) glass. The MASD system, including a T-junction micromixer and a microchannel heat exchanger is capable of isolating the homogeneous particle precipitation from the heterogeneous surface reaction. The results show...
    Resource Type:
    Dissertation
    Full Text:
    series data of (a) and (b) are from Dona et al. [31]. Solid lines are fitting curves of Kostoglue’s

  • Nanotechnology for solar module applications : zinc oxide nanostructures and anti-reflective coating modeling, deposition, analysis, and model fitting

    Creator:
    Han, Katherine M.
    Abstract:
    To become a competitor for fossil fuels such as coal, solar installations will need to be produced and installed at a price equal to or below grid parity. This price can be approached by either reducing the overall system cost or increasing system efficiency. The focus of this paper is...
    Resource Type:
    Dissertation
    Full Text:
    hollow NPs on top of a layer of solid NPs (middle), and sample #10 with a thicker layer of hollow NPs

  • Solution-based Chalcogenide Thin Film Deposition

    Creator:
    Pan, Changqing
    Abstract:
    As a group of promising semiconductor materials, metal chalcogenides in thin film form have been widely used in electronics and optoelectronics applications, such as solar cell devices and photon sensors. Unfortunately, the film size and product throughput are limited by the current vacuum-based thin film deposition techniques. Solution-based thin film...
    Resource Type:
    Dissertation
    Full Text:
    all the time of research in chemical engineering and material science. Dr. Ideker and Dr. Li provide

  • Fabrication of Biological Pigment Nanowires by Inkjet Printing

    Creator:
    Cao, Yu
    Abstract:
    Digital inkjet printing is developing quickly today because inkjet printing processes consume less energy and water and produce less waste discharge than traditional dyeing and other printing technologies. Inkjet printing provides more versatility and flexibility in terms of printing patterns and colors. Natural pigments are gaining more attention today as...
    Resource Type:
    Masters Thesis
    Full Text:
    low enough, then in steady state the fluid particles move parallel to it, and the speed of fluid

  • Fabrication and characterization of nanostructured surfaces for enhanced heat transfer

    Creator:
    Choi, Changho
    Abstract:
    This objective of this study is to investigate the capability of nanostructured surfaces on dissipating heat flux by performing pool boiling and convective flow boiling. The generation of ultra-high heat flux from high performance electric devices has motivated a number of investigations related to advanced heat transfer especially in two-phase...
    Resource Type:
    Masters Thesis
    Full Text:
    integration (VLSI) technology have advanced significantly in the past decades. With the trend of compact and

  • Synthesis of titanium dioxide nanorods using a continuous flow microreactor

    Creator:
    Yen, Wei-Liang
    Abstract:
    The primary goal of this thesis is to synthesize titanium dioxide nanorods using a continuous flow microreactor. Titania powder, one of the most important particulate materials is used for many purposes owing to its excellent optical properties of a high refractive index leading to high hiding power and whiteness of...
    Resource Type:
    Masters Thesis
    Full Text:
    condition. The combined effect of maximum friction between the interface of liquid/solid and the cohesion

  • Thermodynamics of Laser-Assisted Solution Combustion Synthesis of Yttrium Oxide

    Creator:
    Dhas, Jeffrey A.
    Abstract:
    To assess the conversion and embedment of yttrium nitrate to yttrium oxide using selective laser melting, a thermodynamic approach for laser power and scan speed predictions on surface temperature, recoil pressure, and resulting track morphology window are employed. Inkjet printing is used to deposit the liquid film of yttrium nitrate...
    Resource Type:
    Honors College Thesis
    Full Text:
    Honors Baccalaureate of Science in Chemical Engineering thesis of Jeffrey Arul Dhas, presented and

  • Investigation of low temperature solution-based deposition process for flexible electronics

    Creator:
    Chang, Yu-Jen
    Abstract:
    The critical contribution of this dissertation is to provide a better understanding of the fundamental Chemical Bath Deposition (CBD) growth kinetic and mechanism for the well known II-VI semiconductor CdS using the newly developed continuous flow microreactor. This continuous flow microreactor provides the temporal resolution to control the homogeneous reaction...
    Resource Type:
    Dissertation
    Full Text:
    . I have had a wonderful time here at Oregon State University, and I have lots of great memories

  • Formation of Cu₂ZnSnS₄ Thin Films via Reactive Sintering of Binary Metal-Sulfide Nanoparticles Using Intense Pulsed Light

    Creator:
    Zeng, Cheng
    Abstract:
    Copper zinc tin sulfide (CZTS) is a potential solar material for thin film solar cells according to its suitable band gap in the visible light range, high absorption coefficient, low toxicity, good photostability and relative earth abundance of component elements. However, the production cost of this solar thin film material...
    Resource Type:
    Masters Thesis
    Full Text:
    the degree of Master of Science in Chemical Engineering presented on November 30, 2018. Title

  • Growth, Characterization and Applications of Zinc Sulfide Thin Films by Solution-Based Processes

