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4 Apr 2005

Volume 86, Issue 14, Articles (14xxxx)

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Appl. Phys. Lett. 86, 142101 (2005); http://dx.doi.org/10.1063/1.1895476 (3 pages)

M. Hanke, T. Boeck, A.-K. Gerlitzke, F. Syrowatka, F. Heyroth, and R. Köhler
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Is the lotus leaf superhydrophobic?

Yang-Tse Cheng and Daniel E. Rodak

Appl. Phys. Lett. 86, 144101 (2005); http://dx.doi.org/10.1063/1.1895487 (3 pages) | Cited 129 times

Online Publication Date: 30 March 2005

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Superhydrophobic surfaces have important technical applications ranging from self-cleaning window glasses, paints, and fabrics to low-friction surfaces. The archetype superhydrophobic surface is that of the lotus leaf. When rain falls on lotus leaves, water beads up with a contact angle in the superhydrophobic range of about 160°. The water drops promptly roll off the leaves collecting dirt along the way. This lotus effect has, in recent years, stimulated much research effort worldwide in the fabrication of surfaces with superhydrophobicity. But, is the lotus surface truly superhydrophobic? This work shows that the lotus leaves can be either hydrophobic or hydrophilic, depending on how the water gets on to their surfaces. This finding has significant ramifications on how to make and use superhydrophobic surfaces.
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68.03.Fg Evaporation and condensation of liquids
68.08.Bc Wetting

Polycapillary optics for energy dispersive micro x-ray diffractometry

A. Bjeoumikhov, S. Bjeoumikhova, N. Langhoff, and R. Wedell

Appl. Phys. Lett. 86, 144102 (2005); http://dx.doi.org/10.1063/1.1897441 (3 pages) | Cited 8 times

Online Publication Date: 31 March 2005

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Energy dispersive microdiffractometry can be carried out using a microfocus x-ray source coupled to a polycapillary lens, which provides an 8000-fold intensity gain. As result this letter shows the orientation of molybdenum microcrystallites over a square area of 4 mm2 with a spatial resolution of 50 μm.
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82.80.Ej X-ray, Mössbauer, and other γ-ray spectroscopic analysis methods
82.80.Pv Electron spectroscopy (X-ray photoelectron (XPS), Auger electron spectroscopy (AES), etc.)
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