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Filtering by: Creator Alotaibi, Abdulaziz M. Remove constraint Creator: Alotaibi, Abdulaziz M. Degree Field Physics Remove constraint Degree Field: Physics

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  • Optical Analysis of Titania : Band Gaps of Brookite, Rutile and Anatase

    Creator:
    Lance, Ryan A.
    Abstract:
    The optical transition in high-fraction polymorphs of titania (TiO2) were investigated to determine the band gap behavior of the most common polymorphs—brookite, rutile, and anatase—the values of which are varied in the literature. The direct optical band gaps of brookite, rutile, and anatase, were determined to be 3.37(7)eV, 3.41(11)eV and...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    and rutile. Nanotechnology,19(14), 145605. [4] Alotaibi, A. M., Sathasivam, S., Williamson, B. A

  • Characterizing Optical Signatures of TiO₂ Amorphous Precursors

    Creator:
    Berry, Patrick
    Abstract:
    TiO₂ typically crystallizes into three polymorphs: brookite, rutile, and anatase. The phase selection problem in TiO₂ is the lack of understanding what conditions cause amorphous TiO₂ to crystallize into one of its three polymorphs during an annealing process. It has been recently shown that phase selection in TiO₂ is highly...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    . Scientific Reports 7, (2017). [4] Alotaibi, A. M., Sathasivam, S., Williamson, B. A., Kafizas, A

  • Amorphous TiO₂ : A Thin Film Synthesis Route to Stabilization of Metastable TiO₂ Brookite

    Creator:
    Haggerty, James E. S.
    Abstract:
    Structure-specific synthesis processes are of key importance to the growth of polymorphic functional compounds such as TiO₂, where material properties strongly depend on structure as well as chemistry. The robust growth of the brookite polymorph of TiO₂, a promising photocatalyst, has been difficult in both powder and thin-film forms due...
    Resource Type:
    Dissertation and Video
    Full Text:
    comparison. (a)-(b) Optical image and micro-Raman spectra for the small (~1μm) region inside the white box