Selective deposition of materials on countoured surfaces
View Patent ↗A method of patterning materials, such as proteins, on a contoured surface by depositing them onto protrusions on a surface, and a cell containment device that may be constructed by this method, are provided. The method may involve selectively depositing a material on a substrate including a contoured surface including protrusions and recesses. By applying a first fluid to the contoured surface and allowing the first fluid to distribute across only a portion of the contoured surface, a material may be deposited on the protrusions and not the recesses, or on the recesses and not the protrusions. Such a method may be used to selectively pattern cells or other materials on substrates.
1. A method of selectively depositing a material on a substrate including a contoured surface including a protrusion and a recess, the method comprising:
applying a first fluid to the contoured surface of the substrate;
allowing the first fluid to distribute across a portion of the contoured surface such that the first fluid contacts the protrusion and not the recess; and
allowing a first material to deposit from the first fluid on the protrusion of the substrate.
2. The method of claim 1 , further comprising:
applying a second fluid to the contoured surface of the substrate;
allowing the second fluid to distribute across a portion of the contoured surface such that the second fluid contacts the recess; and
allowing a second material to deposit from the second fluid on the recess of the substrate.
3. The method of claim 2 , further comprising:
applying a third fluid to the contoured surface of the substrate;
allowing the third fluid to distribute across a portion of the contoured surface; and
allowing a third material with an affinity for one of the first material and the second material to deposit from the third fluid on the substrate only where the one of the first material and the second material is deposited.
4. The method of claim 3 , wherein the first material is a protein.
5. The method of claim 4 , wherein the second material is a protein.
6. The method of claim 5 , wherein the first material is cytophobic.
7. The method of claim 6 , wherein the second material is cytophilic.
8. The method of claim 7 , wherein the third material is a cell.
9. The method of claim 1 , wherein the recess comprises a microwell.
10. The method of claim 9 , wherein the microwell is less than 1 millimeter in width and depth.
11. The method of claim 10 , wherein the microwell is less than 100 micrometers in width and depth.
12. The method of claim 11 , wherein the microwell is less than 50 micrometers in width and depth.
13. The method of claim 1 , wherein the protrusion comprises a microprotrusion.
14. The method of claim 13 , wherein the microprotrusion is less than 1 millimeter in width and height.
15. The method of claim 14 , wherein the microprotrusion is less than 100 micrometers in width and height.
16. The method of claim 15 , wherein the microprotrusion is less than 50 micrometers in width and height.
17. The method of claim 1 , wherein the substrate comprises a flexible material.
18. The method of claim 1 , wherein the substrate comprises a polymer.
19. The method of claim 18 , wherein the substrate comprises polydimethylsiloxane.
20. The method of claim 1 , wherein the substrate comprises a plurality of recesses.
21. The method of claim 20 , wherein the recess comprises a portion of the substrate between the protrusions.
22. The method of claim 1 , wherein the substrate comprises a plurality of protrusions.
23. The method of claim 22 , wherein the protrusion comprises a portion of the substrate between the recesses.
24. The method of claim 1 , wherein the first fluid has an advancing angle of greater than about 90°.
25. The method of claim 3 , wherein at least one of the second fluid and the third fluid has an advancing angle of less than about 90°.
26. A method, comprising:
selectively depositing a protein on an outward-facing portion of a protrusion of a contoured surface including a protrusion and a recess, at least one of the protrusion and recess having a maximum lateral dimension of no more than about 1 mm, while leaving the recess free of the protein.
27. A method of selectively depositing a material on a substrate having a contoured surface including a protrusion and a recess, the method comprising:
applying a fluid to the contoured surface without urging the fluid against the surface mechanically, and allowing the fluid to contact the protrusion and not the recess; and
allowing a first material to be deposited from the fluid onto the protrusion but not the recess.