Text this: USE OF LANTHANIDE DOPED NANOPARTICLES FOR SINGLE PARTICLE IMAGING AND TRACKING

 __   _      ___      _____    __   __    _____   
| || | ||   / _ \\   / ____||  \ \\/ //  /  ___|| 
| '--' ||  | / \ || / //---`'   \ ` //  | // __   
| .--. ||  | \_/ || \ \\___      | ||   | \\_\ || 
|_|| |_||   \___//   \_____||    |_||    \____//  
`-`  `-`    `---`     `----`     `-`'     `---`