Browsing by Author "Kyratsi, Theodora"
Now showing items 1-20 of 123
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Article
A2Bi8Se13 (A = Rb, Cs), CsBi3.67Se6, and BaBi2Se4: New ternary semiconducting bismuth selenides
Iordanidis, L.; Brazis, P. W.; Kyratsi, Theodora; Ireland, J.; Lane, M.; Kannewurf, C. R.; Chen, W.; Dyck, J. S.; Uher, C.; Ghelani, N. A.; Hogan, T.; Kanatzidis, M. G. (2001)Rb2Bi8Se13 (I), Cs2Bi8Se13 (II), CsBi3.67Se6 (III), and BaBi2Se4 (IV) were synthesized by direct combination reactions of the A/Se (A = Rb, Cs, Ba) and Bi2Se3 at ≥650 °C. Their structures were determined by single-crystal ...
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Article
Ball Milling Effect on the CO2 Uptake of Mafic and Ultramafic Rocks: A Review
Rigopoulos, Ioannis; Ioannou, Ioannis; Delimitis, Andreas; Efstathiou, Angelos M.; Kyratsi, Theodora (2018)Mineral carbonation is considered to be the most stable mechanism for the sequestration of CO2. This study comprises a comparative review of the effect of ball milling on the CO2 uptake of ultramafic/mafic lithologies, ...
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Article
Ball Milling Effect on the CO2 Uptake of Mafic and Ultramafic Rocks: A Review
Rigopoulos, Ioannis; Ioannou, Ioannis; Delimitis, Andreas; Efstathiou, Angelos M.; Kyratsi, Theodora (2018)Mineral carbonation is considered to be the most stable mechanism for the sequestration of CO2. This study comprises a comparative review of the effect of ball milling on the CO2 uptake of ultramafic/mafic lithologies, ...
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Article
Bi/Sb distribution and its consequences in solid solution members of the thermoelectric materials K2Bi8-xSbxSe13
Kyratsi, Theodora; Chung, D. Y.; Kanatzidis, M. G. (2002)In an effort to understand the nature of mass fluctuations introduced when β-K2Bi8Se13 is alloyed with K2Sb8Se13 we determined the detailed crystal structures of two solid solutions of the type K2Bi8-xSbxSe13 with x=4.0 ...
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Article
Carbon dioxide storage in olivine basalts: Effect of ball milling process
Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, Andréas; Ioannou, Ioannis; Efstathiou, Angelos M.; Kyratsi, Theodora (2015)The goal of this study is to propose a cost-effective method for the optimization of the ex situ carbonation of basaltic rocks. The ball milling process was applied to a sample of olivine basalt from the Troodos ophiolite ...
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Article
Carbon dioxide storage in olivine basalts: Effect of ball milling process
Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, A.; Ioannou, Ioannis; Efstathiou, A. M.; Kyratsi, Theodora (2015)The goal of this study is to propose a cost-effective method for the optimization of the ex situ carbonation of basaltic rocks. The ball milling process was applied to a sample of olivine basalt from the Troodos ophiolite ...
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Article
Carbon dioxide storage in olivine basalts: Effect of ball milling process
Rigopoulos, Ioannis; Petallidou, Klito C.; Vasiliades, Michalis A.; Delimitis, A.; Ioannou, Ioannis; Efstathiou, A. M.; Kyratsi, Theodora (2015)The goal of this study is to propose a cost-effective method for the optimization of the ex situ carbonation of basaltic rocks. The ball milling process was applied to a sample of olivine basalt from the Troodos ophiolite ...
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Article
Carbon nanotube-reinforced crosslinked polyethylene pipes for geothermal applications: From synthesis to decomposition using analytical pyrolysis-GC/MS and thermogravimetric analysis
Roumeli, E.; Markoulis, A.; Kyratsi, Theodora; Bikiaris, D.; Chrissafis, K. (2014)Carbon nanotube reinforced crosslinked high density polyethylene (PEX) nanocomposites were synthesized for geothermal applications requiring higher polymer thermal conductivity and a comprehensive thermal decomposition ...
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Article
Carbon sequestration via enhanced weathering of peridotites and basalts in seawater
Rigopoulos, Ioannis; Harrison, Anna L.; Delimitis, Andreas; Ioannou, Ioannis; Efstathiou, Angelos M.; Kyratsi, Theodora; Oelkers, Eric H. (2018)Enhanced weathering of mafic and ultramafic rocks has been suggested as a carbon sequestration strategy for the mitigation of climate change. This study was designed to assess the potential drawdown of CO2 directly from ...
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Article
Carbon sequestration via enhanced weathering of peridotites and basalts in seawater
Rigopoulos, Ioannis; Harrison, Anna L.; Delimitis, Andreas; Ioannou, Ioannis; Efstathiou, Angelos M.; Kyratsi, Theodora; Oelkers, Eric H. (2018)Enhanced weathering of mafic and ultramafic rocks has been suggested as a carbon sequestration strategy for the mitigation of climate change. This study was designed to assess the potential drawdown of CO2 directly from ...
