Results 231 to 240 of about 403,854 (262)
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Single-mode fiber-optical polarization rotator
Applied Optics, 1979A birefringent single-mode optical fiber is twisted mechanically in alternating sense on successive half-wave fiber sections. This arrangement, applicable in-line to a fiber, permits continuous adjustment of the state of polarization at the fiber output.
R, Ulrich, M, Johnson
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Single molecule rotational probing of supercooled liquids
Chem. Soc. Rev., 2014Much of the interesting behavior that has been observed in supercooled liquids appears to be related to dynamic heterogeneity, the presence of distinct dynamic environments - with no apparent underlying structural basis - in these systems. To most directly interrogate these environments, proposed to span regions just a few nanometers across, molecular ...
Keewook, Paeng, Laura J, Kaufman
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Rotation of a Single Molecule Within a Supramolecular Bearing
Science, 1998Experimental visualization and verification of a single-molecule rotor operating within a supramolecular bearing is reported. Using a scanning tunneling microscope, single molecules were observed to exist in one of two spatially defined states laterally separated by 0.26 nanometers. One was identified as a rotating state and the other as an immobilized
Gimzewski, J. +5 more
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Rotational Drag on DNA: A Single Molecule Experiment
Physical Review Letters, 2002Within a single-molecule configuration, we have studied rotational drag on double stranded linear DNA by measuring the force during mechanical opening and closing of the double helix at different rates. The molecule is cranked at one end by the effect of unzipping and is free to rotate at the other end.
Philippe, Thomen +2 more
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Simultaneous Single-Particle Superlocalization and Rotational Tracking
ACS Nano, 2013Superlocalization of single molecules and nanoparticles has become an essential procedure to bring new insights into nanoscale structures and dynamics of biological systems. In the present study, superlocalization is combined with the newly introduced differential interference contrast (DIC) microscopy-based single-particle orientation and rotational ...
Yan, Gu, Gufeng, Wang, Ning, Fang
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Research on Rotation Direction of Single-Axis Rotation FOG SINS
Advanced Materials Research, 2012Rotation direction of single-axis rotation SINS is researched in this paper. The two aspects: one-way, positive and negative rotation and clockwise, counterclockwise rotation are deeply analyzed respectively, and experimental verification is also taken.
Song Tian Shang, Wen Shao Gao
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Inducing and Viewing the Rotational Motion of a Single Molecule
Science, 1998Tunneling electrons from the tip of a scanning tunneling microscope were used to induce and monitor the reversible rotation of single molecules of molecular oxygen among three equivalent orientations on the platinum(111) surface. Detailed studies of the rotation rates indicate a crossover from a single-electron process to a multielectron process below ...
, Stipe, , Rezaei, , Ho
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Superfluid He in Rotation: Single-Vortex Resolution and Requirements on Rotation
Journal of Low Temperature Physics, 2003The present generation of rotating refrigerators, which are used for the study of quantized vorticity in helium superfluids, are often capable of cooling to mK temperatures and rotate up to ∼ 1 rev/s. To achieve single-vortex resolution at all rotation velocities, smooth and stable rotation is required. This calls for low and stable rotational friction,
R. Blaauwgeers +4 more
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Nuclear Collective Rotations and the Single Particle Motion in a Rotating Potential
Annalen der Physik, 1989AbstractThe heavy and medium nuclei with angular high momentum are reconsidered. The study of these nuclei is introduced according to the way of building up the angular momentum. At high angular momentum, the moments of inertia of that nuclei are investigated. A study for the path of the Yrast spectra is given in the deformation space.
A. Ahmed Osman, M. A. Allam
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Single Rotating Molecule-Machines: Nanovehicles and Molecular Motors
2014In the last decade many molecular machines with controlled molecular motions have been synthesized. In the present review chapter we will present and discuss our contribution to the field, in particular through some examples of rotating molecular machines that have been designed, synthesized, and studied in our group.
Rapenne, Gwénaël, Joachim, Christian
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