Making a Mark on Biosensing | AIChE

Making a Mark on Biosensing


Tattooing, the act of inserting inks and dyes into human skin to permanently mark it, is a form of artistic expression, symbolism, and identification that has existed for thousands of years. More than 60 inked symbols were found on the body of Ötzi, a 5,000-year-old mummy also known as the Iceman. Over the years, countless cultural groups have adopted distinctive tattoo imageries. Today, tattoos are more common than ever.

Recently, a team of scientists at the Technical Univ. of Munich (TUM) developed tattoos that change color in response to changes in glucose, pH, and albumin (a carrier protein) concentration. They also designed these color changes to be visible to the naked eye, and easily quantifiable through a simple smartphone app. The technology could have interesting implications for biosensing, which uses sensors integrated with the human body to detect chemical substances...

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