Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Author "Othonos, A."
Now showing items 21-36 of 36
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Sulfur doping of M/In2O3 (M=Al,W) nanowires with room temperature near infra red emission
Zervos, Matthew; Mihailescu, C.; Giapintzakis, John; Othonos, A.; Travlos, A. (2015)We have investigated the growth of Al doped In2O3 nanowires via the vapor-liquid-solid mechanism at 800°C using Au as a catalyst. We find that the Al is not incorporated into the cubic bixbyite crystal structure of In2O3 ...
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Surface passivation and conversion of SnO2 to SnS2 nanowires
Zervos, Matthew; Mihailescu, C. N.; Giapintzakis, John; Othonos, A.; Luculescu, C. R. (2015)SnO2 nanowires have been grown on Si(0 0 1) via the vapour-liquid-solid mechanism at 800 °C and then exposed to H2S between 300 and 600 °C. The SnS2/SnO2 nanowires obtained at 300 °C consist of tetragonal rutile SnO2 and ...
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Synthesis of hybrid polymethacrylate-noble metal (M = Au, Pd) nanoparticles for the growth of metal-oxide semiconductor nanowires
Zervos, Matthew; Demetriou, M.; Krasia-Christoforou, T.; Othonos, A.; Turcu, R. P. (2012)Metal-oxide semiconductor nanowires (NWs) such as ZnO, β-Ga 2O 3 and SnO 2 with diameters of tens of nanometres and lengths of many micrometres have been grown using micellar nanohybrids consisting of methacrylate-based ...
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Synthesis of Tin nitride Sn xN y nanowires by chemical vapour deposition
Zervos, Matthew; Othonos, A. (2009)Tin nitride (Sn xN y) nanowires have been grown for the first time by chemical vapour deposition on n-type Si(111) and in particular by nitridation of Sn containing NH 4Cl at 450 °C under a steady flow of NH 3. The Sn xN ...
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A systematic investigation into the conversion of Β-Ga 2O3 to GaN nanowires using NH3 and H 2: Effects on the photoluminescence properties
Othonos, A.; Zervos, Matthew; Christofides, C. (2010)GaN nanowires (NWs) with a hexagonal wurtzite crystal structure, diameters of 50 nm and lengths of 10 μm have been obtained from postgrowth nitridation of monoclinic Β-Ga2O3 NWs using NH3 between 700-1090 °C. The conversion ...
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A systematic study of the nitridation of SnO 2 nanowires grown by the vapor liquid solid mechanism
Zervos, Matthew; Othonos, A. (2012)SnO 2 nanowires (NWs) with diameters of 50 nm and lengths ≥10 μm have been grown at 800 °C on 1.0 nm Au/Si(001) via the vapor liquid solid mechanism and the low pressure chemical vapor deposition. These exhibited clear ...
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Tin oxide nanowires: The influence of trap states on ultrafast carrier relaxation
Othonos, A.; Zervos, Matthew; Tsokkou, D. (2009)We have studied the optical properties and carrier dynamics in SnO 2 nanowires (NWs) with an average radius of 50 nm that were grown via the vapor-liquid solid method. Transient differential absorption measurements have ...
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Ultrafast carrier relaxation in inn nanowires grown by reactive vapor transport
Othonos, A.; Zervos, Matthew; Pervolaraki, M. (2009)We have studied femtosecond carrier dynamics in InN nanowires grown by reactive vapor transport. Transient differential absorption measurements have been employed to investigate the relaxation dynamics of photogenerated ...
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Ultrafast hole carrier relaxation dynamics in p-type CuO nanowires
Othonos, A.; Zervos, Matthew (2011)Ultrafast hole carrier relaxation dynamics in CuO nanowires have been investigated using transient absorption spectroscopy. Following femtosecond pulse excitation in a non-collinear pump-probe configuration, a combination ...
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Ultrafast pulsed laser deposition of carbon nanostructures: Structural and optical characterization
Pervolaraki, M.; Komninou, P.; Kioseoglou, J.; Othonos, A.; Giapintzakis, John (2013)Carbon nanostructured materials were obtained by high-repetition rate pulsed laser ablation of a graphite target using a train of 10-ps duration pulses at 1064 nm in different pressures of high-purity Ar gas. It is ...
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Ultrafast Spectroscopy and Red Emission from β-Ga2O3/β-Ga2S3 Nanowires
Othonos, K. M.; Zervos, Matthew; Christofides, C.; Othonos, A. (2015)Ultrafast pump-probe and transient photoluminescence spectroscopy were used to investigate carrier dynamics in β-Ga2O3 nanowires converted to β-Ga2O3/Ga2S3 under H2S between 400 to 600 °C. The β-Ga2O3 nanowires exhibited ...
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Ultrafast time-resolved spectroscopy of In2 O3 nanowires
Tsokkou, D.; Othonos, A.; Zervos, Matthew (2009)Ultrafast carrier dynamics in In2 O3 nanowires with an average diameter of ≈100±20 nm grown by the vapor-liquid-solid method have been investigated in detail using differential absorption spectroscopy with femtosecond ...
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Ultrafast transient spectroscopy and photoluminescence properties of V 2O5 nanowires
Othonos, A.; Christofides, C.; Zervos, Matthew (2013)The properties of V2O5 semiconductor nanowires have been investigated using ultrashort transient absorption spectroscopy in conjunction with time resolved photoluminescence. Femtosecond pulse excitation has been utilized ...
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Ultraviolet emission from low resistance Cu2SnS3/SnO2 and CuInS2/Sn:In2O3 nanowires
Karageorgou, E.; Zervos, Matthew; Othonos, A. (2014)SnO2 and Sn:In2O3 nanowires were grown on Si(001), and p-n junctions were fabricated in contact with p-type Cu2S which exhibited rectifying current-voltage characteristics. Core-shell Cu2SnS3/SnO2 and CuInS2/Sn:In2O3 ...
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Well-defined fluoro- and carbazole-containing diblock copolymers: Synthesis, characterization and immobilization onto Au-coated silicon surfaces
Savva, I.; Demetriou, M.; Othonos, A.; Turcu, R.; Popa, A.; Macavei, S.; Krasia-Christoforou, T. (2012)A series of well-defined diblock copolymers consisting of 2-(N-carbazolyl)ethyl methacrylate (CbzEMA) and 2,2,3,3,4,4,4-heptafluorobutyl methacrylate (HFBMA) (CbzEMAx-b-HFBMAy) was synthesized by Reversible Addition-Fragmentation ...
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Article
Zn3N2nanowires: Growth, properties and oxidation
Zervos, Matthew; Karipi, C.; Othonos, A. (2013)Zinc nitride (Zn3N2) nanowires (NWs) with diameters of 50 to 100 nm and a cubic crystal structure have been grown on 1 nm Au/Al2O3via the reaction of Zn with NH3including H2between 500°C and 600°C. These exhibited an optical ...