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Filtering by: Creator Sawyer, Clifton B. Remove constraint Creator: Sawyer, Clifton B. Advisor Remcho, Vincent T. Remove constraint Advisor: Remcho, Vincent T.

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  • Semiconductor Nanocrystals as Detection Components in Microfluidic Analytical Systems

    Creator:
    Pengpumkiat, Sumate
    Abstract:
    Miniaturized and portable microfluidic analytical platforms have been widely explored in the broad field of chemical analysis. The concept of microfluidics offer a number of important advantages, including low reagent consumption, low-cost detection, high sample throughput, and shorter analysis time. Semiconductor nanocrystals or quantum dots have been extensively utilized in...
    Resource Type:
    Dissertation
    Full Text:
    fluorophore. The CS-QDs were quenched with copper and deposited onto a glass microfiber filter (GF/B). The

  • Comprehensive, Low-Cost Wicking Microfluidic Analytical Devices for Clinical Diagnostics and Environmental Analysis

    Creator:
    Bandara, Gayan C.
    Abstract:
    Analytical techniques are utilized in a wide variety of applications. Traditionally, analytical measurements are achieved by trained personnel in a laboratory setting using expensive scientific instruments, which limits their applicability in resource-limited areas and point-of-care applications. Therefore, the concept of enabling these laboratory-based qualitative and quantitative assays in microfluidic device...
    Resource Type:
    Dissertation
    Full Text:
    (B) color value analysis approach was used in quantitative data acquisition. Another important

  • Comparative Studies of Batch and Continuous Processes for the Synthesis of Copper Nanoparticles

    Creator:
    Ramsing, Patrick E.
    Abstract:
    The cross over from batch nanoparticle synthesis to continuous synthesis processes is crucial to the commercialization of these materials. This project reports comparative studies of batch and continuous synthese of copper nanoparticles by the polyol method. Continuous synthesis of copper nanoparticles was done utilizing a stainless steel micro-mixer that yielded...
    Resource Type:
    Honors College Thesis
    Full Text:
    (a) and solid particles(b) filled using MS Paint for further size analysis using ImageJ

  • Magnetic particles for selective extraction of trace analytes in microfluidic devices

    Creator:
    Tennico, Yolanda H.
    Abstract:
    The development of micro total analysis systems (µTAS), also called “lab-on-a-chip”, or microfluidic analysis systems, is presented in this dissertation. Various research areas, covering subjects from magnetic particles synthesis to novel microchip fabrication techniques, are explored to develop a lab-on-a-chip system capable of performing magnetic bead-based bioassays. These devices are...
    Resource Type:
    Dissertation
    Full Text:
    process for fabricating microchip devices…………………18 1.6. A) The diagram of a hot embossing tool, B

  • Polylcaprolactone-Based Microfluidic Devices : Fabrication Methods and Applications in Low-Cost Analytical Devices

    Creator:
    Heist, Christopher A.
    Abstract:
    The overall concept of reducing laboratory operations to a scale that fits on a single microfluidic chip has been an attractive area of research over the last several decades. Despite a surge in research, few commercial success stories have been written. Lab-on-a-chip technologies have the capability to be cost effective...
    Resource Type:
    Dissertation
    Full Text:
    been available to me to complete my work. I would especially like to thank Theresa Sawyer and Dr

  • Electrospray Deposition of Discrete Nanoparticles: Studies on Pulsed-Field Electrospray and Analytical Applications

    Creator:
    Kremer, Matthew H.
    Abstract:
    Electrospinning and electrospray are both nano-scale material fabrication techniques, based on related phenomena of electrically charged fluid spray from a droplet of liquid. Material is dissolved in liquid, then a spray is generated by applying a high voltage, creating an electric field, between the fluid dispensing capillary and a grounded...
    Resource Type:
    Masters Thesis
    Full Text:
    assistance in obtaining biological samples. Thank you to Pete Eschbach and Teresa Sawyer of the OSU

  • A photoactivable microfluidic device for heavy metal ion extraction

    Creator:
    Nammoonnoy, Jintana
    Abstract:
    The development of microfluidic devices for heavy metal extraction is presented in this dissertation. Various research areas, covering subjects from photochromic compound syntheses to microchip fabrication techniques are explored to develop microfluidic devices capable of extracting heavy metal ions from drinking water. Through integration of the beneficial characteristics of both...
    Resource Type:
    Dissertation
    Full Text:
    light of = 525 nm. (a) before irradiation; (b) after irradiation with UV light for 5 min; (c) after

  • Carbon Nanodots as Biolabels for Fluorescence Immunoassays

    Creator:
    Wu, Yuanyuan
    Abstract:
    There has been a tremendous growth in interest in carbon nanodots (C-dots) in the past several years. As a nascent nanomaterial, C-dots have shown great promise in applications that benefit from their superior water dispersibility, low toxicity, non-blinking fluorescent output, chemical and biological compatibility, ease of functionalization and resistance to...
    Resource Type:
    Dissertation
    Full Text:
    imager; Teresa Sawyer and Dr. Peter Eschbach for their trainings and help on SEM and TEM; Dr. Bracha

  • Functionalization of carbon nanotubes for effective biosensing and potential biomedical applications

    Creator:
    Adenuga, Adeniyi A.
    Abstract:
    Since their discovery in the 1990s, the great potential of carbon nanotubes (CNTs) has made them a focus of many research endeavors, including their application as components of biosensors. The inherent chemical "inertness" of CNTs makes their application to biosensing a challenge. It is necessary to "decorate" their surfaces to...
    Resource Type:
    Dissertation
    Full Text:
    his lab. I wish to thank the staff of the Electron Microscopy lab, College of Science: Teresa Sawyer