Amazing World Of NanoTechnology
January 7, 2007 4:36am CST
Everyone know a 'nano' is tiny but it is the enhanced properties achieved through molecular manipulation that hold the promise of dramatically different materials,process and products. The body of information surrounding NanoTechnology is incredible. But just what is nanotechnology? Nanotechnology is not new. A peice of art in the British Museum called the Lycurgus Cup, a roman glass cage,dates to the fourth century. The cup changes color as it reflects light because it contains nano-particles of gold and silver.(each crystal is about 70 nm). Did the Romans knew that they were using nanotechnology? Probably not, but tye fact remains that nano-materials have benn impacting the world for centuries. What do you have to say on this..Reply me
18 Jan 07
Nanotechnology research has focusly primarily on molecular manufacturing -- the creation of tools, materials, and machines that will eventually enable us "to snap together the fundamental building blocks of nature easily, inexpensively and in most of the ways permitted by the laws of physics." A leading nanotech scientist describes past efforts at molecular level manufacturing as attempts to assemble LEGO pieces while wearing boxing gloves. Nanotechnology, he believes, will enable us to take off the gloves and build extraordinary things. two links about it: http://ask.yahoo.com/ask/20020806.html http://en.wikipedia.org/wiki/Nanotechnology
8 Jan 07
Nanotechnology (sometimes referred to as nanofabrication)is a field of applied science and technology covering a broad range of topics. The main unifying theme is the control of matter on a scale smaller than one micron, as well as the fabrication of devices on this same length scale. It is a highly multidisciplinary field, drawing from fields such as colloidal science, device physics, and supramolecular chemistry. Much speculation exists as to what new science and technology might result from these lines of research. Some view nanotechnology as a marketing term that describes pre-existing lines of research. Despite the apparent simplicity of this definition, nanotechnology actually encompasses diverse lines of inquiry. Nanotechnology cuts across many disciplines, including colloidal science, chemistry, applied physics, biology. It could variously be seen as an extension of existing sciences into the nanoscale, or as a recasting of existing sciences using a newer, more modern term. Two main approaches are used in nanotechnology: one is a "bottom-up" approach where materials and devices are built from molecular components which assemble themselves chemically using principles of molecular recognition; the other being a "top-down" approach where nano-objects are constructed from larger entities without atomic-level control. The impetus for nanotechnology has stemmed from a renewed interest in colloidal science, coupled with a new generation of analytical tools such as the atomic force microscope (AFM) and the scanning tunneling microscope (STM). Combined with refined processes such as electron beam lithography, these instruments allow the deliberate manipulation of nanostructures, and in turn led to the observation of novel phenomena. Nanotechnology is also an umbrella description of emerging technological developments associated with sub-microscopic dimensions. Despite the great promise of numerous nanotechnologies such as quantum dots and nanotubes, real applications that have moved out of the lab and into the marketplace have mainly utilized the advantages of colloidal nanoparticles in bulk form, such as suntan lotion, cosmetics, protective coatings, and stain resistant clothing.