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2006


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Critical Casimir Effect in 3He-4He Films

Maciolek, A., Dietrich, S.

Europhysics Letters, 74(1):22-28, 2006 (article)

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[BibTex]

2006


[BibTex]


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Pearling instability of nanoscale fluid flow confined to a chemical channel

Koplik, J., Lo, T. S., Rauscher, M., Dietrich, S.

Physics of Fluids, 18, 2006 (article)

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DOI [BibTex]

DOI [BibTex]


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Forces between chemically structured substrates mediated by critical fluids

Sprenger, M., Schlesener, F., Dietrich, S.

The Journal of Chemical Physics, 124, 2006 (article)

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[BibTex]

[BibTex]


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Microscopic theory for interface fluctuations in binary liquid mixtures

Hiester, T., Dietrich, S., Mecke, K.

Journal of Chemical Physics, 125(18), 2006 (article)

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[BibTex]

[BibTex]


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Complete wetting of nanosculptured substrates

Tasinkevych, M., Dietrich, S.

Physical Review Letters, 97(10), 2006 (article)

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[BibTex]

[BibTex]


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Shear viscosity of claylike colloids in computer simulations and experiments

Hecht, M., Harting, J., Bier, M., Reinshagen, J.

Physical Review E, 74(2), 2006 (article)

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[BibTex]

[BibTex]


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On the energetics of protein folding in aqueous solution

Harano, Y., Roth, R., Kinoshita, M.

Chemical Physics Letters, 432, pages: 275-280, 2006 (article)

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[BibTex]

[BibTex]


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Colloidal particles at a nematic-isotropic interface: effects of confinement

West, J. L., Zhang, K., Glushchenko, A., Andrienko, D., Tasinkevych, M., Reznikov, Y.

European Physical Journal E, 20(2):237-242, 2006 (article)

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[BibTex]

[BibTex]


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Depletion potential between large spheres immersed in a multicomponent mixture of small spheres

Roth, R., Kinoshita, M.

The Journal of Chemical Physics, 125, 2006 (article)

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[BibTex]

[BibTex]


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An ultrasonic standing-wave-actuated nano-positioning walking robot: piezoelectric-metal composite beam modeling

Son, K. J., Kartik, V., Wickert, J. A., Sitti, M.

Journal of vibration and control, 12(12):1293-1309, Sage Publications, 2006 (article)

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[BibTex]

[BibTex]


NONLINEAR OPTICAL PROPERTIES OF CHIRAL LIQUIDS Electric-dipolar pseudoscalars in nonlinear optics
NONLINEAR OPTICAL PROPERTIES OF CHIRAL LIQUIDS Electric-dipolar pseudoscalars in nonlinear optics

Fischer, P., Champagne, B.

In NON-LINEAR OPTICAL PROPERTIES OF MATTER: FROM MOLECULES TO CONDENSED PHASES, 1, pages: 359-381, Challenges and Advances in Computational Chemistry and Physics, 2006 (incollection)

Abstract
We give all overview of linear and nonlinear optical processes that can be specific to chiral molecules in isotropic media. Specifically, we discuss the pseudoscalars that underlie nonlinear optical activity and chiral frequency conversion processes in fluids. We show that nonlinear optical techniques open entirely new ways of exploring chirality: Sum-frequency-generation (SFG) at second-order and BioCARS at fourth-order arise in the electric-dipole approximation and do not require circularly polarized light to detect chiral molecules in solution. Here the frequency conversion in itself is a measure of chirality. This is in contrast to natural optical activity phenomena which are based on the interference of radiation from induced oscillating electric and magnetic dipoles, and which are observed as a differential response to right and left circularly polarized light. We give examples from our SFG experiments in optically active solutions and show how the application of an additional static electric field to sum-frequency generation allows the absolute configuration of the chiral solute to be determined via all electric-dipolar process. Results from ab initio calculations of the SFG pseudoscalar are presented for a number of chiral molecules

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[BibTex]

[BibTex]


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Surface properties of fluids of charged platelike colloids

Bier, M., Harnau, L., Dietrich, S.

Journal of Chemical Physics, 125(18), 2006 (article)

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[BibTex]

[BibTex]


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Depletion forces between nonspherical objects

Koenig, P., Roth, R., Dietrich, S.

