Abstract:

Nanotechnology, as defined by the National Nanotechnology Initiative (NNI), is the study and use of structures roughly in the size range of 1 to 100 nm. Nanoparticles render a promising drug delivery system of controlled and targeted drug release. Nanoparticles are defined as particulate dispersions or solid particles with a size in the range of 10-1000nm. The drug is dissolved, entrapped, encapsulated or attached to a nanoparticle matrix. Depending upon the method of preparation, nanoparticles, nanospheres or nanocapsules can be obtained. Nanoparticles specially designed to release the drug in the vicinity of target sites. Nanomedicine and nano delivery systems are a relatively new but rapidly evolving science in which nanoscale materials are used as diagnostic tools or to deliver therapeutic agents to specific targeted sites in a controlled manner. In this article we have discussed about nanoparticles and its evaluation parameters.

Keywords: Nanoparticles, Nanotechnology, Polymers, Nanocapsules