Temporary tattoo transforms sweat into energy

If there are already little doubt that physical exercise is excellent for health, now he can contribute directly to sustainability. This is because a group of researchers at the University of California, San Diego, United States, created a technology that enables smartphone users to carry these devices through sweat.

To achieve this feat unlikely, the researchers created a temporary tattoo able to transform the sweat into energy. According to a presentation made in American Society of Chemistry (ACS), the device detects the lactate, natural component of sweat and the more intense the exercise, the greater the amount of lactate produced by the body. Thus, during an intense physical activity the body needs to generate more energy through glycolysis, a process that produces lactate.

To take advantage of this situation, the team at the University of California created a biobateria, a type of adhesive capable of measuring the amount of lactate in the sweat. In addition to detecting the organic compound, an enzyme that removes electrons from lactate and generates an electrical current.

In the tests, the researchers measured the amount of lactate in the sweat and the electric current produced while the volunteers exercised on exercise bikes with various intensities during 30 minutes.

According to the sustainable planet, the results were astounding. The volunteers who exercised less than once a week have produced more power than that made of one to three times a week. Who worked out more than three times a week, on the other hand, has produced the least amount of energy.

This happens because the more sedentary get tired faster, which causes glucose happen earlier in the body. Each volunteer has generated about 70 microwatts per square centimeter of skin, but the electrodes of biobateria generated about four microwatts â€" the value is not high, but if the technology is improved-and will be-, the shipment of smartphones, clocks and other devices will be a reality.

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