ANALYZING THE TRANSPORT OF PLASMONIC PARTICLES THROUGH MINERAL FORMATIONS

• US 20130168543A1
• Filed: 06/02/2011
• Published: 07/04/2013
• Est. Priority Date: 06/02/2010
• Status: Active Grant

• Current Assignee: Rice University
• Original Assignee: Rice University
• Inventors: Barron, Andrew R., Maguire-Boyle, Samuel J., Orbaek, Alvin W.
• Granted Patent: US 8,575,548 B2
• Time in Patent Office: Days
• US Class Current: 250/259
• CPC Class Codes: G01N 15/075 by optical means
• CPC Class Codes: G01N 2021/258 Surface plasmon spectroscopy, e.g. micro- or nanoparticles in suspension
• CPC Class Codes: G01N 30/74 Optical detectors measurement of intensity, velocity, spectral content, polarisation, or phase of infrared, visible or ultraviolet light G01J
• CPC Class Codes: G01N 33/24 Earth materials G01N33/42 takes precedence
• CPC Class Codes: G01V 8/02 Prospecting
• CPC Class Codes: Y10T 436/171538 Urea or blood urea nitrogen

Abstract

A transport of plasmonic particles through a mineral formation is analyzed by flowing a plasmonic particles solution through an immobile phase (e.g., a mineral formation), determining an absorbance of the plasmonic particles solution subsequent to flowing the plasmonic particles solution through the immobile phase, comparing the determined absorbance of the plasmonic particles solution with an absorbance of the plasmonic particles solution determined previous to flowing the plasmonic particles solution through the immobile phase, and determining an absorbance of the plasmonic particles to the immobile phase as a function of the comparison. The plasmonic particles solution may be produced by dissolving or suspending plasmonic particles in a mobile phase. Flowing the plasmonic particles solution through the immobile phase may include injecting the plasmonic particles solution into the immobile phase, and then flushing the plasmonic particles solution through the immobile phase.

Claims

1. A method for analyzing a transport of plasmonic particles through a mineral formation comprising an immobile phase, wherein the method comprises:

(a) dissolving or suspending plasmonic particles in a mobile phase to form a plasmonic particles solution;

(b) flowing the plasmonic particles solution through the immobile phase;

(c) determining an absorbance of the plasmonic particles solution, wherein the determining occurs subsequent to flowing the plasmonic particles solution through the immobile phase;

(d) comparing the determined absorbance of the plasmonic particles solution with an absorbance of the plasmonic particles solution determined previous to flowing the plasmonic particles solution through the immobile phase; and

(e) determining an absorbance of the plasmonic particles to the immobile phase as a function of the comparison of the determined absorbance of the plasmonic particles solution with the absorbance of the plasmonic particles solution determined previous to flowing the plasmonic particles solution through the immobile phase.

2. The method of claim 1, wherein flowing the plasmonic particles solution through the immobile phase further comprises:

(a) injecting the plasmonic particles solution into the immobile phase; and

(b) flushing the plasmonic particles solution through the immobile phase.

3. The method of claim 1, wherein the plasmonic particle is selected from the group consisting of silver particles, gold particles, copper particles, and combinations thereof.

4. The method of claim 1, wherein the plasmonic particle is a nanoshell material comprising a dielectric core surrounded by a shell, wherein the shell comprises at least one of gold, silver, or copper.

5. The method of claim 1, wherein the plasmonic particle comprises a functionalized surface.

6. The method of claim 5, wherein the functionalized surface comprises functional groups selected from the group consisting of carboxylic acids, esters, amines, alcohols, alkanes, aryl groups, and combinations thereof.

7. The method of claim 1, wherein the plasmonic particles have sizes in a range of 0.5 nm to 200 nm.

8. The method of claim 1, wherein the mobile phase comprises hydrocarbons.

9. The method of claim 1, wherein the mobile phase comprises surfactants.

10. The method of claim 1, wherein the immobile phase is a subterranean formation.

11. The method of claim 1, wherein the immobile phase is selected from the group consisting of sands, sandstones, carbonate rocks, shales, micas, aluminates, silicates, clays, and combinations thereof.

12. The method of claim 1, wherein the immobile phase comprises a core extracted from the mineral formation, wherein the core has a particle size range of between approximately 1 micrometer in diameter to approximately 100 micrometers in diameter.

13. The method of claim 1, wherein the immobile phase is packed in a column.

14. The method of claim 1, wherein the mobile phase has a flow rate in a range of between approximately 5 mL/min to approximately 50 mL/min.

15. The method of claim 1, wherein the determining of the absorbance of the plasmonic particles solution is performed using a UV-visible spectrophotometer.

16. The method of claim 1, wherein the determining of the absorbance of the plasmonic particles solution is performed as a function of time.

17. The method of claim 1, wherein determining the absorbance of the plasmonic particle to the immobile phase comprises determining a sticking coefficient of the plasmonic particle to the immobile phase.

18. The method of claim 1, wherein the mineral formation is a subterranean formation.