Effect of contaminations and surface preparation on the work function of single layer MoS₂

• Oliver Ochedowski,
• Kolyo Marinov,
• Nils Scheuschner,
• Artur Poloczek,
• Benedict Kleine Bussmann,
• Janina Maultzsch and
• Marika Schleberger

Beilstein J. Nanotechnol. 2014, 5, 291–297, doi:10.3762/bjnano.5.32

• . 36, 10623 Berlin, Germany Solid State Electronics Department and CeNIDE, University of Duisburg-Essen, Lotharstr. 55, 47058 Duisburg, Germany 10.3762/bjnano.5.32 Abstract Thinning out MoS2 crystals to atomically thin layers results in the transition from an indirect to a direct bandgap material

• . This makes single layer MoS2 an exciting new material for electronic devices. In MoS2 devices it has been observed that the choice of materials, in particular for contact and gate, is crucial for their performance. This makes it very important to study the interaction between ultrathin MoS2 layers and

• materials employed in electronic devices in order to optimize their performance. In this work we used NC-AFM in combination with quantitative KPFM to study the influence of the substrate material and the processing on single layer MoS2 during device fabrication. We find a strong influence of contaminations

Preparation of NiS/ZnIn₂S₄ as a superior photocatalyst for hydrogen evolution under visible light irradiation

• Liang Wei,
• Yongjuan Chen,
• Jialin Zhao and
• Zhaohui Li

Beilstein J. Nanotechnol. 2013, 4, 949–955, doi:10.3762/bjnano.4.107

• photocatalytic hydrogen evolution. However, the precious metals are expensive and to reduce the cost of renewable hydrogen evolution, it is necessary to explore alternative co-catalysts based on inexpensive transition metals. Our recent studies revealed that MoS2, a good electrocatalyst for hydrogen evolution

• [34], can be an effective co-catalyst in promoting photocatalytic hydrogen evolution over ZnIn2S4 and MoS2/ZnIn2S4 show even superior performance for hydrogen evolution than Pt/ZnIn2S4 [35]. NiS, a p-type semiconductor, is also reported to be a good electrocatalyst for cathodic hydrogen evolution in

• /ZnIn2S4 and ZnIn2S4 (a) survey spectrum and high-resolution spectra for (b) S 2p; (c) Zn 2p and (d) In 3d. UV–vis diffraction spectra of the pure ZnIn2S4 and 0.25 wt %, 0.5 wt %, 1.0 wt %, 2.0 wt % NiS/ZnIn2S4. Amount of hydrogen evolution over (a) pure ZnIn2S4; (b) 0.2 wt % MoS2/ZnIn2S4; (c) mechanical

Effect of spherical Au nanoparticles on nanofriction and wear reduction in dry and liquid environments

• Dave Maharaj and
• Bharat Bhushan

Beilstein J. Nanotechnol. 2012, 3, 759–772, doi:10.3762/bjnano.3.85

• ], spherical MoS2 (15–60 nm) in poly-alpha-olefin (PAO) and 150 SN [18], spherical WS2 nanoparticles (50–350 nm) in SN 150 and SN 190 [19], spheroidal carbon-nano-onion nanoparticles (<10 nm) in PAO [20], WS2 nanoparticles (120 nm) in paraffin oil [21], MoS2 spheres (0.5–3 µm) in 500 SN oil [22] and carbon

Switching adhesion forces by crossing the metal–insulator transition in Magnéli-type vanadium oxide crystals

• Bert Stegemann,
• Matthias Klemm,
• Siegfried Horn and
• Mathias Woydt

Beilstein J. Nanotechnol. 2011, 2, 59–65, doi:10.3762/bjnano.2.8

• materials revealed consistent results: Comparative adhesion force measurements of the (0001) basal planes and the (10−10) prism planes of highly oriented pyrolytic graphite (HOPG) and MoS2 also showed that the metallic state lowers the adhesion at the nanoscale [36]. Experimental Vanadium oxide crystal

A collisional model for AFM manipulation of rigid nanoparticles

• Enrico Gnecco

Beilstein J. Nanotechnol. 2010, 1, 158–162, doi:10.3762/bjnano.1.19

• benchmark would be the flower-shaped Sb islands first manipulated by Ritter et al. on HOPG and MoS2 [9]. Possible discrepancies between theory and experiment concerning the direction of motion and angular speed of the islands could be related to the friction forces between island and substrate and even used