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2 article(s) from Ziener, Ulrich

Platinum nanoparticles from size adjusted functional colloidal particles generated by a seeded emulsion polymerization process

Nicolas Vogel,
Ulrich Ziener,
Achim Manzke,
Alfred Plettl,
Paul Ziemann,
Johannes Biskupek,
Clemens K. Weiss and
Katharina Landfester

Beilstein J. Nanotechnol. 2011, 2, 459–472, doi:10.3762/bjnano.2.50

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Scheme 1: Simplified model of a seeded emulsion polymerization process to clarify the desired reaction pathwa...

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Figure 1: Variation of the amount of monomer added to control the resulting size in the seeded emulsion polym...

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Figure 2: Variation of the amount of initiator relative to the amount of added monomer. The dotted lines are ...

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Figure 3: Effect of different concentrations and types of surfactants applied to stabilize the particles in t...

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Figure 4: Effects of the composition of the continuous phase on the seeded polymerization reactions. The dott...

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Figure 5: A non-conventional lithographic process is used to produce arrays of Pt NPs from platinum-acetylace...

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Figure 6: Pt-precursor loaded PS colloids on a Si₃N₄ membrane in the saturated state after exposure to isotro...

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Figure 7: Diameter of Pt-precursor loaded or unloaded PS particles prepared with the surfactants SDS or Luten...

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Figure 8: HRSEM images of particles in the saturated state after 60 min isotropic oxygen plasma treatment. a)...

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Figure 9: Saturated states after plasma etching: a) Closed surface of a seeded 256 nm particle and b) porous ...

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Full Research Paper

Published 18 Aug 2011

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Septipyridines as conformationally controlled substitutes for inaccessible bis(terpyridine)-derived oligopyridines in two-dimensional self-assembly

Daniel Caterbow,
Daniela Künzel,
Michael G. Mavros,
Axel Groß,
Katharina Landfester and
Ulrich Ziener

Beilstein J. Nanotechnol. 2011, 2, 405–415, doi:10.3762/bjnano.2.46

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Figure 1: Nine possible constitutional BTP isomers with the four already described in literature (in red) [6,7] an...

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Scheme 1: Synthetic pathway to BTPs (1–5). i) Cu₂O, isoamylnitrite, benzene, 100 °C, 3 h; ii) (1-ethoxy)-viny...

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Figure 2: The synthetically unavailable 3,2'-BTP (left), which is representative of the other inaccessible BT...

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Scheme 2: Synthetic pathway to PhSpPys (12–16). i) Cu₂O, isoamylnitrite, benzene, 100 °C, 3 h; ii) (1-ethoxy)...

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Figure 3: a) 15 × 15 nm² STM image (I_set = 14 pA, V_set = −0.64 V) of 2,2'-BTP (5) at the HOPG/TCB interface [a...

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Figure 4: Hydrogen bonding motif of 2,2'-BTP (5) (left) and of 2,4'-BTP (2) [6,7] (right) found experimentally; th...

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Figure 5: Adsorbate structures of 2,4'-BTP (2) (left) and 2,2'-BTP (5) (right) in the square symmetric struct...

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Figure 6: a) 15 × 15 nm² STM image (I_set = 3.41 nA, V_set = −660 mV) of 2,2'-PhSpPy (14) at the HOPG/TCB inter...

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Figure 7: a) 15 × 15 nm² STM image (I_set = 14.5 pA, V_set = −610 mV) of 3,3'-PhSpPy (15) at the HOPG/TCB inter...

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Figure 8: Electronic properties for 3,3'-BTP (3) (top) and 3,3'-PhSpPy (15) (bottom). (a) Electrostatic poten...

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Figure 9: a) 16 × 16 nm² STM image (I_set = 2.1 nA, V_set = −0.60 V) of 2,3'-PhSpPy (13) at the HOPG/TCB interf...

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Figure 10: a) 15 × 15 nm² STM image (I_set = 2.51 nA, V_set = −600 mV) of 4,3'-PhSpPy (16) at the HOPG/TCB inter...

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Figure 11: a) 15 × 15 nm² STM image (I_set = 23.5 pA, V_set = −580 mV) of 2,4'-PhSpPy (12) at the HOPG/TCB inter...

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Full Research Paper

Published 26 Jul 2011

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