Methods of nanoscale directional wetting and uses thereof
This invention discloses a method for controlling nanoscopic wetting near or at a molecular scale for synthetic material applications. In particular this invention relates to a method for preparing a monolayer or thin film with a patterned nanoscopic wetting surface using a ‘sitting’ phase of polymerizable amphiphile, wherein hydrophobic alkyl chains of the amphiphile extend along the supporting surface and the amphiphile molecules align side-to-side, effectively forming a repeating cross-section of bilayer with alternating hydrophilic and hydrophobic stripes of a ˜6 nm pitch tunable based on the chain length of the amphiphile. Products prepared according to the methods disclosed herein are within the scope of this invention. In some embodiments, monolayers or thin films so prepared are transferable.
1. A method for preparing a monolayer or a thin film with a patterned nanoscopic wetting surface at a scale of 10 nm or less comprising the steps of:
a) preparing a polymerizable amphiphile with at least one hydrophobic constituent and one hydrophilic constituent;
b) preparing a supporting surface;
c) assembling the polymerizable amphiphile on said supporting surface, wherein said amphiphile adopts a horizontal orientation exposing both hydrophobic and hydrophilic constituents; and
d) polymerizing the assembled amphiphile to afford a monolayer or thin film with a patterned nanoscopic wetting surface at a scale of 10 nm or less.
2. The method of claim 1 , wherein polymerization of said monolayer or thin film of the polymerizable amphiphile is performed by irradiating the assembled polymerizable amphiphile with an UV light.
3. The method of claim 1 , wherein said supporting surface comprises graphene, highly oriented pyrolytic graphite (HOPG), MoS 2 or WS 2 .
4. The method of claim 1 , wherein said polymerizable amphiphile is a phospholipid.
5. The method of claim 4 , wherein said phospholipid is 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (diyne PC), 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphoethanolamine (diyne PE), or an analog thereof.
6. A method for controlling patterned nanoscopic wetting at a scale of 10 nm or less comprising the steps of
a) preparing a polymerizable amphiphile with at least one hydrophobic constituent and one hydrophilic constituent;
b) preparing a supporting surface;
c) assembling the polymerizable amphiphile on said supporting surface, wherein said amphiphile adopts a horizontal orientation exposing both hydrophobic and hydrophilic constituents;
d) polymerizing the assembled polymerizable amphiphile to afford a monolayer or thin film with a patterned nanoscopic wetting surface; and
e) depositing a liquid or other material, wherein a controlled patterned nanoscopic wetting at a scale of 10 nm or less is achieved through accessing both hydrophobic and hydrophilic constituents of said monolayer or thin film with a patterned nanoscopic wetting surface.
7. The method of claim 6 , wherein polymerization of said amphiphile monolayer or thin film is performed by irradiating the monolayer or thin film with an UV light.
8. The method of claim 6 , wherein said liquid or other material comprises an organic or inorganic material.
9. The method of claim 6 , wherein said liquid or other material interacts with said amphiphile through covalent or ionic bonding, or through other chemical interactions, creating defined regions of a new surface chemistry.
10. The method of claim 6 wherein said depositing a liquid or other material comprises electrospray, spin-coating, drop-casting, or the like, wherein wetting properties of said liquid or other material on said supporting surface are controlled by head groups, tail groups, or both, of said amphiphile.
11. The method of claim 6 , wherein one or more types of amphiphile are used to prepare said monolayer or thin film together with one or more nonpolymerizable amphiphile.
12. The method of claim 6 , wherein one or more types of amphiphile are used to prepare said monolayer or thin film together with one or more non-amphiphiles.
13. The method of claim 6 , wherein a horizontally-oriented amphiphile is used in combination with an amphiphile oriented non-horizontally.
14. The method of claim 6 , wherein said supporting surface is graphene, highly oriented pyrolytic graphite, MoS 2 or WS 2 .
15. The method of claim 6 , wherein said amphiphile is a polymerizable phospholipid.
16. The method of claim 15 , wherein said polymerizable phospholipid is 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (diyne PC), 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphoethanolamine (diyne PE), or an analog thereof.