Local magnetization and sensing of flexible magnetic tag for long-term monitoring under wet environment

We have successfully fabricated and installed flexible magnetic tag which has about 9 bits information to biological material in limited space under wet environment. The magnetizing of tag use focusing of magnetic field based on the magnetic circuit using high magnetic permeability material. Fundamental test for the magnetic tag show the magnetic signal can be discriminated even 30 days after injection of magnetic tag. This study can contribute to identify the various gene transferred biomaterials and contribute to the gene technology and long-term monitoring of environment.