Physical Review E, 74, 2006 (article)

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[BibTex]

[BibTex]


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Critical dynamics in thin films

Gambassi, A., Dietrich, S.

Journal of Statistical Physics, 123(5):929-1005, 2006 (article)

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[BibTex]

[BibTex]


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Measurement of neutron flux and beam divergence at the cold neutron guide system of the new Munich research reactor FRM-II

Zeitelhack, K., Schanzer, C., Kastenmüller, A., Röhrmoser, A., Daniel, C., Franke, J., Gutsmiedl, E., Kudryashov, V., Maier, D., Päthe, D., Petry, W., Schöffel, T., Schreckenbach, K., Urban, A., Wildgruber, U.

Nuclear Instruments \& Methods in Physics Research A, 560, pages: 444-453, 2006 (article)

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[BibTex]

[BibTex]


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A thin-film model for corotational Jeffreys fluids under strong slip

Münch, A., Wagner, B., Rauscher, M., Blossey, R.

The European Physical Journal e - Soft Matter, 20(4):365-368, 2006 (article)

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DOI [BibTex]

DOI [BibTex]


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Slip-controlled thin-film dynamics

Fetzer, R., Rauscher, M., Münch, A., Wagner, B. A., Jacobs, K.

Europhysics Letters, 75(4):638-644, 2006 (article)

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DOI [BibTex]

DOI [BibTex]


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Capillary evaporation in pores

Roth, R., Kroll, K. M.

Journal of Physics: Condensed Matter, 18, pages: 6517-6530, 2006 (article)

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DOI [BibTex]

DOI [BibTex]


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Density distributions in suspensions flowing around colloidal particles

Krüger, M.

Universität Stuttgart, Stuttgart, 2006 (mastersthesis)

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[BibTex]

[BibTex]


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Step dynamics on vicinal surfaces using discrete interface models

Upton, P. J.

Physical Review E, 73(3), 2006 (article)

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[BibTex]

[BibTex]


Ring-resonator-based frequency-domain optical activity measurements of a chiral liquid
Ring-resonator-based frequency-domain optical activity measurements of a chiral liquid

Vollmer, F., Fischer, P.

OPTICS LETTERS, 31(4):453-455, 2006 (article)

Abstract
Chiral liquids rotate the plane of polarization of linearly polarized light and are therefore optically active. Here we show that optical rotation can be observed in the frequency domain. A chiral liquid introduced in a fiber-loop ring resonator that supports left and right circularly polarized modes gives rise to relative frequency shifts that are a direct measure of the liquid's circular birefringence and hence of its optical activity. The effect is in principle not diminished if the circumference of the ring is reduced. The technique is similarly applicable to refractive index and linear birefringence measurements. (c) 2006 Optical Society of America.

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DOI [BibTex]


Sign of the refractive index in a gain medium with negative permittivity and permeability
Sign of the refractive index in a gain medium with negative permittivity and permeability

Chen, Y., Fischer, P., Wise, F.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 23(1):45-50, 2006 (article)

Abstract
We show how the sign of the refractive index in any medium may be derived using a rigorous analysis based on Einstein causality. In particular, we consider left-handed materials, i.e., media that have negative permittivities and permeabilities at the frequency of interest. We find that the consideration of gain in such media can give rise to a positive refractive index. (c) 2006 Optical Society of America.

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DOI [BibTex]

DOI [BibTex]


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Comment on electrodipping force acting on solid particles at a fluid interface

Oettel, M., Dominguez, A., Dietrich, S.

Langmuir, 22(2):846-847, 2006 (article)

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[BibTex]

[BibTex]


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Grazing-incidence small-angle X-ray scattering from thin polymer films with lamellar structures –the scattering cross section in the distorted-wave Born approximation

Busch, P., Rauscher, M., Smilgies, D.-M., Posselt, D., Papadakis, C. M.

Journal of Applied Crystallography, 39(3):433-442, 2006 (article)

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DOI [BibTex]

DOI [BibTex]


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Diffusion-limited deposition with dipolar interactions: fractal dimension and multifractal structure

Tasinkevych, M., Tavares, J. M., de los Santos, F.

