What is nano technology? How can this be programmed into a certain product like skin care cream?

Nanotechnology is a field of applied science focused on the design, synthesis, characterization and application of materials and devices on the nanoscale. Nanotechnology is a sub classification of technology in colloidal science, biology, physics, chemistry and other scientific fields and involves the study of phenomena and manipulation of material at the nanoscale, in essence an extension of existing sciences into the nanoscale. Two main approaches are used in nanotechnology: one is a "bottom-up" approach where materials and devices are built up atom by atom, the other a "top-down" approach where they are synthesized or constructed by removing existing material from larger entities. A unique aspect of nanotechnology is the vastly increased ratio of surface area to volume present in many nanoscale materials, which opens new possibilities in surface-based science, such as catalysis. This catalytic activity also opens potential risks in their interaction with biomaterials.





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. These new materials and structures have in turn led to the observation of novel phenomena such as the “quantum size effect” where the electronic properties of solids are altered with great reductions in particle size. This effect does not come into play by going from macro to micro dimensions. However, it becomes dominant when the nanometer size range is reached.





Materials reduced to the nanoscale can suddenly show very different properties compared to what they exhibit on a macroscale, enabling unique applications. For instance, opaque substances become transparent (copper); inert materials become catalysts (platinum); stable materials turn combustible (aluminum); solids turn into liquids at room temperature (gold); insulators become conductors (silicon). Much of the fascination with nanotechnology stems from these unique quantum and surface phenomena that matter exhibits at the nanoscale. Despite the great promise of numerous nanotechnologies such as quantum dots and nanotubes, real applications that that have moved out of the lab and into the marketplace have mainly utilized the advantages of colloidal nanoparticles, such as suntan lotion, cosmetics, protective coatings and stain resistant textiles.


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Skin Care Cream :There are four entry routes for nanoparticles into the body: they can be inhaled, swallowed, absorbed through skin or be deliberately injected during medical procedures (or released from implants). Once within the body they are highly mobile and in some instances can even cross the blood-brain barrier.





How these nanoparticles behave inside the organism is one of the big issues that needs to be resolved. Basically, the behavior of nanoparticles is a function of their size, shape and surface reactivity with the surrounding tissue. They could cause “overload” on phagocytes, cells that ingest and destroy foreign matter, thereby triggering stress reactions that lead to inflammation and weaken the body’s defense against other pathogens. Apart from what happens if non- or slowly degradable nanoparticles accumulate in organs, another concern is their potential interaction with biological processes inside the body: because of their large surface, nanoparticles on exposure to tissue and fluids will immediately absorb onto their surface some of the macromolecules they encounter. Can this, for instance, affect the regulatory mechanisms of enzymes and other proteins?

What is nano technology? How can this be programmed into a certain product like skin care cream?
nano technology are microscopic robots/devices that are so small they work at cellular level.





You could theortically make/put them into a skin care cream and have them programmed to go repair damage to skin cells..this would correct acne, age lines, etc.
Reply:Nanotechnology is the science of the very small. I am sure that the cosmetics industry will find a use for it some day.





Try visiting some web sites that describe nanotechnology and then thinking of ways that this could be used in skin care.
Reply:well nano technology is developing gadgets and things so small that even an ant can hold a mobile phone u know things so minute that they are not even visible .well i don't know much about its usage just hear this in a physics class.i suggest u check this on wikipedia the site is en.wikipedia.org