Oil Navigates a Maze!!!

Can you beat this maze without messing up... In the past rats have completed mazes. now a new contender takes a spot in the winners circle OIL! Making oil move by itself usually only true in science fiction movies. However scientists who work in the Northwestern University in Evanston, Illinois fill a maze with an alkaline* solution. And at the end square** they placed a drop of acid to create a pH gradient^ of oil to pull the droplet through the maze. They also created a situation where the droplet would purposely go and take a few wrong turns. The reason for making this oil droplet travel through this maze was so that they could test a new way for drug delivery and for medicines to find specific areas of the body and not release the medicine in the wrong spot or to give a higher dosage to a concentrated area. It could solve NP–complete^^ math problems or to remove oil from the byproducts and to remove oil from the water's surface in the case of a spill. They also can use this new technology to create better circuits.
To me this achievement can help the world to become better. This can be used to extract oil from the deep sea wells. Also this will help the world for it will open new science fields. Lastly, this achievement will help improve our world because this will help solve more scientific problems that can't be solved yet because it will open a new way to do experiments.

*Alkali's are best known for being bases (compounds with pH greater than 7) that dissolve in water. Alkaline is commonly used as a synonym for base, especially for soluble bases.
**Dotted square at the maze where there is a red dot
^ A pH gradient is established by the use of ampholytes^^^, when present as a mixture, migrate in an electric current to their pI, thereby producing a pH gradient
^^A decision problem C is NP-complete if: C is in NP, and Every problem in NP is reducible to C in polynomial time.
^^^having characteristics of both an acid and a base and capable of reacting as either

http://www.cfdrc.com/index.php?option=com_content&view=article&id=154&Itemid=190
Google definitions
http://www.popsci.com/science/article/2010-01/droplet-oil-navigates-maze-well-lab-rat
http://en.wikipedia.org/wiki/NP-complete

PS: see this article about the crime in the space shuttle hanger