Nanotechnology is a growing industry with a global research and development spend of approximately 9 billion US dollars in 2005 – the overall global market is expected to reach 2 trillion US dollars by 2015. Nanoparticles have novel properties with many different chemistries and sizes and are mostly defined as being between 1 – 100 nanometres in size – about 10,000 times smaller than a typical human cell and about 100,000 times smaller than the width of a single human hair. They are already being used by manufacturers in many different products and processes, for example, suntan lotions, cosmetics, toothpastes, antibiotics and fabrics.