Research Article

Determination of the Strength of Adhesion between Lipid Vesicles

Figure 2

Phase contrast microscope image of the two adhering giant phospholipid vesicles (with radii of approx. 30 μm). The 𝑦 -axis denotes the symmetry axis and the 𝑥 -axis the contact plane. Points A, B1, and B2 are to be located to measure the adhesion angle 𝜑 a between lines A B 1 and A B 2 . The adhesion angle can be obtained also from measuring lengths: 𝜑 a = a r c t a n 𝑀 1 + a r c t a n 𝑀 2 , where 𝑀 1 = B 1 C 1 / A C 1 , 𝑀 2 = B 2 C 2 / A C 2 , and points 𝐶 1 and 𝐶 2 are projections of points 𝐵 1 and 𝐵 2 to the contact plane.
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