Method for producing a three-dimensional macro-molecular structure

• US 6,881,950 B2
• Filed: 04/14/2003
• Issued: 04/19/2005
• Est. Priority Date: 04/12/2002
• Status: Active Grant

• Current Assignee: University of South Florida (State University System of Florida)
• Original Assignee: University of South Florida (State University System of Florida)
• Inventors: Kohlscheen, Joern, Braunagel, Chris, Schlaf, Rudiger
• Primary Examiner(s): Wells, Nikita
• Assistant Examiner(s): QUASH, ANTHONY G
• Application Number:
  US10/413,611
• Publication Number:
  US 20030218127A1
• Time in Patent Office: 736 Days
• Field of Search: 250/251, 250/307, 435/283.1, 435/6
• US Class Current: 250/251
• CPC Class Codes: B81C 1/0038 Processes for creating layers of materials not provided for in groups B81C1/00357 - B81C1/00373
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: Y10S 977/891 Vapor phase deposition

Abstract

A method produces a three-dimensional macro-molecular structure on a substrate in a vacuum. In this method, a solution of a solvent and a macro-molecular species is provided. The solution is ionized to provide ionized molecules of the solvent and molecules of the macro-molecular species. The ionized molecules of the solvent have a first electrical charge and the molecules of the macro-molecular species have a second electrical charge equivalent to the first electrical charge. As such, the ionized molecules of the solvent and the molecules of the macro-molecular species naturally repel each other. The molecules of the macro-molecular species are deposited on the substrate in the vacuum to produce the three-dimensional macro-molecular structure.

Claims

1. A method for producing a three-dimensional macro-molecular structure on a substrate in a vacuum defined within a vacuum chamber, said method comprising the steps of:

providing a solution of a solvent and a macro-molecular species;

ionizing the solution to provide ionized molecules of the solvent having a first electrical charge and molecules of the macro-molecular species having a second electrical charge equivalent to the first electrical charge such that the ionized molecules of the solvent and the molecules of the macro-molecular species naturally repel each other;

separating the ionized molecules of the solvent from the molecules of the macro-molecular species such that an ionized beam of the molecules of the macro-molecular species remains; and

deflecting the ionized beam to a specific location on the substrate to produce the three-dimensional macro-molecular structure on the substrate.

2. A method as set forth in claim 1 wherein the step of separating the ionized molecules of the solvent from the molecules of the macro-molecular species is further defined as pumping the ionized molecules of the solvent away from the molecules of the macro-molecular species.

3. A method as set forth in claim 1 further comprising the step of focusing the ionized beam prior to deflecting the ionized beam to the specific location on the substrate.

4. A method as set forth in claim 1 further comprising the step of injecting the solution into the vacuum.

5. A method as set forth in claim 1 further comprising the step of introducing the solution into a region adjacent the vacuum and drawing the solution into the vacuum.

6. A method as set forth in claim 5 wherein the step of drawing the solution into the vacuum is further defined as decreasing the pressure from the region adjacent the vacuum to the vacuum chamber such that the solution is drawn into the vacuum.

7. A method as set forth in claim 1 wherein the step of ionizing the solution is further defined as subjecting the solution to electron ionization.

8. A method as set forth in claim 1 wherein the step of ionizing the solution is further defined as subjecting the solution to electrospray ionization.

9. A method as set forth in claim 1 wherein the step of ionizing the solution is further defined as subjecting the solution to matrix-assisted laser desorption/ionization.

10. A method as set forth in claim 1 wherein the step of providing the solution of the solvent and the macro-molecular species is further defined as providing a solution of a solvent and a macro-molecular species selected from the group consisting of polymers, nanocrystals, carbon nanotubes, nanoclusters, organic molecules, biological molecules, and combinations thereof.

11. A method as set forth in claim 1 wherein the substrate is further defined as a silicon wafer and the step of deflecting the ionized beam to a specific location on the substrate is further defined as deflecting the ionized beam to a specific location on the silicon wafer to produce the three-dimensional macro-molecular structure on the silicon wafer.

12. A method as set forth in claim 1 wherein the step of providing the solution of the solvent and the macro-molecular species is further defined as simultaneously providing a plurality of solutions, with each solution including a different macro-molecular species.

13. A method as set forth in claim 12 wherein the macro-molecular species are selected from the group consisting of polymers, nanocrystals, carbon nanotubes, nanoclusters, organic molecules, biological molecules, and combinations thereof.

14. A method as set forth in claim 1 further comprising the step of depositing a metal on the substrate in combination with the molecules of the macro-molecular species.