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Showing 1 to 20 of 22 for “"Ultraviolet-visible spectroscopy"”.

  1. Utilization of Ultraviolet-Visible Spectroscopy and Rheology for Sludge Characterization and Monitoring

    Smyth, JordanCarleton University2018

    … to be used as monitoring technologies were ultraviolet/visible spectrophotometry and torque rheology. Effluent and filtrate absorbance measurements in the ultraviolet/visible range were successful in monitoring the progress of aerobic digestion. Torque rheology was not found to be sensitive …

    carleton Repository record

  2. Enhanced Structure and Crystallinity of Semiconducting Polymer Films Through Electrospray Deposition

    Rodriguez, Johan

    … grazing incidence x-ray diffraction (GIXRD) and ultraviolet visible spectroscopy. All results in this study are presented as a comparison to spin coated control process. The GIXRD results suggest that the electrospray process produces crystallites that have an orientation opposite of the …

    ucf

  3. Dispersion of graphene nanoplatelets in water with surfactant and reinforcement of mortar with graphene nanoplatelets

    Wotring, ErikUniversity of Illinois at Urbana-Champaign2015

    … size with dynamic light scattering (DLS). Ultraviolet-visible spectroscopy (UV-vis) measured the time evolution of the opacity of the suspension. Scanning electron microscopy (SEM) gave a qualitative set of micrographs of the particles taken out of the suspension. The team characterized the …

    uiuc Repository record

  4. Sequence Effects and Ligand Selectivity in Targeting Non-Canonical DNA Structures

    Rodriguez, MarcTexas State University2022

    … of Na+. We have embarked on a study utilizing ultraviolet-visible spectroscopy to determine how various Na+ cation concentrations affect thermal stability of TEL22 with and without the TMPyP4 ligand.

    texas-state Repository record

  5. Self-healing properties of water filtration membranes containing amphiphilic comb polymer

    Devereaux, Caitlin Albright, 1980-Massachusetts Institute of Technology2004

    … analysis is accomplished via x-ray photoelectron spectroscopy (XPS). Membrane samples are cleaned (in hydrogen peroxide or chromic-sulfuric acid (Chromerge)) and/or annealed (in 90⁰C deionized water), and their elemental surface composition and specific carbon binding environments are determined …

    mit Repository record

  6. Generation of tunable q-switched erbium-doped fiber laser based on graphite flakes saturable absorber

    Nik Mahmud, Nik Noor Haryatul EleenaUniversiti Tun Hussein Onn Malaysia2020

    … microscope (FESEM), energy dispersive X-ray spectroscopy (EDX) and ultraviolet visible spectroscopy (UV-VIS). The result showed that the carbon element on the SA has a very strong peak intensity. The two different EDF coefficient of 6.43 dB/m and 18.93 dB/m (EDF M-5 and EDF I-12) showed a …

    uthm Repository record

  7. Analysis of carbonaceous solid deposits from thermal stressing of FAMEs and FAME/diesel blends at different temperatures in a continuous flow reactor

    Mandavha, UyuenendiwannyiDepartment of Mechanical Engineering2015

    … from the stressed fuels were assessed using ultraviolet visible spectroscopy (UV-Vis) and electrospray ionisation-mass spectroscopy (ESI-MS) in order to provide further insight into the chemical processes preceding deposit formation. The test fuels stressed in this study were an EN 590 …

    cape-town Repository record

  8. Selective solar absorber materials : nanostructured surfaces via scalable synthesis

    Rubin, Julia G. (Julia Grace)Massachusetts Institute of Technology2017

    … optical properties were characterized using Ultraviolet-Visible Spectroscopy (UV-Vis) and Fourier Transform Infrared Spectroscopy (FTIR) and compared to optical properties of Pyromark®, the industry standard. Reflectance in the IR spectrum of CuO samples was found to increase after initial …

    mit Repository record

  9. The Optimization of Gold Coated Iron Nanoparticle Synthesis Methods

    Riggs, MarkTexas State University2014

    … methods such as scanning electron microscopy, ultraviolet-visible spectroscopy, and vibrating scanning magnetization. Improvements in particle size control and reduced use of expensive reagents were obtained. The nanoparticles produced did not meet the necessary size variance, particle …

    texas-state Repository record

  10. Investigations of highly conjugated macrocycles and polymers for aggregation and chemical sensing

    Boden, Britta NicoleUniversity of British Columbia2007

    … form good films through electropolymerization. Ultraviolet-visible spectroscopy confirmed extended conjugation in N,N '-phenylenebis(4-(2-thienyl)salicylideneimine).