The Journal of Chemical Physics, 124(6), 2006 (article)

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[BibTex]

[BibTex]


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Density functional theory for hard-sphere mixtures: the White Bear version mark II

Hansen-Goos, H., Roth, R.

Journal of Physics: Condensed Matter, 18, pages: 8413-8425, 2006 (article)

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[BibTex]

[BibTex]


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A new generalization of the Carnahan-Starling equation of state to additive mixtures of hard spheres

Hansen-Goos, H., Roth, R.

Journal of Chemical Physics, 124, 2006 (article)

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[BibTex]

[BibTex]


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Slip vs. viscoelasticity in dewetting thin films

Blossey, R., Münch, A., Rauscher, M., Wagner, B.

The European Physical Journal E, 20(3):267-271, 2006 (article)

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DOI [BibTex]

DOI [BibTex]


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Effective triplet interactions in nematic colloids

Tasinkevych, M., Andrienko, D.

European Physical Journal E, 21(3):277-282, 2006 (article)

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[BibTex]

[BibTex]


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IEEE TRANSACTIONS ON ROBOTICS

VOLZ, RICHARD A, TARN, TJ, MACIEJEWSKI, ANTHONY A, LEE, SUKHAN, BICCHI, ANTONIO, DE LUCA, ALESSANDRO, LUH, PETER B, TAYLOR, RUSSELL H, BEKEY, GEORGE A, ARAI, HIROHIKO, others

2006 (article)

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[BibTex]

[BibTex]


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Design methodology for biomimetic propulsion of miniature swimming robots

Behkam, B., Sitti, M.

Trans.-ASME Journal of Dynamic Systems Measurement and Control, 128(1):36, ASME, 2006 (article)

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Project Page [BibTex]

Project Page [BibTex]


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Augmented reality user interface for an atomic force microscope-based nanorobotic system

Vogl, W., Ma, B. K., Sitti, M.

IEEE transactions on nanotechnology, 5(4):397-406, IEEE, 2006 (article)

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[BibTex]

[BibTex]


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Friction enhancement via micro-patterned wet elastomer adhesives on small intestinal surfaces

Kwon, J., Cheung, E., Park, S., Sitti, M.

Biomedical Materials, 1(4):216, IOP Publishing, 2006 (article)

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[BibTex]

[BibTex]


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From Motor Babbling to Purposive Actions: Emerging Self-exploration in a Dynamical Systems Approach to Early Robot Development

Der, R., Martius, G.

In Proc. From Animals to Animats 9, SAB 2006, 4095, pages: 406-421, LNCS, Springer, 2006 (inproceedings)

Abstract
Self-organization and the phenomenon of emergence play an essential role in living systems and form a challenge to artificial life systems. This is not only because systems become more lifelike, but also since self-organization may help in reducing the design efforts in creating complex behavior systems. The present paper studies self-exploration based on a general approach to the self-organization of behavior, which has been developed and tested in various examples in recent years. This is a step towards autonomous early robot development. We consider agents under the close sensorimotor coupling paradigm with a certain cognitive ability realized by an internal forward model. Starting from tabula rasa initial conditions we overcome the bootstrapping problem and show emerging self-exploration. Apart from that, we analyze the effect of limited actions, which lead to deprivation of the world model. We show that our paradigm explicitly avoids this by producing purposive actions in a natural way. Examples are given using a simulated simple wheeled robot and a spherical robot driven by shifting internal masses.

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[BibTex]

[BibTex]


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Statistical Learning of LQG controllers

Theodorou, E.

Technical Report-2006-1, Computational Action and Vision Lab University of Minnesota, 2006, clmc (techreport)

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PDF [BibTex]

PDF [BibTex]


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Ab-initio calculations: I. Basic principles of the density functional electron theory and combination with phenomenological theories

Fähnle, M.

In Structural defects in ordered alloys and intermetallics. Characterization and modelling, pages: IX-1-IX-10, COST and CNRS, Bonascre [Ariege, France], 2006 (inproceedings)

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[BibTex]

[BibTex]


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Influence of the substrate on the magnetic anisotropy of monatomic wires

Komelj, M., Steiauf, D., Fähnle, M.

