Search academic texts

Information × Registration Number 0213U002672, 0110U004522 , R & D reports Title Nanomotors at boundary surfaces popup.stage_title Head Rozenbaum V.M., Registration Date 01-02-2013 Organization Institute of Surface Chemistry of the National Academy of Sciences of Ukraine popup.description2 The research performed for the quasiequilibrium directed motion of particles in the time-dependent periodic potential have shown that high efficiency of energy conversion is reached at the adiabatically fast or slow cyclic changes of potential minima and maxima. In the first case, a Brownian motor works in the reversible regime, a load force is small in the maximum of efficiency, nondiagonal kinetic coefficients are antisymmetric, and the frequency dependence of efficiency is a decreasing function. In the second case, a Brownian motor works in the irreversible regime, a load force in the maximum of efficiency is close to the stopping point, nondiagonal kinetic coefficients are symmetric, and the frequency dependence of efficiency is an increasing function. In the both cases, efficiency exponentially fast tends to unity with increasing amplitude of barriers fluctuations which play a role of a rectification mechanism. On the other hand, the nonadiabatic correction taking into account finite velocity of fast processes limits maximum values of efficiency with increasing amplitude by a power law. Product Description popup.authors Корочкова Т.Є. Розенбаум В.М. popup.nrat_date 2020-04-02 Close