molecular nanobots
While many in the nanotech establishment dismiss molecular nanobots as science f
iction many of the recent breakthroughs in nanobiotech point to the emergence of hybrid biomechanical nanomachines Molecular Nanobot in the Bloodstream In Japan photo-reactive nanocrystals are being developed for more efficient solar cell production. Rice University is developing methods that use the reactivity of nanoparticles to clean contaminants, especially biological contaminants from water. In agriculture, nano-sensors will be sprinkled on crops or soil to monitor temperature, water, salinity, nitrogen and disease. Robert Freitas is developing an artificial red blood cell able to deliver 236 times more oxygen to tissues than natural red blood cells.
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solar cells these days are not yet very efficient in generating electricity*-`
even with the price drop, solar cells are still quite expensive if you want to get more than 500 Watts .