Method and system for langmuir-blodgett assembly

Patent metadata

Field	Value
Publication number	US-2017028433-A1
Application number	US-201615223617-A
Country	US
Kind code	A1
Filing date	Jul 29, 2016
Priority date	Jul 31, 2015
Publication date	Feb 2, 2017
Grant date	—

Abstract

This invention relates to method and system for forming a film. The method including providing a trough containing water defining an air-water interface between air and the water; providing a solution containing a material of interest; and electrospraying the solution onto the air-water interface of water to form a film of the material of interest at the air-water interface. The system includes a trough containing water defining an air-water interface between air and the water; and means for spreading a solution containing a material of interest onto the air-water interface of water by electrospray, to form a film of the material of interest at the air-water interface. The spreading means comprises an electrospraying device.

First claim

What is claimed is:

1 . A method for forming a film, comprising:
providing a trough containing water defining an air-water interface between air and the water; providing a solution containing a material of interest; and electrospraying the solution onto the air-water interface of water to form a film of the material of interest at the air-water interface.

2 . The method of claim 1 , wherein the solution contains a dispersion of the material of interest in water, a water-miscible solvent, or a mixture of them.

3 . The method of claim 1 , wherein the solution contains a stock solution of the material of interest.

4 . The method of claim 3 , wherein the stock solution contains a water-miscible solvent.

5 . The method of claim 4 , wherein the stock solution of the material of interest is devoid of a surface medication or a solvent exchange.

6 . The method of claim 3 , wherein the solution further contains a water-miscible solvent added into the stock solution of the material of interest in water.

7 . The method of claim 1 , wherein the solution contains an aqueous colloidal dispersion.

8 . The method of claim 1 , wherein the material of interest comprises Au/polyvinylpyrrolidone (PVP) particles, polystyrene (PS) beads, polyaniline (PANI) nanofibers, graphene oxide (GO) sheets, nanoparticles of other materials, or biological colloids.

9 . The method of claim 1 , wherein the film is of a monolayer.

10 . The method of claim 1 , further comprising transferring the film to a solid substrate.

11 . An article comprising the film formed according to the method of claim 1 .

12 . A method for forming a film, comprising:
providing a solution containing a material of interest; and spreading the solution onto an air-water interface of water, without producing air flow to disturb the air-water interface, to form a film of the material of interest at the air-water interface.

13 . The method of claim 12 , wherein the spreading step comprises nebulizing the solution.

14 . The method of claim 12 , wherein the spreading step is performed with electrospraying.

15 . The method of claim 12 , wherein the solution contains a dispersion of the material of interest in water, a water-miscible solvent, or a mixture of them.

16 . The method of claim 12 , wherein the solution contains a stock solution of the material of interest.

17 . The method of claim 16 , wherein the stock solution contains a water-miscible solvent.

18 . The method of claim 17 , wherein the stock solution of the material of interest is devoid of a surface medication or a solvent exchange.

19 . The method of claim 16 , wherein the solution further contains a water-miscible solvent added into the stock solution of the material of interest in water.

20 . The method of claim 12 , wherein the solution contains an aqueous colloidal dispersion.

21 . The method of claim 12 , wherein the material of interest comprises Au/polyvinylpyrrolidone (PVP) particles, polystyrene (PS) beads, polyaniline (PANI) nanofibers, graphene oxide (GO) sheets, nanoparticles of other materials, or biological colloids.

22 . The method of claim 12 , wherein the film is of a monolayer.

23 . The method of claim 12 , further comprising transferring the film to a solid substrate.

24 . An article comprising the film formed according to the method of claim 12 .

25 . A system for forming a film, comprising:
a trough containing water defining an air-water interface between air and the water; and means for spreading a solution containing a material of interest onto the air-water interface of water, without producing air flow to disturb the air-water interface, to form a film of the material of interest at the air-water interface.

26 . The system of claim 25 , wherein the spreading means comprises an electrospraying device.

27 . The system of claim 26 , wherein an electrospraying device comprises a syringe, connected to a syringe pump to control a flow rate of the solution, having a needle connected to a power supply, and operably positioned above the air-water interface.

28 . The system of claim 27 , further comprising a grounding wire submerged in a water subphase.

29 . The system of claim 25 , wherein the solution contains a dispersion of the material of interest in water, a water-miscible solvent, or a mixture of them.

30 . The system of claim 25 , wherein the solution contains a stock solution of the material of interest.

31 . The system of claim 30 , wherein the stock solution contains a water-miscible solvent.

32 . The system of claim 31 , wherein the stock solution of the material of interest is devoid of a surface medication or a solvent exchange.

33 . The system of claim 30 , wherein the solution further contains a water-miscible solvent added into the stock solution of the material of interest in water.

34 . The system of claim 25 , wherein the solution contains aqueous colloidal dispersions.

35 . The system of claim 25 , wherein the material of interest comprises Au/polyvinylpyrrolidone (PVP) particles, polystyrene (PS) beads, polyaniline (PANI) nanofibers, graphene oxide (GO) sheets, nanoparticles of other materials, or biological colloids.

36 . The system of claim 25 , wherein the film is of a monolayer.

Assignees

• Univ Northwestern

Inventors

• Huang Jiaxing
• Nie Huali

Classifications

• B05D1/204 Primary

  LB techniques · CPC title

• C08K3/08

  Metals · CPC title

• C09D7/1216

  Chemistry & Metallurgy · mapped topic

• B05D1/04

  involving the use of an electrostatic field {(B05D1/025 and B05D1/14 take precedence)} · CPC title

• B05D1/283 Primary

  Transferring monomolecular layers or solutions of molecules adapted for forming monomolecular layers from carrying elements · CPC title