Reduced graphene oxide film

• US 8,182,917 B2
• Filed: 02/06/2009
• Issued: 05/22/2012
• Est. Priority Date: 03/20/2008
• Status: Active Grant

• Current Assignee: The Government Of The United States As Represented By The Secretary Of The Navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Robinson, Jeremy T., Snow, Eric S
• Primary Examiner(s): ROGERS, DAVID A
• Application Number:
  US12/366,833
• Publication Number:
  US 20090235721A1
• Time in Patent Office: 1,201 Days
• Field of Search: 428/408, 252/378.R
• US Class Current: 428/408
• CPC Class Codes: B05D 1/005 Spin coating
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2309/105 Thickness
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G01G 3/16 measuring variations of frequency of oscillations of the body
• CPC Class Codes: G01N 5/00 Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid G01N9/00 takes precedence ; weighing per se G01G
• CPC Class Codes: H01H 1/0036 Switches making use of microelectromechanical systems [MEMS] for electromagnetic relays H01H50/005; for electrostatic relays H01H59/0009
• CPC Class Codes: H01H 2203/012 Microprotrusions
• CPC Class Codes: H01H 59/0009 making use of micromechanics
• CPC Class Codes: Y10T 428/24562 Interlaminar spaces
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

Spin coating a mixture of graphene oxide platelets, water, and an organic solvent by placing a drop of the mixture on a spinning substrate while blowing a drying gas onto the substrate and allowing the water and the organic solvent on the substrate to evaporate; and repeating the spin coating one or more times to form a graphene oxide film in contact with the substrate. An about 1-100 nm thick film of overlapping platelets of reduced graphene oxide.

Claims

1. A film comprising overlapping platelets of reduced graphene oxide;

wherein the film is from about 1 nm to about 100 nm thick; and

wherein the film is in contact with a contoured substrate such that portions of the film are suspended above the substrate.

2. The film of claim 1, wherein the film is in electrical contact with two electrodes.

3. A sensor comprising:

the film and the electrodes of claim 2;

an intake that contacts a fluid sample to the film; and

an electrical meter in contact with the electrodes.

4. A mass sensor comprising:

the film and contoured substrate of claim 1; and

a device that measures vibrations of the suspended film.

5. The mass sensor of claim 4, wherein the device is a laser interferometer or a capacitance meter.

6. A device comprising:

the film and contoured substrate of claim 1;

wherein the space between the suspended film and the contoured substrate is a microfluidic channel.

7. An optical modulator comprising:

the film and contoured substrate of claim 1;

two electrodes in electrical contact with the film;

a voltage source attached to the electrodes that applies a voltage that causes a portion of the suspended film to contact the substrate.

8. A switch comprising:

the film and contoured substrate of claim 1;

two electrodes in electrical contact with the film;

a third electrode on the substrate below the suspended portion of the film,

a voltage source attached to the electrodes in electrical contact with the film that applies a voltage that causes a portion of the suspended film to contact the third electrode.

9. The film of claim 1, wherein the film has a Young'"'"'s modulus of at least about 100 GPa.