This document discusses the properties and medical applications of nanoparticles. It begins by defining nanoparticles and nanotechnology. It then discusses various methods for synthesizing nanoparticles and their unique properties at the nanoscale. The document outlines several medical applications of nanoparticles, including drug delivery, cancer treatment, surgery, and antibiotic resistance. It provides examples of how nanoparticles can be used for targeted drug delivery, photodynamic therapy, MRI contrast agents, and more. The conclusion reiterates that nanoparticles have increased surface area and novel properties that can benefit medical applications.