Demonstration of MT sorting by integrating the top-down design of PDMS device with the bottom-up design of MT properties. Demonstration of MT sorting by.

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Presentation transcript:

Demonstration of MT sorting by integrating the top-down design of PDMS device with the bottom-up design of MT properties. Demonstration of MT sorting by integrating the top-down design of PDMS device with the bottom-up design of MT properties. (A) Schematic representation of the PDMS device. The device consisted of three areas: MT landing area (between reservoirs C and D), MT sorting area (between reservoirs A and B), and MT alignment area (between MT landing and sorting areas). Channels in the alignment area were 40 μm in length and 5 μm in width. The channel height was 10 μm. (B) Image of the fabricated PDMS device. Red ink indicates the channels. Scale bar, 3 mm. (C) Bright-field image of the cross section of MT landing, MT alignment, and MT sorting areas. Channels are filled with ink without leakage. Scale bar, 50 μm. (D) Sequential images of MT immobilization in the MT landing area. Flow generated by pressure differences among reservoirs prevented MTs from escaping to the MT alignment area. White solid lines represent the wall. Scale bar, 20 μm. Fluorescent images of MTs in (E) the MT landing area and (F) MT alignment area. Scale bar, 20 μm. Histograms of MT orientation angles in (G) MT landing (n = 70) and (H) MT alignment areas (n = 35). Probabilities are represented by blue bars. MT gliding directions were aligned in the MT alignment area with significant decreases in the SDs of the orientation angles. Bin width = π/19 rad. (I) MT-2 (purple dashed lines) and MT-5 (red solid lines) were sorted with 57.7% efficiency (n = 129). (J) MT-2 (purple dashed lines) and MT-5′ (orange solid lines) were sorted with 80.4% efficiency (n = 159). Blue triangles represent the PDMS separation wall. An electric field of 3 kV m−1 was applied in the negative x direction. The upper right corners of the MT alignment area are set to origin. Naoto Isozaki et al. Sci. Robotics 2017;2:eaan4882 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works