Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes

• Ravi Joshi,
• Benjamin Waldschmidt,
• Jörg Engstler,
• Rolf Schäfer and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2011, 2, 734–739, doi:10.3762/bjnano.2.80

• all of the formed oxide species that are accumulated. A 10 nm Al layer was deposited prior to cluster deposition on the SiOx grid. This thin Al barrier layer later ensures CNT growth [12]. Sintering of the iron catalyst during heating is minimized due to the low Tammann temperature of aluminium (194

• °C), which prevents the iron particles from agglomeration and hence providing a good aluminium–iron interaction. Moreover, the deposited Al layer is also partially oxidized on top of the SiOx grid surface [12] and forms a stable alumina–catalyst interface, which stabilizes the deposited iron clusters

• application of a high voltage pulse to the 90° mirror, which was aligned to the target (11). The incident energy of the mass-selected clusters was 2550 eV with an energy spread of approximately 150 eV (FWHM). Chemical vapour deposition of CNTs A 10 nm thick aluminium buffer layer was deposited by means of

The effect of surface anisotropy in the slippery zone of Nepenthes alata pitchers on beetle attachment

• Elena V. Gorb and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2011, 2, 302–310, doi:10.3762/bjnano.2.35

• beetles were studied in the SEM at an acceleration voltage of 3 kV. For this purpose, insects were air-dried, mounted with their dorsal side to aluminium holders, sputter-coated with gold-palladium (thickness 6 nm), and examined in SEM, as described above. The diameter of the claw tip (D) was estimated

Infrared receptors in pyrophilous (“fire loving”) insects as model for new un-cooled infrared sensors

• David Klocke,
• Anke Schmitz,
• Helmut Soltner,
• Herbert Bousack and
• Helmut Schmitz

Beilstein J. Nanotechnol. 2011, 2, 186–197, doi:10.3762/bjnano.2.22

• have a significant lower absorption coefficient which requires the application of an additional absorber such as plastic, aluminium, antimony or lead [21]. When the absorbing film is directly on the inner surface of the window, the assumption of a boundary layer as in the case of water is valid