View All Items
(1 - 4 of 4)
- Title
- APOIKIA IN THE BLACK SEA: THE HISTORY OF HERACLEA PONTICA, SINOPE, AND TIOS IN THE ARCHAIC AND CLASSICAL PERIODS.
- Creator
-
Wojkiewicz, Austin M, Dandrow, Edward, University of Central Florida
- Abstract / Description
-
This study examines the influence of local and dominant Network Systems on the socio- economic development of the southern Black Sea colonies: Heraclea Pontica, Sinope, and Tios during the Archaic and Classical Period. I argue that archeological and literary evidence indicate that local (populations such as the Mariandynoi, Syrians, Caucones, Paphlagonians, and Tibarenians) and dominant external (including: Miletus, Megara/Boeotia, Athens, and Persia) socio-economic Network systems developed...
Show moreThis study examines the influence of local and dominant Network Systems on the socio- economic development of the southern Black Sea colonies: Heraclea Pontica, Sinope, and Tios during the Archaic and Classical Period. I argue that archeological and literary evidence indicate that local (populations such as the Mariandynoi, Syrians, Caucones, Paphlagonians, and Tibarenians) and dominant external (including: Miletus, Megara/Boeotia, Athens, and Persia) socio-economic Network systems developed and shaped these three colonies, and helped explain their role in the overarching Black Sea Network. This study is divided into three chapters. Chapter one starts with the history and historiography of Greek colonization. This leads into an explanation of early Black Sea colonization and a brief history of Heraclea, Sinope, and Tios from their foundation in the Archaic period until their transition into the Roman provincial system. It then explains Network Theory and Middle Ground and how they will be utilized in chapters two and three. The second chapter uses a middle ground approach to analyze local networks and their influence on the socio-economic development of the three colonies. The second chapter primarily utilizes material evidence and literary sources such as Strabo and Xenophon to draw these conclusions. The third chapter examines the effect that the dominant network systems during these periods have on the colonies' socio-economic development. This chapter primarily focuses on the Black Sea, Athens, and Persia's networks and their interactions with the colonies. Ultimately, this project furthers the current understanding of Heraclea, Sinope, Tios and the Black Sea's economic development as a whole.
Show less - Date Issued
- 2018
- Identifier
- CFH2000324, ucf:45706
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000324
- Title
- Spray_Deposited Titanium-Oxide Films For Infrared Optics, Photonics, And Solar Cell Applications.
- Creator
-
Alhasan, Sarmad, Peale, Robert, Sundaram, Kalpathy, Mikhael, Wasfy, Abdolvand, Reza, Kar, Aravinda, University of Central Florida
- Abstract / Description
-
Self-assembled TiO2 foam-like films, were grown by the water based Streaming Process for ElectrodelessElectrochemical Deposition (SPEED). The morphology of the 1 m thick films consistsof a tangled ropy structure with individual strands of 200 nm diameter and open pores of 0.1to 3 micron dimensions. Such films are advantageous for proposed perovskite solar cell comprisingCH3NH3PbI3 absorber with additional inorganic films as contact and conduction layers,all deposited by SPEED. Lateral film...
Show moreSelf-assembled TiO2 foam-like films, were grown by the water based Streaming Process for ElectrodelessElectrochemical Deposition (SPEED). The morphology of the 1 m thick films consistsof a tangled ropy structure with individual strands of 200 nm diameter and open pores of 0.1to 3 micron dimensions. Such films are advantageous for proposed perovskite solar cell comprisingCH3NH3PbI3 absorber with additional inorganic films as contact and conduction layers,all deposited by SPEED. Lateral film resistivity is in the range 20 - 200 k-cm, increasing withgrowth temperature, while sheet resistance is in the range 2 ?? 20 108 /Sq. Xray diffractionconfirms presence of TiO2 crystals of orthorhombic class (Brookite). UV-vis spectroscopy showshigh transmission below the expected 3.2 eV TiO2 bandgap. Transmittance increases with growthtemperature. This is a Ropy TiO2 thin film.We also prepared a Smooth TiO2 thin film. Self-assembled TiO2 film deposited by aqueous-spraydeposition was investigated to evaluate morphology, crystalline phase, and infrared optical constants.The Anatase nano-crystalline film had 10 nm characteristic surface roughness sparselypunctuated by defects of not more than 200 nm amplitude. The film is highly transparent throughoutthe visible to wavelengths of 12 m. The indirect band gap was determined to be 3.2 eV. Importantfor long-wave infrared applications is that dispersion in this region is weak compared with themore commonly used dielectic SiO2 for planar structures. The low-cost, large-area, atmosphericpressure,chemical spray deposition method allows conformal fabrication on flexible substrates forlong-wave infrared photonics.For comparison TiO2 films deposited by electron-beam evaporation were evaluated to determinemorphology, crystalline phase, and optical transparency.The evaporated TiO2 film was amorphous but crystallized into Anatase phase after annealing.Such film is attractive as electron conductor of unprecedented thinness and flexibility for proposedperovskite solar cell comprising CH3NH3PbI3 absorber with additional inorganic films as contactand conduction layers. The spray deposition method would allow conformal solar cell fabricationon flexible substrates for wearable power generation. Band gap of Evaporated TiO2 film is 4.0 eV.We prepared BaTiO3 thin film to know infrared pyroelectric response.Self-assembled nano-crystalline BaTiO3 films on stainless steel foil substrates, were grown by thewater based Streaming Process for Electrodeless Electrochemical Deposition (SPEED). SPEED isan aqueous process that deposits self-assembled nano-crystalline inorganic thin films over largeareas, without a vacuum, providing a scalable and manufacturing friendly process to fabricatedurable films. The morphology of the 1m thick films comprises single crystals of micron dimensionsimbedded in a matrix of nanocrystals. XRD confirms presence of BaTiO3 crystals ofhexagonal phase for samples annealed at 500C. Subsequent annealing at 600C transforms thefilm to the cubic phase. Potential applications include dielectric layers, capacitors, waveguides,ferroelectric RAM, pyroelectric infrared detectors, and phosphors. Characterization of infraredpyroelectric response at 10m wavelength shows an initially good sensitivity that reversibly decaysover a period of days due to water vapor absorption. A short-lived photo-response due topoling of the hydrated sample is also observed. We studied BaTiO3 to know hysteresis loop.Pyroelectric photoresponse of aqueous spray deposited thin films containing BaTiO3 nano-crystalsis reported. X-ray diffraction data indicate the presence of hexagonal BaTiO3 nano-crystals with20 nm crystalline domains in a matrix of some as yet unidentified nano-crystalline material.When the film is annealed at 600C, the X-ray pattern changes significantly and indicates a conversionto one of the non-hexagonal phases of BaTiO3 as well as a complete change in the matrix.With suitable amplifier, the measured photoresponse was 40V/W.Ferroelectric hysteresis on a film with significant presence of hexagonal BaTiO3 shows saturatedpolarization which is about 5-times smaller than for the bulk tetragonal phase.
