Cell growth and division has been of scientists’ interest for over generations. Several mathematical models have been reported derived from conventional method of cell culture. Here we applied optical tweezers to guide cell division directionally. The patterns of Saccharonmyces bayanus yeast growth was studied under 1064 nm line optical tweezers generated by time-shared multiple optical traps. Yeast growth was found following the path of the generated laser patterns in linear, circular, square and L shapes, speculatively as a result of localized heating effect due to absorption at the focal point.
Chiral Phospholipids are found self-assembled into fascinating cylindrical tubules of 500 nm in diameter by helical
winding of bilayer stripes under cooling in ethanol and water solution. Theoretical prediction and experimental evidence
reported so far confirmed the modulated tilt direction in a helical striped pattern of the tubules. This molecular
orientation morphology results in optically birefringent tubules. We manipulated birefringent lipid tubules under 532 nm
linearly polarized laser tweezers. Spontaneous rotation of lipid tubules induced by radiation torque was observed with
only one sense of rotation caused by chirality of lipid tubules. Rotation discontinues once the high index axis of lipid
tubule aligned with a polarization axis of the laser. Thus, by controlling the direction of linearly polarized light, angle of
tubule rotation can be specified. This observation holds promising applications in nano- and bio-technologies.