Of Japan's Waseda University, Medical University of institutions such as the defense researchers used crab shells and kelp (a seaweed algae Division) in the composition, made from fresh-keeping film thickness only one-thousandth the thickness of the "nano-band-aid" . Experiments show that the very thin "band-aid" can be effective in promoting wound healing in dogs lungs.

study group contained crab shell chitosan and sodium alginate in kelp synthesis of transparent film, and made a wide range of thickness of the "nano-band-aid", the thickness of 30 nanometer to 1500 nanometer between. The researchers also found that if this film is less than the thickness of 200 nm, it is thinner stronger adhesive.

In the experiment, researchers used these two ingredients staggered thin-film stack, after stacking about 40 layers, forming a 75 nanometer thick "nano-band-aid." Film composition as a result of these two elements of the charge under the mutual attraction, so this kind of "band-aid" very strong.

researchers to have the above-mentioned thickness, 2 cm square of "band-aid" posted to the lungs dogs wounds 6 mm in diameter, the results of "band-aid" the strength sufficient to withstand the pressure of breathing air. 7 days later, the wounds the lungs of dogs started to generate blood vessels, wound healing after 30 days, without leaving any traces.

when soft organs such as lung wounds occur, the tendency of some doctors to stop bleeding, such as medical adhesives and tissues stick together, but the site was easy to adhesive bonding of complications, and sometimes the need for reoperation. Newly developed "nano-band-aid" to adapt to the convex surface of organs, living closely affixed to the wound, but not adhesion with other organizations. Wound healing, the "nano-band-aid" could be biodegradable in the body.

Japanese researchers think that this "nano-band-aid" can be used for stomach, liver and other soft and difficult to suture or easy bleeding of the organs of the organ, helps to shorten the operation time.