Show less - Date Issued
- 2017
- Identifier
- CFE0006710, ucf:51899
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006710
- Title
- A Linear Multiplexed Electrospray Thin Film Deposition System.
- Creator
-
Lojewski, Brandon, Deng, Weiwei, Chen, Ruey-Hung, Chen, Quanfang, University of Central Florida
- Abstract / Description
-
Liquid spray is essential to industries requiring processes such as spray coating, spray drying, spray pyrolysis, or spray cooling. This thesis reports the design, fabrication, and characterization of a thin film deposition system which utilizes a linear multiplexed electrospray (LINES) atomizer. First, a thorough review of the advantages and limitations of prior multiplexed electrospray systems leads to discussion of the design rationale for this work. Next, the line of charge model was...
Show moreLiquid spray is essential to industries requiring processes such as spray coating, spray drying, spray pyrolysis, or spray cooling. This thesis reports the design, fabrication, and characterization of a thin film deposition system which utilizes a linear multiplexed electrospray (LINES) atomizer. First, a thorough review of the advantages and limitations of prior multiplexed electrospray systems leads to discussion of the design rationale for this work. Next, the line of charge model was extended to prescribe the operating conditions for the experiments and to estimate the spray profile. The spray profile was then simulated using a Lagrangian model and solved using a desktop supercomputer based on Graphics Processing Units (GPUs). The simulation was extended to estimate the droplet number density flux during deposition. Pure ethanol was electrosprayed in the cone-jet mode from a 51-nozzle aluminum LINES atomizer with less than 3% relative standard deviation in the D10 average droplet diameter as characterized using Phase Doppler Interferometry (PDI). Finally a 25-nozzle LINES was integrated into a thin film deposition system with a heated, motion controlled stage, to deposit TiO2 thin films onto silicon wafers from an ethanol based nanoparticle suspension. The resulting deposition pattern was analyzed using SEM, optical profilometry, and macro photography and compared with the numerical simulation results. The LINES tool developed here is a step forward to enabling the power of electrospray for industrial manufacturing applications in clean energy, health care, and electronics.
Show less - Date Issued
- 2013
- Identifier
- CFE0005106, ucf:50745
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005106
- Title
- Structure, stability, vibrational, thermodynamic, and catalytic properties of metal nanostructures: size, shape, support, and adsorbate effects.
- Creator
-
Behafarid, Farzad, Roldan Cuenya, Beatriz, Chow, Lee, Heinrich, Helge, Kara, Abdelkader, Schoenfeld, Winston, University of Central Florida
- Abstract / Description
-
Recent advances in nanoscience and nanotechnology have provided the scientific community with exciting new opportunities to rationally design and fabricate materials at the nanometer scale with drastically different properties as compared to their bulk counterparts. In this dissertation, several challenges have been tackled in aspects related to nanoparticle (NP) synthesis and characterization, allowing us to make homogenous, size- and shape-selected NPs via the use of colloidal chemistry,...
Show moreRecent advances in nanoscience and nanotechnology have provided the scientific community with exciting new opportunities to rationally design and fabricate materials at the nanometer scale with drastically different properties as compared to their bulk counterparts. In this dissertation, several challenges have been tackled in aspects related to nanoparticle (NP) synthesis and characterization, allowing us to make homogenous, size- and shape-selected NPs via the use of colloidal chemistry, and to gain in depth understanding of their distinct physical and chemical properties via the synergistic use of a variety of ex situ, in situ, and operando experimental tools. A variety of phenomena relevant to nanosized materials were investigated, including the role of the NP size and shape in the thermodynamic and electronic properties of NPs, their thermal stability, NP-support interactions, coarsening phenomena, and the evolution of the NP structure and chemical state under different environments and reaction conditions.
Show less - Date Issued
- 2012
- Identifier
- CFE0004779, ucf:49796
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004779
