Since the mood rings, smart tattoos have been the hottest trend. The news trending is that when these smart tattoos become ordinary, they will become a tool to listen to vital and not-so-vital signs. However, the reason why they are not doing it is the lack of power. However a researcher from UCSD, Joseph Wang, has invented a technique to supply power to them without using an external tool. The new technique is to extract electrons from lactate acid secreted in sweat and generate power through it.
The building up of lactic acid has been associated with the muscle 'burn', which is secreted when we exercise to exhaustion. This lactate is a waste product for the muscle but on contrary, human brain thrives on lactate. Thus, for muscle, the brain serves as its metabolic trashcan.
Exercise physiologists have determined ways to measure lactate levels in the blood or muscle. When lactate was found to be discharged in sweat, another sensor innovative technology was conceived. Wang has made the subsequent rational step of adding supplies to gather charge when lactate is enzymatic-ally sensed. By inserting enzymes that makes lactate to react with the tattoo, Wang effectively extracted 70 microwatts/cm² of skin.
That measure can be a bit deceiving, in light of the fact that the gadget was just a couple of millimeters in size thus just made around 4 microwatts. Speaking technically, if you say that you made $1,000 for every hour during the hour of getting your paycheck for the week, then who can blame you if you can measure that? For this technique to work, you need to be hot, which means accelerating your heart out on a bicycle for 30 minutes or so to secrete lactate out.
One could envision specifically initiating the sympathetic nerves that control the sweat organs in a discrete patch of skin. That way, one can override typical control and can sweat without high body temperature or effort. The other piece of the riddle would be to really produce the lactic acid. Ideally, this would be carried out locally, instead of having high circulation of blood.
Different researchers have envisioned e-tattoos to read the thoughts and desires. This idea is not a grandmother's skin conductance, but instead it is a modern electronic bundle with signal processing and correspondences. With a discrete approach to power such gadgets, an imposing device for self revelation may be had.
Bruce McCoy is the head of Sales Department at Researchomatic and he shares some interesting facts about Generation of electricity via smart tattoo using sweat