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Browsing by Subject "Nanowires"

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    • Article  

      Biological charge transfer via flickering resonance 

      Zhang, Y.; Liu, C.; Balaeff, A.; Skourtis, Spiros S.; Beratan, David N. (2014)
      Biological electron-transfer (ET) reactions are typically described in the framework of coherent two-state electron tunneling or multistep hopping. However, these ET reactions may involve multiple redox cofactors in van ...

    • Article  

      Carrier dynamics and conductivity of SnO 2 nanowires investigated by time-resolved terahertz spectroscopy 

      Tsokkou, Demetra; Othonos, Andreas S.; 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 ...

    • Article  

      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 ...

    • Article  

      Carrier dynamics in InS nanowires grown via chemical vapor deposition 

      Othonos, A.; Zervos, Matthew (2010)
      Transient femtosecond absorption spectroscopy and timecorrelating single photon counting (TCSPC) photoluminescence (PL) were employed to study InS nanowires (NWs) grown by chemical vapor deposition (CVD) and determine the ...

    • Article  

      Carrier dynamics in InS nanowires grown via chemical vapor deposition 

      Othonos, Andreas S.; Zervos, Matthew (2010)
      Transient femtosecond absorption spectroscopy and timecorrelating single photon counting (TCSPC) photoluminescence (PL) were employed to study InS nanowires (NWs) grown by chemical vapor deposition (CVD) and determine the ...

    • Article  

      Carrier dynamics in Β-Ga2O3 nanowires 

      Othonos, A.; Zervos, Matthew; Christofides, C. (2010)
      Carrier dynamics have been investigated in Β-Ga2O 3 nanowires (NWs) grown by the vapor-liquid-solid mechanism, using ultrashort transient absorption spectroscopy in conjunction with time-correlating single photon counting ...

    • Article  

      Carrier relaxation dynamics in SnxNy nanowires grown by chemical vapor deposition 

      Othonos, A.; Zervos, Matthew (2009)
      Carrier relaxation dynamics in tin nitride (SnxNy) nanowires have been investigated using femtosecond transient absorption spectroscopy. The nanowires were grown directly on quartz using chemical vapor deposition and had ...

    • Article  

      Carrier relaxation dynamics in SnxNy nanowires grown by chemical vapor deposition 

      Othonos, Andreas S.; Zervos, Matthew (2009)
      Carrier relaxation dynamics in tin nitride (SnxNy) nanowires have been investigated using femtosecond transient absorption spectroscopy. The nanowires were grown directly on quartz using chemical vapor deposition and had ...

    • Article  

      Core-shell PbS/Sn:In2O3 and branched PbIn2S4/Sn:In2O3 nanowires in quantum dot sensitized solar cells 

      Zervos, Matthew; Vasile, Eugeniu; Tanasǎ, Eugenia; Othonos, Andreas S. (2017)
      Core-shell PbS/Sn:In2O3 and branched PbIn2S4/Sn:In2O3 nanowires have been obtained via the deposition of Pb over Sn:In2O3 nanowires and post growth processing under H2S between 100 C-200 C and 300 C-500 C respectively. The ...

    • Article  

      Core-shell PbS/Sn:In2O3 and branched PbIn2S4/Sn:In2O3 nanowires in quantum dot sensitized solar cells 

      Zervos, Matthew; Vasile, E.; Vasile, E.; Othonos, A. (2017)
      Core-shell PbS/Sn:In2O3 and branched PbIn2S4/Sn:In2O3 nanowires have been obtained via the deposition of Pb over Sn:In2O3 nanowires and post growth processing under H2S between 100 C-200 C and 300 C-500 C respectively. The ...

    • Article  

      Current transport in semiconductor nanowires with built-in barriers based on a 1D transfer matrix calculation 

      Zervos, Matthew; Pelekanos, N. T. (2008)
      A one dimensional (1D) transfer matrix calculation of current transport in semiconductor nanowires with built-in barriers is described within the effective mass approximation by taking into account (i) the quantum confinement ...

    • Article  

      Current Transport Properties of CuS/Sn:In2O3 versus CuS/SnO2 Nanowires and Negative Differential Resistance in Quantum Dot Sensitized Solar Cells 

      Zervos, Matthew; Vasile, Eugeniu; Tanasǎ, Eugenia; Karageorgou, E.; Othonos, Andreas S. (2016)
      The structural, optical, and electrical transport properties of nanowires obtained by the deposition of Cu over Sn doped In2O3 and SnO2 nanowires followed by processing under H2S between 100 and 500°C have been investigated ...

    • Article  

      Defect states of chemical vapor deposition grown GaN nanowires: Effects and mechanisms in the relaxation of carriers 

      Tsokkou, Demetra; Othonos, Andreas S.; 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 ...

    • 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 ...

    • Article  

      Delta(δ)-doping of semiconductor nanowires 

      Zervos, Matthew (2013)
      The electronic sub-band structure of single δ-layers in GaAs nanowires have been determined via the self-consistent solution of the Poisson-Schrödinger equations in the effective mass approximation. The spread and sheet ...

    • Article  

      Electrical, structural, and optical properties of sulfurized Sn-doped In2O3 nanowires 

      Zervos, Matthew; Mihailescu, C. N.; Giapintzakis, Ioannis; Othonos, Andreas S.; Travlos, A.; Luculescu, C. R. (2015)
      Sn-doped In2O3 nanowires have been grown on Si via the vapor-liquid-solid mechanism at 800 °C and then exposed to H2S between 300 to 600 °C. We observe the existence of cubic bixbyite In2O3 and hexagonal SnS2 after processing ...

    • Article  

      Electrical, structural, and optical properties of sulfurized Sn-doped In2O3 nanowires 

      Zervos, Matthew; Mihailescu, C. N.; Giapintzakis, John; Othonos, A.; Travlos, A.; Luculescu, C. R. (2015)
      Sn-doped In2O3 nanowires have been grown on Si via the vapor-liquid-solid mechanism at 800 °C and then exposed to H2S between 300 to 600 °C. We observe the existence of cubic bixbyite In2O3 and hexagonal SnS2 after processing ...

    • Article  

      Electronic properties of core-shell nanowire resonant tunneling diodes 

      Zervos, Matthew (2014)
      The electronic sub-band structure of InAs/InP/InAs/InP/InAs core-shell nanowire resonant tunneling diodes has been investigated in the effective mass approximation by varying the core radius and the thickness of the InP ...

    • Article  

      Electronic structure of piezoelectric double-barrier InAs/InP/InAs/InP/InAs (111) nanowires 

      Zervos, Matthew; Feiner, L.-F. (2004)
      The numerical self-consistent solution of the Poisson-Schrodinger equations in cylindrical coordinates for calculating electronic states in the effective mass approximation was implemented. High accuracy and rapid convergence ...

    • Article  

      Enhanced growth and photoluminescence properties of SnxN y (x>y) nanowires grown by halide chemical vapor deposition 

      Zervos, Matthew; Othonos, Andreas S. (2011)
      Tin nitride nanowires have been grown by halide chemical vapor deposition via the reaction of Sn with NH4Cl at 425 °C under a steady flow of NH3 using small ramp rates y) with a hexagonal structure, i.e. c=5.193 , a=3.725 ...

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