X-ray absorption spectroscopy by full-field X-ray microscopy of a thin graphite flake: Imaging and electronic structure via the carbon K-edge

• Carla Bittencourt,
• Adam P. Hitchock,
• Xiaoxing Ke,
• Gustaaf Van Tendeloo,
• Chris P. Ewels and
• Peter Guttmann

Beilstein J. Nanotechnol. 2012, 3, 345–350, doi:10.3762/bjnano.3.39

• buoyant densities, which vary with the graphene thickness. Raman studies on samples produced by the same technique found no impurities, such as amorphous carbon, in the sample [21][22]. The setup of the HZB full-field X-ray microscope (Figure 1) is analogous to that of a bright-field light microscope: the

Nanostructured, mesoporous Au/TiO₂ model catalysts – structure, stability and catalytic properties

• Matthias Roos,
• Dominique Böcking,
• Kwabena Offeh Gyimah,
• Gabriela Kucerova,
• Joachim Bansmann,
• Johannes Biskupek,
• Ute Kaiser,
• Nicola Hüsing and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2011, 2, 593–606, doi:10.3762/bjnano.2.63

• conventional bright-field TEM mode with much lower sensitivity and spatial resolution than obtained on the present instrument (FEI Titan). On the former instrument, the smallest Au particles that could be detected within the background of the porous matrix were around 1.2 nm in diameter. In the current

Tip-enhanced Raman spectroscopic imaging of patterned thiol monolayers

• Johannes Stadler,
• Thomas Schmid,
• Lothar Opilik,
• Phillip Kuhn,
• Petra S. Dittrich and
• Renato Zenobi

Beilstein J. Nanotechnol. 2011, 2, 509–515, doi:10.3762/bjnano.2.55

• transfer a monolayer of 2-PySH onto the gold surface. To pattern the surface of the gold film, a microcontact printing stamp with differently sized elevated circles in hexagonal arrays was used (Figure 6). In Figure 6, a bright field image of the stamp layout is depicted. The stamp consists of an array of

• printing process. Incubation of the stamp in ethanolic solution with subsequent printing on a template-stripped gold surface. (b) Magnified bright field image of a microcontact printing stamp for thiol deposition. The stamp consists of 650 μm hexagons filled with regular arrays of circles of different

Nanoscaled alloy formation from self-assembled elemental Co nanoparticles on top of Pt films

• Luyang Han,
• Ulf Wiedwald,
• Johannes Biskupek,
• Kai Fauth,
• Ute Kaiser and
• Paul Ziemann

Beilstein J. Nanotechnol. 2011, 2, 473–485, doi:10.3762/bjnano.2.51

• , namely mechanical grinding and polishing followed by low angle Ar+-ion etching. Bright-field TEM and aberration corrected HRTEM images were taken on a FEI Titan TEM equipped with a Cs imaging corrector. Scanning TEM and energy dispersive X-ray spectra (EDX) were acquired on a FEI Titan equipped with an

• HAADF-STEM detector and EDAX SiLi X-ray detector. Typical bright field TEM images in the as-prepared state (TA = 250 °C) and after annealing at 400 °C are shown in Figure 7. Apart from the MgO substrate and the Pt(100) film, the protective layer of SiO2 is also visible. In the as-prepared state an

• presented. The data of the as-prepared state was taken from [11]. Details are discussed in the text. Bright field TEM images of Co NPs on Pt(100) films after annealing at TA = 250 °C (as-prepared state) and TA = 400 °C. HRTEM image of annealed Co NPs on Pt(100) film after TA = 500 °C for 30 min. The arrows

Preparation and characterization of supported magnetic nanoparticles prepared by reverse micelles

• Ulf Wiedwald,
• Luyang Han,
• Johannes Biskupek,
• Ute Kaiser and
• Paul Ziemann

Beilstein J. Nanotechnol. 2010, 1, 24–47, doi:10.3762/bjnano.1.5