{Physical Review B}, 73, 2006 (article)

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[BibTex]

[BibTex]


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Mechanical properties of single-walled carbon nanotubes based on higher order Cauchy-Born rule

Guo, X., Wang, J. B., Zhang, H. W.

{International Journal of Solids and Structures}, 43, pages: 1276-1290, 2006 (article)

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[BibTex]

[BibTex]


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Vanishing Fe 3d orbital moments in single-crystalline magnetite

Goering, E., Gold, S., Lafkioti, M., Schütz, G.

{Europhysics Letters}, 73(1):97-103, 2006 (article)

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[BibTex]

[BibTex]


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Enhancement of L10 phase formation in FePt nanoparticles by nitrogenization

Dmitrieva, O., Acet, M., Dumpich, G., Kästner, J., Antoniak, C., Farle, M., Fauth, K.

{Journal of Physics D}, 39, pages: 4741-4745, 2006 (article)

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[BibTex]

[BibTex]


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Hard magnetic FePt thin films and nanostructures in L1(0) phases

Goll, D., Breitling, A., Goo, N. H., Sigle, W., Hirscher, M., Schütz, G.

In 13, pages: 97-101, Beijing, PR China, 2006 (inproceedings)

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[BibTex]

[BibTex]


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Structure of historical brass tonques and shallots from baroque organs

Baretzky, B., Friesel, M., Petelin, A., Mazilkin, A., Straumal, B.

{Defect and Diffusion Forum}, 249, pages: 275-280, 2006 (article)

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[BibTex]

[BibTex]


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Three-dimensional modeling of mechanical forces in the extra-cellular matrix during epithelial lumen formation

Zeng, D., Ferrari, A., Ulmer, J., Veligodskiy, A., Fischer, P., Spatz, J. P., Ventikos, Y., Poulikakos, D., Kroschewski, R.

{Biophysical Journal}, 90(12):4380-4391, 2006 (article)

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[BibTex]

[BibTex]


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Dynamic Hebbian learning in adaptive frequency oscillators

Righetti, L., Buchli, J., Ijspeert, A.

Physica D: Nonlinear Phenomena, 216(2):269-281, 2006 (article)

Abstract
Nonlinear oscillators are widely used in biology, physics and engineering for modeling and control. They are interesting because of their synchronization properties when coupled to other dynamical systems. In this paper, we propose a learning rule for oscillators which adapts their frequency to the frequency of any periodic or pseudo-periodic input signal. Learning is done in a dynamic way: it is part of the dynamical system and not an offline process. An interesting property of our model is that it is easily generalizable to a large class of oscillators, from phase oscillators to relaxation oscillators and strange attractors with a generic learning rule. One major feature of our learning rule is that the oscillators constructed can adapt their frequency without any signal processing or the need to specify a time window or similar free parameters. All the processing is embedded in the dynamics of the adaptive oscillator. The convergence of the learning is proved for the Hopf oscillator, then numerical experiments are carried out to explore the learning capabilities of the system. Finally, we generalize the learning rule to non-harmonic oscillators like relaxation oscillators and strange attractors.

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link (url) DOI [BibTex]

link (url) DOI [BibTex]


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Miniature endoscopic capsule robot using biomimetic micro-patterned adhesives

Karagozler, M. E., Cheung, E., Kwon, J., Sitti, M.

In Biomedical Robotics and Biomechatronics, 2006. BioRob 2006. The First IEEE/RAS-EMBS International Conference on, pages: 105-111, 2006 (inproceedings)

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[BibTex]

[BibTex]


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Compliant and low-cost humidity nanosensors using nanoporous polymer membranes

Yang, B., Aksak, B., Lin, Q., Sitti, M.

Sensors and Actuators B: Chemical, 114(1):254-262, Elsevier, 2006 (article)

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[BibTex]

[BibTex]


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Task-based and stable telenanomanipulation in a nanoscale virtual environment

Kim, S., Sitti, M.

IEEE Transactions on automation science and engineering, 3(3):240-247, IEEE, 2006 (article)

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[BibTex]

[BibTex]


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Drawing suspended polymer micro-/nanofibers using glass micropipettes

Nain, A. S., Wong, J. C., Amon, C., Sitti, M.

Applied Physics Letters, 89(18):183105, AIP, 2006 (article)

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[BibTex]

[BibTex]