    ubc Repository record

  11. Synthesis and characterization of conjugated materials with phosphorus

    Laughlin, Feng LiCase Western Reserve University School of Graduate Studies2013

    … via: multi-nuclear magnetic resonance spectroscopy (NMR), melting points (MP), elemental analyses (EA) or high resolution mass spectroscopy (HRMS), ultraviolet-visible spectroscopy (UV-vis) and fluorescence spectroscopy. Some materials were characterized by cyclic voltammetry …

    ohiolink Repository record

  12. Investigation of intermediate layer for Ag/Si metal-semiconductor contacts

    Bahri, Bibi ZulaikaUniversiti Tun Hussein Onn Malaysia2019

    … (AFM), four point probe (FPP) measurement and ultraviolet-visible spectroscopy (UV-Vis). The result indicates the RMS roughness was changed with the deposition time. The surface of Pt/Ag becomes rougher as deposition time increases. As deposition time increases, the resistivity shows some …

    uthm Repository record

  13. Structure-property relationships of dyes as applied to dye-sensitized solar cells

    Gong, YunUniversity of Cambridge2018

    … solar cells. Experimental methods, including ultraviolet-visible spectroscopy, fluorescence spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy are employed to study optical and electrochemical properties of dye molecules. Computational methods, including density …

    cambridge Repository record

  14. The behavior of uranium in the environment : bacterial reduction of an aqueous uranium species

    Lewis, Matthew R. (Matthew Robert), 1969-Massachusetts Institute of Technology2000

    … forms an insoluble compound known as uraninite. Ultraviolet/Visible Spectroscopy was used to analyze uranium ion complexion with several oxazine dyes that included Brilliant Cresyl Blue, Celestine Blue, and Gallomine Triethoiodide. Complexion and resultant color changes with U(VI) and U(IV) with …

    mit Repository record

  15. The Bio-Nano Interface: Investigating the Roles of Nanoparticle Morphology, Microstructure, Optoelectronic Properties, and Surface Chemistry for Biological Applications

    Karam, Liliana

    … large variety of QRs and characterized them with ultraviolet-visible spectroscopy, photoluminescence spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, and other techniques. I investigated the effects of QR energy-accepting …

    syracuse-diss Repository record

  16. New Chemistry For The Growth Of First-Row Transition Metal Films By Atomic Layer Deposition

    Klesko, Joseph Peter2016

    … force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), auger electron spectroscopy (AES), X-ray diffractometry (XRD), time-of-flight elastic recoil detection analysis (TOF-ERDA), ultraviolet-visible spectroscopy (UV-Vis), and four-point probe resistivity measurements.</p>

    wayne-thes Repository record

  17. Synthesis of coordination complexes and the use of X-ray diffraction data towards the development of refinement of occupancy of spherical atoms (ROSA), a new approach for the determination of atomic partial charges

    Keller, TaylorTemple University. Libraries2022

    … and characterized with X-ray crystallography, ultraviolet-visible spectroscopy (UV-Vis), infrared spectroscopy (IR), circular diochroism (CD), nuclear magnetic resonance spectroscopy (NMR), electron paramagnetic resonance spectroscopy (EPR), and elemental combustion analysis. A simple …

    temple Repository record

  18. Bioelectrochemical production of graphene oxide using bacteria as biocatalysts

    Nunez Hernandez, Diana Marcela, author, De Long, Susan, advisor, Kipper, Matt, committee member, Sambur, Justin, committee memberColorado State University. Libraries2019

    … of the nanomaterial product using various spectroscopy and microscopy techniques, and 3) analyzing the microbial communities present in the reactors and in the graphite anode biofilm. To quantify the BEGO and estimate production rates, different spectrophotometric and gravimetric methods …

    colostate Repository record

  19. Processing Approaches for Maintaining Multifunctionality in Advanced Thermoplastic Composites

    Anderson, JustinVirginia Tech2025

    … through dynamic mechanical analysis (DMA) and ultraviolet-visible spectroscopy (UV-VIS) respectively. Chapter 5 will address the issue of producing a multilayered filament while containing a functional particle to one of the layered matrices, and the effects of multiple processing methods on …

    vt Repository record

  20. Synthesis and characterization of N-alkylthiourea and N, N -dialkylthiourea complexes of Cu, Cd and Pb, and their use as single source precursors for the synthesis of metal sulfide nanoparticles

    Moloto, Makwena JusticeUniversity of Zululand2005

    … and X-ray crystallography. Infrared and NMR spectroscopy studies reveal the interaction between a metal and the ligands, thioureas, is mainly through bonding to sulfur. A series of cadmium(II) complexes with N-alkyl/aryl and N, N'-dialkyl/aryl thioureas (RNHCSNHR'; where R = R* = CH3, CH2CH3, …

    zulu Repository record

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