Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Author "Tsokkou, D."
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Carrier dynamics and conductivity of SnO 2 nanowires investigated by time-resolved terahertz spectroscopy
Tsokkou, D.; Othonos, A.; Zervos, Matthew (2012)THz spectroscopy has been applied to investigate the photo-induced and intrinsic conductivity in SnO 2 nanowires using the Drude-Smith model. The refractive index of the nanowires was found to decrease from 2.4 to 2.1 with ...
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Article
Defect states of chemical vapor deposition grown GaN nanowires: Effects and mechanisms in the relaxation of carriers
Tsokkou, D.; Othonos, A.; Zervos, Matthew (2009)Carrier relaxation in GaN nanowires, grown by atmospheric pressure chemical vapor deposition, via direct nitridation of Ga with NH3 at 950 °C has been investigated in detail. Differential absorption measurements reveal a ...
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Article
Femtosecond carrier dynamics in In 2O 3 nanocrystals
Othonos, A.; Zervos, Matthew; Tsokkou, D. (2009)We have studied carrier dynamics in In 2O 3 nanocrystals grown on a quartz substrate using chemical vapor deposition. Transient differential absorption measurements have been employed to investigate the relaxation dynamics ...
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Low temperature growth of In 2O 3 and InN nanocrystals on Si(111) via chemical vapour deposition based on the sublimation of NH 4Cl in In
Zervos, Matthew; Tsokkou, D.; Pervolaraki, M.; Othonos, A. (2009)Indium oxide (In 2O 3) nanocrystals (NCs) have been obtained via atmospheric pressure, chemical vapour deposition (APCVD) on Si(111) via the direct oxidation of In with Ar:10% O 2 at 1000 °C but also at temperatures as low ...
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Structural properties of SnO2 nanowires and the effect of donor like defects on its charge distribution
Zervos, Matthew; Othonos, A.; Tsokkou, D.; Kioseoglou, J.; Pavlidou, E.; Komninou, P. (2013)Tin oxide (SnO2) nanowires (NWs) with diameters of 50 nm, lengths up to 100 μm and a tetragonal rutile crystal structure have been grown by low pressure reactive vapour transport on 1 nm Au/Si(001). The free carrier density ...
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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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Article
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 ...