New approaches in the design of magnetic tweezers–current magnetic tweezersстатья
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Дата последнего поиска статьи во внешних источниках: 27 августа 2016 г.
Аннотация:The main advantages of the magnetic tweezers are the low price and simplicity of use. However the
range of their application is reduced due to shortcomings like, for example, the remanent induction of
the core and interaction between ferromagnetic cores.
We present the new design of magnetic tweezers-Current Magnetic Tweezers (СМT) that allow
particle manipulation by means of the magnetic field generated by the electric currents flowing through
the non-magnetic wires. Arranging wires in different geometric shapes allows the particle movement
either in two or three dimensions.
Forces acting on the magnetic particles with the magnetic moment of 2 10 ~11A m2 at distances up
to 1 mm had been experimentally measured. It is established that a current of about 1 A at a 1 mm
distance generates force of (approximately) 3 pN which is consistent with theoretical estimates.