    Creator:
    Chiu, Dick
    Abstract:
    Zinc Sulfide (ZnS) thin film, with a wide band gap, has been used for many applications, such as buffer layer for CIGS solar cells, light emitting diodes and thin film electroluminescent devices. In this work, ZnS thin films were prepared using two different deposition processes. In the first method, ZnS...
    Resource Type:
    Dissertation
    Full Text:
    . Title: Growth, Characterization and Applications of Zinc Sulfide Thin Films by Solution- Based

  • Inkjet-Printed Metal Halide Semiconductors for Wearable Electronics

    Creator:
    Li, Shujie
    Abstract:
    There is an emerging interest in developing wearable electronics as a platform, which provides the flexibility of a wearable while maintaining its promising functionality as smart textiles. Metal-halide semiconductors are attractive materials with tunable optical and electrical properties. Researchers have widely studied and applied it for advanced photonics and optoelectronic...
    Resource Type:
    Dissertation
    Full Text:
    relation where 𝜎𝑠𝑣, 𝜎𝑠𝑙, and 𝜎𝑙𝑣 are the surface energies of the solid air, solid-liquid and

  • Characterizations of silicon-germanium nanocomposites fabricated by the marine diatom Nitzschia frustulum

    Creator:
    Liu, Shuhong
    Abstract:
    Marine diatoms are a class of microalgae that possess cell walls composed of silica nanoparticles. These organisms actively assimilate silicic acid Si(OH)4 from seawater, polymerize silicic acid to silica nanoparticles by a protein-mediated precipitation process, and then assemble the silica nanoparticles into intricate patterns that constitute the cell wall microarchitecture...
    Resource Type:
    Masters Thesis
    Full Text:
    University of Manitoba, Canada. "Most human technology can only do 3D by building layer after layer and so

  • Down-Shifting Nanoparticles and Anti-reflective Nanoparticles Co-Coating Applied on Top Glass Cover of Silicon-Based Solar Panels

    Creator:
    Jing, Qun
    Abstract:
    Photoluminescence (PL) materials have attracted a lot of attention in last several decades. Recently PL materials, which can convert low-efficiency Ultraviolet (UV) or Infrared (IR) light to high-efficiency visible light, have been widely applied in the research of improving conversion efficiency of solar cell. As one of the most common...
    Resource Type:
    Masters Thesis
    Full Text:
    : ground electronic state of Potoluminence materials. S1 and T1: Excited electronic states of

  • Synthesis of Mg-MOF-74 thin film on optical support and its potential application in gas sensing

    Creator:
    Sun, Hao
    Abstract:
    Mg-MOF-74 is one type of metal-organic frameworks (MOFs) that is widely known for its excellent CO2 uptake capacity. More intriguingly, it can be used to detect low levels of toxic gas such as CO2. Currently, most research into Mg-MOF-74 focuses on using the powder type as a CO2 absorbent because...
    Resource Type:
    Masters Thesis
    Full Text:
    particles in 2008. They used a solid mixture of H4DOBDC and Mg(NO3)2·6H2O, dissolved in the 15:1:1 (v/v/v

  • Low-temperature, Inkjet-printed p-Type Copper(I) Iodide-based Thin-Film Transistors

    Creator:
    Gorecki, Jenna Y.
    Abstract:
    Inkjet-printed p-type copper(I) iodide-based TFTs were successfully fabricated. As-printed copper(I) halide semiconductor films, such as CuI, CuBrI, and CuClI, were used as p-type active channel layers for TFTs. The entire process of the TFTs fabrication was maintained under 150 °C, which is compatible with flexible plastic substrates and transparent glass...
    Resource Type:
    Masters Thesis
    Full Text:
    ABSTRACT OF THE THESIS OF Jenna Y. Gorecki for the degree of Master of Science in Chemical Engineering

  • Low-Cost Light Trapping Layer via Melting Gel and Hot Embossing Technique

    Creator:
    Xu, Han
    Abstract:
    Light trapping plays a phenomenal role in enhancing light confinement and light absorption within the solar cells, thus increasing the optical efficiency of the cell. Different strategies are employed for trapping light photons within the cell. Methods used include a substrate or single layer texturing, light trapping coating, plasmonic gratings,...
    Resource Type:
    Masters Thesis
    Full Text:
    viscosity of the precursors increases, and the gel is formed as a result. The glassy state is appeared

  • Iron Chalcogenide-based Thin Films Fabricated by Inkjet Printing

    Creator:
    Fang, Zhen
    Abstract:
    Digital printing techniques offer several advantages in manufacturing electronics such as direct writing of materials, reduction of chemical waste, and scalability. In particular, printing can significantly simplify manufacturing processes by directly defining the channel area, the gate, and the source and drain contacts, allowing for lower costs and higher throughput...
    Resource Type:
    Masters Thesis
    Full Text:
    efforts in guiding my Master of Science study at Oregon State University. The past one and a half year