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We excite diatomic oxygen and nitrogen to high rotational states with an optical centrifuge and study their dynamics in external magnetic field. Ion imaging is employed to directly visualize, and follow in time, the rotation plane of…

Chemical Physics · Physics 2015-04-08 Aleksey Korobenko , Valery Milner

In this paper we demonstrate how asymmetric molecular rotational spectra may be introduced to students both "pictorially" and with simple formulae. It is shown that the interpretation of such spectra relies heavily upon pattern recognition.…

Physics Education · Physics 2012-04-17 S. A. Cooke , P. Ohring

We examine the dependence of the physical quantities of the rotatory molecular motor, such as the rotation velocity and the proton translocation rate, on the chemical reaction rate using the model based only on diffusion process. A peculiar…

Biological Physics · Physics 2009-11-10 Hiroshi Miki , Masatoshi Sato , Mahito Kohmoto

The pathway toward the tailored synthesis of materials starts with precise characterization of the conformational properties and dynamics of individual molecules. Electron spin resonance based scanning tunneling microscopy can potentially…

We examine the potential-energy curves and polarization of the dipole moments of two static polar molecules under the influence of an external dc electric field and their anisotropic dipole-dipole interaction. We model the molecules as…

Quantum Physics · Physics 2024-09-24 Felipe Isaule , Robert Bennett , Jörg B. Götte

The dynamics of a spherical chemically-powered synthetic colloidal motor that operates by a self-diffusiophoretic mechanism and has a catalytic domain of arbitrary shape is studied using both continuum theory and particle-based simulations.…

Soft Condensed Matter · Physics 2019-12-17 Shang Yik Reigh , Mu-Jie Huang , Hartmut Löwen , Eric Lauga , Raymond Kapral

Quantum Monte Carlo is an efficient technique for finding the ground-state energy and related properties of small molecules. A major challenge remains in accurate determination of a molecule's geometry, i.e. the optimal location of its…

Computational Physics · Physics 2017-04-12 Jan Vrbik

Quantum tracking control aims to identify applied fields to steer the expectation values of particular observables along desired paths in time. The associated temporal fields can be identified by inverting the underlying dynamical equations…

Quantum Physics · Physics 2018-10-31 Alicia Magann , Tak-San Ho , Herschel Rabitz

Controlling electronic transport through a single-molecule junction is crucial for molecular electronics or spintronics. In magnetic molecular devices, the spin degree-of-freedom can be used to this end since the magnetic properties of the…

Azophenine has previously been identified as a controllable molecular switch when deposited on a Cu(110) surface, where it can be in two symmetry-equivalent states. Each of the two states can be set as well as read by means of a scanning…

Atomic and Molecular Clusters · Physics 2018-01-04 Herbert Fruchtl , Tanja van Mourik

Efficient detection of harmful organic volatile compounds is a major health and environmental need in industrialized societies. Tailor-made metal-organic frameworks and other coordination polymers are emerging as promising sensing molecular…

Quantum sensing is a key component of quantum technology, enabling highly sensitive magnetometry. We combined a nickelocene molecule with scanning tunneling microscopy to perform versatile spin sensing of magnetic surfaces, namely of model…

Mesoscale and Nanoscale Physics · Physics 2023-11-27 A. Fétida , O. Bengone , M. Romeo , F. Scheurer , R. Robles , N. Lorente , L. Limot

Linear bio-molecular motors move unidirectionally along a track by coordinating several different processes, such as fuel (ATP) capture, hydrolysis, conformational changes, binding and unbinding from a track, and center-of-mass diffusion. A…

Statistical Mechanics · Physics 2015-05-18 Nathan J. Kuwada , Gerhard A. Blab , Heiner Linke

Molecular spintronics is recognized to as an attractive new research direction in a field of spintronics, following to metallic spintronics and inorganic semiconductor spintronics, and attracts many people in recent decades. The purpose of…

Materials Science · Physics 2015-05-27 Masashi Shiraishi , Tadaaki Ikoma

In this Letter we suggest a new method of manipulating individual molecules with scanning probes using a "pick-up-and put-down" mode. We demonstrate that the number of molecules picked up by the tip and deposited in a different location can…

Soft Condensed Matter · Physics 2015-06-24 O. Dudko , A. E. Filippov , J. Klafter , M. Urbakh

Large molecules have complex potential-energy surfaces with many local minima. They exhibit multiple stereo-isomers, even at very low temperatures. In this paper we discuss the different approaches for the manipulation of the motion of…

Atomic Physics · Physics 2009-09-09 Jochen Küpper , Frank Filsinger , Gerard Meijer

We develop a theoretical model for how organic molecules can control the electronic and transport properties of an underlying transistor channel to whose surface they are chemically bonded. The influence arises from a combination of…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Smitha Vasudevan , Neeti Kapur , Tao He , Matthew Neurock , James M. Tour , Avik W. Ghosh

The determination of chemical mixture components is vital to a multitude of scientific fields. Oftentimes spectroscopic methods are employed to decipher the composition of these mixtures. However, the sheer density of spectral features…

Astrophysics of Galaxies · Physics 2024-08-29 Zachary T. P. Fried , Brett A. McGuire

We provide a way of generating and observing molecular quantum gyroscopic motion that resembles gyroscopic motion of classical rotors. After producing a nonspreading rotational wavepacket called a cogwheel state, one can generate a…

Quantum Physics · Physics 2015-06-24 Sang Jae Yun , Chang Hee Nam

The addition of individual quanta of rotational excitation to a molecule has been shown to markedly change its reactivity by significantly modifying the intermolecular interactions. So far, it has only been possible to observe these…

Chemical Physics · Physics 2024-03-06 Jutta Toscano
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