ore WO 3 nanofibers (140-300 nm in diameter, several hundred mm long) are made by a novel, water-based electrospinning process using ammonium metatungstate (AMT) and polyvinylpyrrolidone (PVP) as precursors. TiO 2 shells (1.5-20 nm) are grown by atomic layer deposition (ALD) using TiCl 4 and water at 2508C. The WO 3 /TiO 2 composite fibers are analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM)-energy dispersive X-ray (EDX), transmission electron microscopy (TEM), Raman spectroscopy (RS), UV-Vis spectroscopy, and X-ray photoelectron spectroscopy (XPS). The optimal photocatalytic conversion under visible light is reached by the WO 3 /1.5 nm TiO 2 nanofibers, which have higher activity compared to bare WO 3 and Degussa TiO 2 . Thicker TiO 2 layers fill the pores of the nanowires and reduce the specific surface area, weakening the photocatalytic activity.

Here we present the first successful attempt to programme the surface properties of nanostructured soft biological tissues by atomic layer deposition (ALD). The nanopatterned surface of lotus leaf was tuned by 3-125 nm TiO 2 thin films. The lotus/TiO 2 composites were studied by SEM-EDX, XPS, Raman, TG-DTA, XRR, water contact angle and photocatalysis measurements. While we could preserve the superhydrophobic feature of lotus, we managed to add a new property, i.e. photocatalytic activity. We also explored how surface passivation 2 treatments and various ALD precursors affect the stability of the sensitive soft biological tissues.As we were able to gradually change the amount of nanopatterns of lotus, we gained new insights into how the hollow organic nanotubes on the surface of lotus influence its superhydrophobic feature.3

The novel biphenyl‐based ligand N,N′,N″,N″′‐tetrakis(2,2′‐bipyridin‐6‐ylmethyl)‐4,4′‐dimethyl‐1,1′‐biphenyl‐2,2′,6,6′‐tetramine (6) with 12 nitrogen donor atoms has been synthesized. Ligand 6 is able to host two metal ions in an octahedral coordination sphere. This was shown by the synthesis of the dinuclear iron(II) complex 5 ([Fe2(6)]4+). Furthermore, the corresponding mononuclear iron(II) complex 4 ([Fe(6)]2+), where one coordination site is free, was obtained. Both FeII complexes show spin‐crossover behaviour, which was shown by 1H NMR spectroscopy and Evans' measurements. A comparison of the two complexes gives evidence of a sterically induced cooperative behaviour in the dinuclear complex 5.

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