Nanotechnology Introduction

The term “nanotechnology” has evolved over the years via terminology drift to mean “anything smaller than microtechnology,” such as nano powders, and other things that are nanoscale in size, but not referring to mechanisms that have been purposefully built from nanoscale components
Source:
http://www.nanotech-now.com/introduction.htm

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Nanotechnology Basics
Coined as “nano-technology” in a 1974 paper by Norio Taniguchi at the University of Tokyo, and encompassing a multitude of rapidly emerging technologies, based upon the scaling down of existing technologies to the next level of precision and miniaturization. Taniguchi approached nanotechnology from the ‘top-down’ standpoint, from the viewpoint of a precision engineer.
Source:
http://www.nanotech-now.com/basics.htm
Types: Nanoparticles

Extensive libraries of nanoparticles, composed of an assortment of different sizes, shapes, and materials, and with various chemical and surface properties, have already been constructed. The field of nanotechnology is under constant and rapid growth and new additions continue to suppliment these libraries. The classes of nanoparticles listed below are a
Source:
http://biotech.about.com/od/nanotechnology/a/typesnanopart.htm