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Article
Carbon sequestration via enhanced weathering of peridotites and basalts in seawater
Rigopoulos, I.; Harrison, A. L.; Delimitis, A.; Ioannou, I.; Efstathiou, A. M.; Kyratsi, Theodora; Oelkers, E. H. (2018)Enhanced weathering of mafic and ultramafic rocks has been suggested as a carbon sequestration strategy for the mitigation of climate change. This study was designed to assess the potential drawdown of CO2 directly from ...
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Conference Object
Carrier mapping in thermoelectric materials
Polymeris, G. S.; Hatzikraniotis, E.; Stefanaki, E. C.; Pavlidou, E.; Kyratsi, Theodora; Paraskevopoulos, K. M.; Kanatzidis, M. G. (Affiliation: Physics Department, Aristotle University of Thessaloniki, GR- 54124, Thessaloniki, GreeceAffiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 1678 Nicosia, CyprusAffiliation: Department of Chemistry, Northwestern University, 2145 North Sheridan Road, Evanston, IL 60208, United StatesCorrespondence Address: Physics Department, Aristotle University of Thessaloniki, GR- 54124, Thessaloniki, Greece, 2013)The application of micro-fourier transform infrared (FT1R) mapping analysis to thermoelectric materials towards identification of doping inhomogeneities is described. Micro-FTIR, in conjunction with fitting, is used as ...
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Article
Changes in the electronic properties of Bi2X3 (X: Se, Te) single crystals due to intercalation
Kyratsi, Theodora; Hatzikraniotis, E.; Paraskevopoulos, K. M.; Chrissafis, K. (1997)Bi2Se3 and Bi2Te3 are layered semiconductors n-type and p-type, respectively, which belong to the family of thermoelectric materials. In this work we examine the insertion of Cu in Bi 2Te3 and Bi2Se3 single crystals through ...
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Article
ChemInform Abstract: Syntheses, Crystal Structures and Electronic Structures of New Metal Chalcoiodides Bi2CuSe3I and Bi6Cu3S10I.
Liang, I‐C; Bilc, Daniel I.; Manoli, Maria; Chang, Wei‐Yun; Lin, Wen‐Fu; Kyratsi, Theodora; Hsu, Kuei‐Fang (2016)
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Conference Object
Crystal growth of ternary and quaternary alkali metal bismuth chalcogenides using Bridgman technique
Kyratsi, Theodora; Chung, D. Y.; Choi, K.-S.; Dick, J. S.; Chen, W.; Uher, C.; Kanatzidis, M. (Affiliation: Dept. of Chemistry, Center of Fundamental Mat. Research, Michigan State University, East Lansing, MI 48824-1322, United StatesCorrespondence Address: Kyratsi, T.Dept. of Chemistry, Center of Fundamental Mat. Research, Michigan State University, East Lansing, MI 48824-1322, United States, 2001)Our exploratory research in new thermoelectric materials has identified the ternary and quaternary bismuth chalcogenides β-K2Bi8Se13, K2.5Bi8.5Se14 and K1+xPb4-2xBi7+xSe15, to have promising properties for thermoelectric ...
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Article
Crystal/glass phase change in KSb5S8 studied through thermal analysis techniques
Chrissafis, K.; Kyratsi, Theodora; Paraskevopoulos, K. M.; Kanatzidis, M. G. (2004)The reversible crystal-glass and glass-crystal transitions discovered in KSb5S8 were studied in detail with nonisothermal scanning calorimetry techniques. When cooled, molten KSb5S8 becomes a metastable glass, which can ...
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Article
CsMBi3Te6 and CsM2Bi3Te7 (M = Pb, Sn): New thermoelectric compounds with low-dimensional structures
Hsu, K. F.; Chung, D. Y.; Lal, S.; Mrotzek, A.; Kyratsi, Theodora; Hogan, T.; Kanatzidis, M. G. (2002)The new materials CsPbBi3Te6 nad CsPb2Bi3Te7 were discovered through reactions of CsBi4Te6 with PbTe, whereas the isostructural materials CsSnBi3Te6 and CsSn2Bi3Te7 were discovered through corresponding reactions with SnTe. ...
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Conference Object
Design of an Air-Cooled Thermoelectric Generator through Modeling and Simulation, for use in Cement Industries
Charilaou, K.; Kyratsi, Theodora; Louca, Loucas (2019)
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Article
Design of ball-milling experiments on Bi2Te3 thermoelectric material
Kanatzia, A.; Papageorgiou, Ch; Lioutas, Ch; Kyratsi, Theodora (2013)In this work, factorial ball-milling experiments have been applied to Bi2Te3 material, for the first time, aiming to investigate the effect of the main process parameters on the structural features and thermoelectric ...
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Article
Design, assembly and characterization of silicide-based thermoelectric modules
Skomedal, Gunstein; Holmgren, Lennart; Middleton, Hugh; Eremin, I. S.; Isachenko, G. N.; Jaegle, Martin; Tarantik, Karina; Vlachos, Nikolas; Manoli, Maria; Kyratsi, Theodora; Berthebaud, David; Dao Truong, Nhi Y.; Gascoin, Franck (2016)