Enhanced photocatalytic activity of Ag–ZnO hybrid plasmonic nanostructures prepared by a facile wet chemical method

• Sini Kuriakose,
• Vandana Choudhary,
• Biswarup Satpati and
• Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2014, 5, 639–650, doi:10.3762/bjnano.5.75

• +]/[citrate] ratio of 1: 10, as photocatalysts. Schematic band diagram of Ag–ZnO hybrid nanostructure showing the charge redistribution processes that lead to the photocatalytic degradation of MB dye. (a,b) Kinetics of MB photodegradation by Ag–ZnO hybrid plasmonic nanostructures with different Ag

Kelvin probe force microscopy of nanocrystalline TiO₂ photoelectrodes

• Alex Henning,
• Gino Günzburger,
• Res Jöhr,
• Yossi Rosenwaks,
• Biljana Bozic-Weber,
• Catherine E. Housecroft,
• Edwin C. Constable,
• Ernst Meyer and
• Thilo Glatzel

Beilstein J. Nanotechnol. 2013, 4, 418–428, doi:10.3762/bjnano.4.49

• -potential detection method that determines the contact potential difference (CPD) during scanning by compensating the electrostatic forces between a microscopic tip and the sample [34]. Figure 2a illustrates a schematic band diagram for a KPFM tip in close proximity to a semiconductor sample surface with

• the dye molecule, which donates electrons under illumination and hence changes the surface potential. To our best knowledge, the measured SPV is not understood well enough to represent it generally in a band diagram without making major assumptions. Further studies are needed to clarify this point

• electrons are injected from the adsorbed dye molecules into the conduction band, Ecb, of the wide-bandgap metal oxide (nanoporous TiO2) resulting in an open-circuit voltage, Voc. Schematic band diagram for a KPFM tip in close proximity to an n-type semiconductor surface (a) in the dark and (b) under

Influence of diffusion on space-charge-limited current measurements in organic semiconductors

• Thomas Kirchartz

Beilstein J. Nanotechnol. 2013, 4, 180–188, doi:10.3762/bjnano.4.18

• light red background in the band diagram in Figure 1c. The traps are essentially always below the quasi Fermi levels for electrons and holes and will therefore be occupied with electrons. The space charge of the electrons on the traps creates an electrostatic barrier (highlighted in red) close to the

• equations. (a) Current–voltage curves of a device with and without charged acceptor-like defects with a total concentration NT = 1017 cm−3 and a Gaussian width of σ = 100 meV are compared to the Mott–Gurney law (Equation 1). Band diagram of the device (b) without charged defects and (c) with charged defects

• V (as in Figure 1a) and a device with no defects but a built-in voltage Vbi = 1 V are compared to the Mott–Gurney law (Equation 1). Band diagram of the device (b) without charged defects and Vbi = 1 V and (c) with charged defects and Vbi = 0 V. Both band diagrams are depicted at short circuit

Highly efficient ZnO/Au Schottky barrier dye-sensitized solar cells: Role of gold nanoparticles on the charge-transfer process

• Tanujjal Bora,
• Htet H. Kyaw,
• Soumik Sarkar,
• Samir K. Pal and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2011, 2, 681–690, doi:10.3762/bjnano.2.73

• ZnO/Au-nanocomposite photoelectrodes. The optical absorption was measured by removing the dye molecules from the respective photoelectrodes (size = 1 cm2) by dipping them in a 0.1 mM KOH aqueous solution (2 mL) for 5 min. Energy-band diagram depicting the possible electron-transfer path in the ZnO/Au