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Nanomaterials cannot be considered a homogeneous group, given that physically and structurally they are very different from each other and also from their "normal" sized counterparts. Although they derive from known chemical substances, nanomaterials are in a way new chemical substances, with particular properties, often different from those of the "normal" sized materials from which they come. "Nano" therefore refers to the size, rather than the object itself. The definitions of these vary, as much as the terms used to name them (nanoparticles, nanomaterials, nanotechnologies, etc.), and no consensus has yet been found among experts to define them in a uniform manner. It is generally accepted that nanotechnology involves the manipulation of matter on a scale of 1 to 100 nanometers. The nanometer is equivalent to one billionth of a meter. A nanomaterial is composed or constitutes of nano-objects (whose size is between 1 and 100 nm) which presents specific properties at the nanometric scale.
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Abdoul Hamid Derra - Information systems engineer, entrepreneur, researcher, developer of strategic studies, educational advisor, mother-child health, nutritionist.
