Mats Jonson

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Nowadays, liquid applications of quartz crystal microbalance (QCM) opened a way for in situ studies of proteins, vesicles and cells adsorbed from the solution onto the QCM surface. The sensitivity of QCM to the viscoelasticity of the adsorbed biomaterial can be a reason of the experimentally observed deviation from a linear dependence of QCM resonant(More)
AIMS To investigate the effect of freeze-dried Lactobacillus coryniformis Si3 on storage stability by adding polymers to sucrose-based formulations and to examine the relationship between amorphous matrix stability and cell viability. METHODS AND RESULTS The resistance to moisture-induced sucrose crystallization and effects on the glass transition(More)
Superconducting circuits that incorporate Josephson junctions are of considerable experimental and theoretical interest, particularly in the context of quantum computing. A nanometre-sized superconducting grain (commonly referred to as a Cooper-pair box) connected to a reservoir by a Josephson junction is an important example of such a system. Although the(More)
We discuss the interaction of a tunneling electron with its electromagnetic environment|when the latter either is in equilibrium or includes an applied microwave eld. The environment of an isolated tunnel junction is modeled by a set of harmonic oscillators that are suddenly displaced when an electron tunnels across the junction. We treat these displaced(More)
The dynamics of amphiphilic films deposited on a solid surface is analyzed for the case when shear oscillations of the solid surface are excited. The two cases of surface-and bulk shear waves are studied with the film exposed to gas or to a liquid. By solving the corresponding dispersion equation and the wave equation while maintaining the energy balance we(More)
An analytical analysis of quantum shuttle phenomena in a nanoelectromechanical single-electron transistor has been performed in the realistic case, when the electron tunneling length is much greater than the amplitude of the zero point oscillations of the central island. It is shown that when the dissipation is below a certain threshold value, the(More)
We demonstrate that it is possible to manipulate the magnetic coupling between two nanomagnets by means of an ac electric field. In the scheme suggested, the magnetic coupling is mediated by a magnetic particle that is in contact with both nanomagnets via tunnel barriers. The time-dependent electric field is applied so that the height of first one barrier(More)
PACS. 73.63.-b – Electronic transport in mesoscopic or nanoscale materials and structures.. PACS. 73.23.Hk – Coulomb blockade; single-electron tunneling. PACS. 85.85.+j – Micro-and nano-electromechanical systems (MEMS/NEMS) and devices. Abstract. – Effects of a coupling between the mechanical vibrations of a quantum dot placed between the two leads of a(More)
We consider effects of the spin degree of freedom on the nanomechanics of a single-electron transistor (SET) containing a nanometer-sized metallic cluster suspended between two magnetic leads. It is shown that in such a nanoelectromechanical SET (NEM-SET) the onset of an electromechanical instability leading to cluster vibrations and shuttle transport of(More)