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2009


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Full phase and amplitude control in computer-generated holography

Fratz, M., Fischer, P., Giel, D. M.

OPTICS LETTERS, 34(23):3659-3661, 2009 (article)

Abstract
We report what we believe to be the first realization of a computer-generated complex-valued hologram recorded in a single film of photoactive polymer. Complex-valued holograms give rise to a diffracted optical field with control over its amplitude and phase. The holograms are generated by a one-step direct laser writing process in which a spatial light modulator (SLM) is imaged onto a polymer film. Temporal modulation of the SLM during exposure controls both the strength of the induced birefringence and the orientation of the fast axis. We demonstrate that complex holograms can be used to impart arbitrary amplitude and phase profiles onto a beam and thereby open new possibilities in the control of optical beams. (C) 2009 Optical Society of America

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2009


[BibTex]


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Digital polarization holograms with defined magnitude and orientation of each pixel’s birefringence

Fratz, M., Giel, D. M., Fischer, P.

OPTICS LETTERS, 34(8):1270-1272, 2009 (article)

Abstract
A new form of digital polarization holography is demonstrated that permits both the amplitude and the phase of a diffracted beam to be independently controlled. This permits two independent intensity images to be stored in the same hologram. To fabricate the holograms, a birefringence with defined retardance and orientation of the fast axis is recorded into a photopolymer film. The holograms are selectively read out by choosing the polarization state of the read beam. Polarization holograms of this kind increase the data density in holographic data storage and allow higher quality diffractive optical elements to be written. (C) 2009 Optical Society of America

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Controlled Propulsion of Artificial Magnetic Nanostructured Propellers

Ghosh, A., Fischer, P.

NANO LETTERS, 9(6):2243-2245, 2009, Featured highlight ‘Nanotechnology: The helix that delivers’ Nature 459, 13 (2009). (article)

Abstract
For biomedical applications, such as targeted drug delivery and microsurgery, it is essential to develop a system of swimmers that can be propelled wirelessly in fluidic environments with good control. Here, we report the construction and operation of chiral colloidal propellers that can be navigated in water with micrometer-level precision using homogeneous magnetic fields. The propellers are made via nanostructured surfaces and can be produced in large numbers. The nanopropellers can carry chemicals, push loads, and act as local probes in rheological measurements.

Featured highlight ‘Nanotechnology: The helix that delivers’ Nature 459, 13 (2009).

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Video - Nanospropellers DOI [BibTex]

Video - Nanospropellers DOI [BibTex]


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Absolute Asymmetric Reduction Based on the Relative Orientation of Achiral Reactants

Kuhn, A., Fischer, P.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 48(37):6857-6860, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Magnetic mobile micro-robots

Pawashe, C., Floyd, S., Sitti, M.

7eme Journees Nationales de la Recherche en Robotique, 2009 (article)

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Gecko-Inspired Directional and Controllable Adhesion

Murphy, M. P., Aksak, B., Sitti, M.

Small, 5(2):170-175, WILEY-VCH Verlag, 2009 (article)

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Project Page [BibTex]

Project Page [BibTex]


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Multiple magnetic microrobot control using electrostatic anchoring

Pawashe, C., Floyd, S., Sitti, M.

Applied Physics Letters, 94(16):164108, AIP, 2009 (article)

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[BibTex]

[BibTex]


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Characterization of bacterial actuation of micro-objects

Behkam, B., Sitti, M.

In Robotics and Automation, 2009. ICRA’09. IEEE International Conference on, pages: 1022-1027, 2009 (inproceedings)

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[BibTex]

[BibTex]


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Wet self-cleaning of biologically inspired elastomer mushroom shaped microfibrillar adhesives

Kim, S., Cheung, E., Sitti, M.

Langmuir, 25(13):7196-7199, ACS Publications, 2009 (article)

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[BibTex]


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Compliant footpad design analysis for a bio-inspired quadruped amphibious robot

Park, H. S., Sitti, M.

In Intelligent Robots and Systems, 2009. IROS 2009. IEEE/RSJ International Conference on, pages: 645-651, 2009 (inproceedings)

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[BibTex]


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One-dimensional phthalocyanine nanostructures directed by gold templates

Krauss, T. N., Barrena, E., Lohmüller, T., Kelsch, M., Breitling, A., Van Aken, P. A., Spatz, J., Dosch, H.

{Chemistry of Materials}, 21, pages: 5010-5015, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Magnetische L10-FePt Nanostrukturen für höchste Datenspeicherdichten

Breitling, A.

Universität Stuttgart, Stuttgart, 2009 (phdthesis)

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[BibTex]


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Near-edge X-ray absorption fine-structure microscopy of organic and magnetic materials

Ade, H., Stoll, H.

{Nature Materials}, 8, pages: 281-290, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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X-ray imaging of the dynamic magnetic vortex core deformation

Vansteenkiste, A., Chou, K. W., Weigand, M., Curcic, M., Sackmann, V., Stoll, H., Tyliszczak, T., Woltersdorf, G., Back, C. H., Schütz, G., Van Waeyenberge, B.

