# US 8,540,889 B1 · Methods of generating liquidphobic surfaces

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,540,889 B1
- Document ID: US8540889B1
- Status: Granted
- Kind: B1
- Application number: 12/620,244
- Filed: 2009-11-17
- Granted: 2013-09-24
- Earliest claimed: 2008-11-19
- Assignees: Nanosys, Inc.
- Applicants: Jason Hartlove; Ronald Barr; Robert S. Dubrow
- Inventors: Jason Hartlove; Ronald Barr; Robert S. Dubrow
- Web page: https://patentgrep.com/patent/US8540889B1

## CPC

- B05D 5/083: {involving the use of fluoropolymers}
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)

## Abstract

The present invention relates to methods of generating liquidphobic surfaces, and surfaces prepared by these methods. The methods include generating sub-micron-structured surfaces and coating these surfaces with a liquidphobic coating, such as a hydrophobic coating.

## Claims

### Claim 1

A method of generating a liquidphobic surface, comprising:
(a) providing a first substrate;
(b) providing a sub-micron-structured surface on the first substrate by growing upstanding sub-micron nanowires on the substrate which extend perpendicular to the substrate, the nanowires having an aspect ratio (length:width) of 2 or greater;
(c) transferring a sub-micron-structure complementary to the sub-micron-structured surface to a surface of a second substrate; and
(d) disposing a liquidphobic coating on the surface of the second substrate;
wherein the transferring in (c) comprises evaporating and/or plating metal onto the sub-micron-structured surface of the first substrate, resulting in a complementary sub-micron-structure in the metal.

### Claim 2 (depends on 1)

The method of claim 1, wherein the providing comprises providing a first substrate comprising a metal.

### Claim 3 (depends on 2)

The method of claim 2, wherein the providing comprises providing a nickel substrate.

### Claim 4 (depends on 1)

The method of claim 1, wherein the disposing comprises disposing a perfluorinated organic coating.

### Claim 5

A method of generating a liquidphobic surface, comprising:
(a) generating a sub-micron-structured surface on a first substrate by growing sub-micron upstanding nanowires on the substrate which extend perpendicular to the substrate, the nanowires having an aspect ratio (length:width) of 2 or greater;
(b) transferring a sub-micron-structure complementary to the sub-micron-structured surface to a surface of a second substrate; and
(c) disposing a liquidphobic coating on the surface of the second substrate;
wherein the transferring in (b) comprises evaporating and/or plating metal onto the sub-micron-structured surface of the first substrate, resulting in a complementary sub-micron-structure in the metal.

### Claim 6 (depends on 5)

The method of claim 5, wherein the generating in (a) comprises:
i. providing a substrate;
ii. generating a sub-micron-structured surface on the surface of the substrate to generate a transfer substrate; and
iii. transferring a sub-micron-structure complementary to the sub-micron-structured surface of the transfer substrate to a surface of the first substrate.

### Claim 7 (depends on 6)

The method of claim 6, wherein the providing comprises providing a silicon substrate.

### Claim 8 (depends on 5)

The method of claim 5, wherein nickel is evaporated and then plated onto the sub-micron-structured surface of the first substrate.