Physicochemical Principles of Nanosized Drug Delivery Systems
Introduction to Nanoscience and Nanotechnology
Today, nanotechnology is a commonly used buzzword in numerous fields of science and everyday life, and fairly recently in drug delivery (Dosch, 2001; Navrotsky, 2007). Numerous definitions have been coined to describe nanotechnology and nanoscience and these are often used interchangeably. Nanoscience could be defined as the activity aimed at the understanding of natural laws at a nanoscale level and nanotechnology as the novel and practical applications of this scientific knowledge to change the world we live in (Balzani, 2005).
Several restrictions have been placed on what exactly nanotechnology is. It has been described as the exploitation of materials with structural features at the intermediate range between atoms and the molecular scale with the important prerequisite that at least one dimension is in the nanometer length scale (Rao & Cheetham, 2001; Rao, Kulkarni, Thomas & Edwards, 2002; Jortner & Rao, 2002). The most common...
KeywordsGlass Transition Temperature Cohesive Energy Critical Radius Specific Free Energy Critical Nucleus Size
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