{Nature Physics}, 5, pages: 332-334, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Order\textendashdisorder transition and valence state of ytterbium in YbAuxGa2-x(0.26 \textless\textequalsx \textless\textequals1.31)

Gumeniuk, R., Bischoff, E., Burkhardt, U., Prots, Y., Schnelle, W., Vasylechko, L., Schmidt, M., Kuzma, Y., Grin, Y.

{Journal of Solid State Chemistry}, 182(12):3374-3382, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Coercivity of ledge-type L10-FePt/Fe nanocomposites with perpendicular magnetization

Goll, D., Breitling, A.

{Applied Physics Letters}, 94, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Time-resolved X-ray microscopy of nanoparticle aggregates under oscillatory shear

Auernhammer, G. K., Fauth, K., Ullrich, B., Zhao, J., Weigand, M., Vollmer, D.

{Journal of Synchrotron Radiation}, 16, pages: 307-309, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Micromagnetism of advanced hard magnetic materials

Kronmüller, H., Goll, D.

{International Journal of Materials Research}, 100, pages: 640-651, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Confinement of MgH2 nanoclusters within nanoporous aerogel scaffold materials

Nielsen, T. K., Manickam, K., Hirscher, M., Besenbacher, F., Jensen, T. R.

{American Chemical Society Nano}, 3(11):3521-3528, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Possible definition of atom- and bond-resolved contributions to the magnetocrystalline anisotropy energy

Subkow, S., Fähnle, M.

{Physical Review B}, 80, 2009 (article)

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DOI [BibTex]


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A novel artificial hair receptor based on aligned PVDF micro/nano fibers

Weiting, Liu, Bilsay, Sumer, Cesare, Stefanini, Arianna, Menciassi, Fei, Li, Dajing, Chen, Paolo, Dario, Metin, Sitti, Xin, Fu

In Robotics and Biomimetics, 2008. ROBIO 2008. IEEE International Conference on, pages: 49-54, 2009 (inproceedings)

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[BibTex]


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Robot ceiling climbers harness new tricks

Marks, Paul

New Scientist, 202(2705):18-19, Reed Business Information, 2009 (article)

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[BibTex]


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Waalbot: Agile climbing with synthetic fibrillar dry adhesives

Murphy, M. P., Sitti, M.

In Robotics and Automation, 2009. ICRA’09. IEEE International Conference on, pages: 1599-1600, 2009 (inproceedings)

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[BibTex]


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Biologically-Inspired Patterned and Coated Adhesives for Medical Devices

Glass, P, Chung, H, Lee, C, Tworkoski, E, Washburn, NR, Sitti, M

Journal of Medical Devices, 3(2):027537, American Society of Mechanical Engineers, 2009 (article)

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[BibTex]


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Modeling and experimental characterization of an untethered magnetic micro-robot

Pawashe, C., Floyd, S., Sitti, M.

The International Journal of Robotics Research, 28(8):1077-1094, Sage Publications, 2009 (article)

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[BibTex]

[BibTex]


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Towards automated nanoassembly with the atomic force microscope: A versatile drift compensation procedure

Krohs, F., Onal, C., Sitti, M., Fatikow, S.

Journal of Dynamic Systems, Measurement, and Control, 131(6):061106, American Society of Mechanical Engineers, 2009 (article)

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[BibTex]


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Ab-initio Elliott-Yafet modeling of ultrafast demagnetization after laser irradiation

Illg, C.

Universität Stuttgart, Stuttgart, 2009 (mastersthesis)

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Element specific investigation of the magnetization profile at the CrO2/RuO2 interface

Zafar, K.

Universität Stuttgart, Stuttgart, 2009 (mastersthesis)

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Complex magnetic phase in submonolayer Fe stripes on Pt(977)

Honolka, J., Lee, T. Y., Kuhnke, K., Repetto, D., Sessi, V., Wahl, P., Buchsbaum, A., Varga, P., Gardonio, S., Carbone, C., Krishnakumar, S. R., Gambardella, P., Komelj, M., Singer, R., Fähnle, M., Fauth, K., Schütz, G., Enders, A., Kern, K.

{Physical Review B}, 79, 2009 (article)

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DOI [BibTex]


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Local and nonlocal atomic contributions to unit-cell damping in near-adiabatic collinear magnetization dynamics

Seib, J., Steiauf, D., Fähnle, M.

{Physical Review B}, 79, 2009 (article)

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DOI [BibTex]


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Temperature-dependent critical currents in superconducting YBa2Cu3O7-δand ferromagnetic La2/3Ca1/3MnO3 hybrid structures

Djupmyr, M., Soltan, S., Habermeier, H.-U., Albrecht, J.

{Physical Review B}, 80, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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High surface area polyHIPEs with hierarchical pore system

Schwab, M. G., Senkovska, I., Rose, M., Klein, N., Koch, M., Pahnke, J., Jonschker, G., Schmitz, B., Hirscher, M., Kaskel, S.

