Force trap generated by two counter-directed thermoviscous flow fields with femtoNewton sensitivity (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Force trap generated by two counter-directed thermoviscous flow fields with femtoNewton sensitivity

Caption

(a) Experimental setup: rapid laser scanning induces counter-directed flows on a common axis with a probe particle, giving rise to a stagnation point, where the particle is trapped. (b) Probing the displacement of the trapped particle resulting from the joint application of the optofluidic trap and an external magnetic force of variable magnitude.(c) Quantification of the experiment outlined in (b).(d) Linear relation between force and displacement, revealing a spring constant as small as 35 ± 4 fN/μm.

Credit

by Iliya Dimitrov Stoev and Moritz Kreysing

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Credit must be given to the creator.

License

CC BY

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