Little things, BIG POTENCIAL

I didn´t know much about the little world of atoms and molecules. I  used to watch the cartoon´s characters exploring the body with little navies or use nanorobots for to be stronger or cure of illness in television ,and I also listened about nanorobots or little particles and the human health but not more about this topic. 

The nanotechnology is the study and control of matter at the nanoscale (one nanometers is 10^-9 meters and this scale is between 1 and 100 nanometers really small things like molecules and nanomaterials we found here), and take advantage of the matter´s properties (physical, chemical, and biological) at nanoscale (because their properties change when use only a couple of molecules or atoms).

They are used in medicine, construction, to improve the alternative energies; also they are use in cosmetic, food, chemical, sporting goods and automovilistic industries. One reason for I choose this science is the potential for the career and the possible impact of human welfare. 

This (little) matters can modify the behavior of cell, how motivate the growth of nerve cells in neuronal degenerative diseases , or for facilitate treatments, like helping find and eliminate cancer cell with nanoparticles thereby avoiding the secondary effects of chemotherapies, or identified diseases, or monitored the cell in their environment expanding knowledge about the micro and macro worlds. 

 But despite this science can help us it´s also very dangerous. Many molecules and atoms can injure the people when they are worked a nanoscale. One example is the silver nanoparticles in big scale are toxically for the cells and can do put the skin blue.