{Soft Matter}, 5, pages: 1055-1059, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Grain boundary wetting phase transformations in the Zn-Sn and Zn-In systems

Gornakova, A. S., Straumal, B. B., Tsurekawa, S., Chang, L.-S., Nekrasov, A. N.

{Reviews on Advanced Materials Science}, 21(1):18-26, 2009 (article)

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Magnetization study of nanograined pure and Mn-doped ZnO films: formation of a ferromagnetic grain-boundary foam

Straumal, B. B., Mazilkin, A. A., Protasova, S. G., Myatiev, A. A., Straumal, P. B., Schütz, G., van Aken, P. A., Goering, E., Baretzky, B.

{Physical Review B}, 79, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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In situ synthesis and hydrogen storage properties of PdNi alloy nanoparticles in an ordered mesoporous carbon template

Campesi, R., Cuevas, F., Leroy, E., Hirscher, M., Gadiou, R., Vix-Guterl, C., Latroche, M.

{Microporous and Mesoporous Materials}, 117, pages: 511-514, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Enhanced adhesion by gecko-inspired hierarchical fibrillar adhesives

Murphy, M. P., Kim, S., Sitti, M.

ACS applied materials \& interfaces, 1(4):849-855, American Chemical Society, 2009 (article)

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Project Page [BibTex]

Project Page [BibTex]


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Miniature devices: Voyage of the microrobots

Sitti, M.

Nature, 458(7242):1121-1122, Nature Publishing Group, 2009 (article)

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Piezoelectric ultrasonic resonant micromotor with a volume of less than 1 mm 3 for use in medical microbots

Watson, B., Friend, J., Yeo, L., Sitti, M.

In Robotics and Automation, 2009. ICRA’09. IEEE International Conference on, pages: 2225-2230, 2009 (inproceedings)

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[BibTex]


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Dynamic modeling and analysis of pitch motion of a basilisk lizard inspired quadruped robot running on water

Park, H. S., Floyd, S., Sitti, M.

In Robotics and Automation, 2009. ICRA’09. IEEE International Conference on, pages: 2655-2660, 2009 (inproceedings)

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Dry spinning based spinneret based tunable engineered parameters (STEP) technique for controlled and aligned deposition of polymeric nanofibers

Nain, A. S., Sitti, M., Jacobson, A., Kowalewski, T., Amon, C.

Macromolecular rapid communications, 30(16):1406-1412, WILEY-VCH Verlag, 2009 (article)

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Two-dimensional contact and noncontact micromanipulation in liquid using an untethered mobile magnetic microrobot

Floyd, S., Pawashe, C., Sitti, M.

IEEE Transactions on Robotics, 25(6):1332-1342, IEEE, 2009 (article)

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[BibTex]


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Mit Röntgenblitzen zu neuen Erkenntnissen

Hedderich, R., Weigand, M., Baretzky, B.

{Nanotechnik - Molek\"ule Materialien Mikrosysteme}, (6 (Beilage zu Photonik 41. 2009)), 2009 (article)

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[BibTex]


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Magnetic resonant reflectometry on exchange bias systems

Brück, S.

Universität Stuttgart, Stuttgart, 2009 (phdthesis)

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link (url) [BibTex]

link (url) [BibTex]


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Second-order faceting-roughening of the tilt grain boundary in zinc

Straumal, B. B., Gornakova, A. S., Sursaeva, V. G., Yashnikov, V. P.

{International Journal of Materials Research}, 100(4):525-529, 2009 (article)

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DOI [BibTex]

DOI [BibTex]


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Improvement of interface structure and magnetic properties of Co on Si (100) by surfactant (Sb) mediated growth

Dash, S. P., Goll, D., Carstanjen, H. D.

{Applied Physics A}, 97(3):651-656, 2009 (article)

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DOI [BibTex]


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Effect of severe plastic deformation on the coercivity of Co-Cu alloys

Straumal, B. B., Protasova, S. G., Mazilkin, A. A., Baretzky, B., Goll, D., Gunderov, D. V., Valiev, R. Z.

{Philosophical Magazine Letters}, 89(10):649-654, 2009 (article)

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DOI [BibTex]


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Magnetic properties of cobalt-covered MgB2 films

Treiber, S., Stuhlhofer, B., Habermeier, H.-U., Albrecht, J.

{Superconductor Science and Technology}, 22, 2009 (article)

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DOI [BibTex]


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Reconstruction of historic alloys for pipe organs brings true Baroque music back to life

Baretzky, B., Friesel, M., Straumal, B.

{Japan Organist}, 36, pages: 29-38, 2009 (article)

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[BibTex]

[BibTex]


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Exchange-coupled L10-FePt/Fe composite patterns with perpendicular magnetization

Breitling, A., Bublat, T., Goll, D.

{Physica Status Solidi - Rapid Research Letters}, 3(5):130-132, 2009 (article)

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DOI [BibTex]

DOI [BibTex]