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Filtering by: Creator Chen, H. Remove constraint Creator: Chen, H. Advisor Keszler, Douglas A. Remove constraint Advisor: Keszler, Douglas A.

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  • Reaction Pathways of Oxo-Hydroxo Group 5 Clusters to Metal Oxide Thin Films

    Creator:
    Mansergh, Ryan H.
    Abstract:
    Oxo-hydroxo Group 5 metal clusters are an untapped resource to study and advance aqueous solution processing of metal oxide thin films. The tetramethylammonium (TMA) hexatantalate salt (TMA6[H2Ta6O19]) yields dense Ta2O5 films (~95% of the bulk ß-Ta2O5 density) with atomically smooth surfaces (<4 Å root mean square surface roughness). This same...
    Resource Type:
    Dissertation
    Full Text:
    .; Chang, S.-J.; Chen, J.-F.; Sun, S. C.; Liu, C. H.; Liaw, U. H. Effects of O2 Thermal Annealing on the

  • New, complex group 13 borates : synthesis, structures, and properties

    Creator:
    Chang, Ki-Seog
    Resource Type:
    Dissertation
    Full Text:
    , Prof. James H. Kruger, Prof. Michael M. Lemer, Prof. Kevin P. Gable, Prof. Kelly K. Falkner, and Prof

  • New luminescent materials and high-performance solution-processed oxide thin films

    Creator:
    Jiang, Kai
    Abstract:
    Crystals of an incongruent-melting compound, Ba₃MgSi₂O₈, were grown by the flux method and its structure was determined by single crystal X-ray diffraction methods. Ba₃MgSi₂O₈ crystallizes in trigonal space group P-3[bar]m1 with a = 5.6123(3) Å, c = 7.2667(9) Å and Z = 1. Eu²⁺ ions prefer one crystallographic Ba site...
    Resource Type:
    Dissertation
    Full Text:
    air at 350 °C for 1 h. The two equations in the plot were generated by linearly fitting the data

  • Chemistry of High-Resolution Organotin Patterning Materials

    Creator:
    Kenane, Nizan
    Abstract:
    Organotin clusters have attracted notable attention for use as inorganic photoresists. This dissertation discerns dimeric and dodecameric organotin clusters, [(n-C₄H₉Sn)(OH)(H₂O)Cl₂]₂ (Sn₂) and [(n-C₄H₉Sn)₁₂O₁₄ (OH)₆ ]+ (Sn₁₂), both of which are stable hydrolysis and condensation products of n-C₄H₉SnCl₃. This work identifies Sn₂ as a superior precursor choice for solution deposition of...
    Resource Type:
    Dissertation
    Full Text:
    green, and C and H in grey. We synthesize pure crystals of this dimer by slow hydrolysis of n

  • Copper and iron chalcogenides for efficient solar absorption

    Creator:
    Platt, Heather A. S.
    Abstract:
    This dissertation outlines two approaches for improving the efficiency and reducing the cost of photovoltaic energy generation. First, the structures of known binary copper and iron compounds are used to choose the promising compositions Fe₂XS₄ (X = Si, Ge), Cu₃TaQ₄ (Q = Se, Te), and BaCuQ'F (Q' = S, Se,...
    Resource Type:
    Dissertation
    Full Text:
    ........................ 109 6.2 XRD data collected from BaCuSeF prepared with and without the 2 h anneal under flowing Ar

  • Aqueous niobium chemistry at low pH : new precursors for oxide thin films

    Creator:
    Park, Deok-Hie
    Abstract:
    Phosphate and peroxide stabilize new oxo-hydroxo niobium clusters in water at low pH. The clusters open a new chapter in aqueous niobium chemistry under acidic conditions. The clusters also produce atomically smooth, amorphous niobium oxide phosphate (NbPOx) thin films. Reaction pathways from cluster solutions to amorphous niobium oxide phosphate solids...
    Resource Type:
    Dissertation
    Full Text:
    function of pH, phosphate concentration, and counterion (H+ and TMA+) were investigated with electrospray

  • A contribution to the development of wide band-gap nonlinear optical and laser materials

    Creator:
    Stone-Sundberg, Jennifer L.
    Abstract:
    The primary focus of this work is on examining structure-property relationships of interest for high-power nonlinear optical and laser crystals. An intuitive and simply illustrated method for assessing the nonlinear optical potential of structurally characterized noncentrosymmetric materials is introduced. This method is applied to materials including common quartz and tourmaline...
    Resource Type:
    Dissertation
    Full Text:
    (h) with cell parameters a= 9.805(3), c= 7.980(2) A, V= 664.4(2) A3 and Z=3. This material is

  • Synthesis and study of oxides and chalcogenides : thin films and crystals

    Creator:
    Park, Sangmoon
    Abstract:
    Several types of solid-state inorganic materials are prepared and characterized. By using the SILAR (Successive Ionic Layer Adsorption and Reaction) deposition method in conjunction with hydrothermal dehydration both low-temperature deposition and crystallization of oxide thin films are achieved. Various aspects of new transparent p-type materials are studied by examining both...
    Resource Type:
    Dissertation
    Full Text:
    powder pattern of In2Se3 at 973 K, (g) the powder pattern of In2Se3 at 673 K, (h) a-In2Se3 ICSD 1376, (i

  • Refractory Amorphous Metal Thin Films

    Creator:
    Olsen, Kristopher R.
    Abstract:
    Amorphous metal thin films lack the grain boundaries and dislocations present in crystalline metal films. As a result, amorphous metal films can be more mechanically robust, atomically smooth, and more resistant to chemical attack than crystalline metals. However, amorphous metals are meta-stable and subject to crystallization upon heating, thus limiting...
    Resource Type:
    Dissertation
    Full Text:
    the change in Gibbs free energy for a process, ΔH is the change in enthalpy, T is absolute

  • A study of new optical materials I. Crystal-chemical development of new optical frequency converters II. New hosts for Cr3+ luminescence and lasing

    Creator:
    Schaffers, Kathleen I.
    Abstract:
    The emphasis of this work has been in two areas of optical materials - the crystal-chemical development of new optical frequency converters and the synthesis and study of new hosts for Cr³⁺ luminescence and lasing. A simple method has been developed to identify promising frequency-doubling materials containing triangular oxoanions by...
    Resource Type:
    Dissertation
    Full Text:
    ", Boca Raton, Fla.: CRC Press, 1986. 4. C. Chen, B. Wu, A. Jiang, and G. You, ScL Sin., Ser B 28, 235