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Programmable wettability on photocontrolled graphene film

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Presentation on theme: "Programmable wettability on photocontrolled graphene film"— Presentation transcript:

1 Programmable wettability on photocontrolled graphene film
by Jie Wang, Wei Gao, Han Zhang, Minhan Zou, Yongping Chen, and Yuanjin Zhao Science Volume 4(9):eaat7392 September 14, 2018 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

2 Fig. 1 Schematic diagram of the PIPGF with programmable wettability.
Schematic diagram of the PIPGF with programmable wettability. (A) Tunable wettability of the PIPGF controlled remotely using NIR light. (B) Programmable wettability pathways on the surface of the PIPGF were formed with the integration of NIR masks for controllable droplet manipulation. Jie Wang et al. Sci Adv 2018;4:eaat7392 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

3 Fig. 2 Microstructures and wettability of the graphene sponge film and the PIPGF.
Microstructures and wettability of the graphene sponge film and the PIPGF. (A to D) SEM images of (A and B) the graphene sponge film and (C and D) the PIPGF. (A) and (C) are the surfaces, and (B) and (D) are the cross sections of the corresponding film. (E) Measured water contact angles of the porous graphene sponge film, the PIPGF with laser switched on, and the PIPGF with laser switched off, respectively. (F) Progress of the water droplet sliding down the surface of the PIPGF with laser switched on; the sliding angle of which is 5°. (G) Progress of the water droplet sliding down the surface of the PIPGF with laser switched off; the sliding angle of which is 87°. (H) Water sliding angle variation of the PIPGF as a function of laser cycle numbers. Scale bars, 10 μm. Jie Wang et al. Sci Adv 2018;4:eaat7392 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

4 Fig. 3 Dynamic control of droplet mobility on a tilted PIPGF surface of 20°.
Dynamic control of droplet mobility on a tilted PIPGF surface of 20°. (A) Progress of a water droplet pinned on the PIPGF at room temperature. (B) Progress of the water droplet sliding down the surface of the PIPGF with NIR switched on. (C) Progress of the droplet pinned on the PIPGF after NIR switched off. Jie Wang et al. Sci Adv 2018;4:eaat7392 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

5 Fig. 4 Dynamic control of the droplet mobility on the PIPGF surface guided by designed pathways.
Dynamic control of the droplet mobility on the PIPGF surface guided by designed pathways. (A) Oblique pathway, (B) arc pathway, and (C) S-shape pathway, respectively. Jie Wang et al. Sci Adv 2018;4:eaat7392 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

6 Fig. 5 Progress of applying the PIPGF for pipetting droplets.
Progress of applying the PIPGF for pipetting droplets. (A and B) Pipetting droplets into microplates. The same samples were pipetted into different wells in (A), and the different samples were pipetted into different wells in (B). (C) Pipetting droplets to form microarrays on the surfaces of the PIPGF. Jie Wang et al. Sci Adv 2018;4:eaat7392 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

7 Fig. 6 PIPGF with programmed wettability pathways as microfluidics.
PIPGF with programmed wettability pathways as microfluidics. (A and B) Dynamic control of the droplet mobility on the PIPGF surface guided by complicated droplet-guiding pathways with (A) Y-patterned and (B) Y-Y–composite channels. (C and D) Schematic diagram (C) and progress (D) of using the PIPGF microreactor for grouping the blood sample (A+) by simply monitoring whether the composite blood droplets slid down or not. The antibodies are anti-D, anti-A, and anti-B from left to right in (C) and (D). Jie Wang et al. Sci Adv 2018;4:eaat7392 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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