This Smart Tag Knows If Food Or Medicine Is Not Fit For Consumption

Researchers at Peking University in Beijing, China are working on a color-coded “smart tags”  that can be placed on food and beverage containers in order to determine as to whether the products within are spoiled, or can still be consumed.

Lead researcher Chao Zhang shared, “This tag, which has a gel-like consistency, is really inexpensive and safe, and can be widely programmed to mimic almost all ambient-temperature deterioration processes in foods.”

While most food and medicine have expiration labels, sometimes products are subjected to unanticipated high temperatures that could lead to early spoiling. Zhang said the smart tags could even take these sorts of variables into account. The color-coding on the tags would indicate the quality of the food or medicine on a range of 100 percent fresh to 100 percent spoiled.

“In our configuration, red or reddish orange, would mean fresh,” Zhang said. “Over time, the tag changes its color to orange, yellow and later green, which indicates the food is spoiled.”

The science behind the tags is based on tiny non-toxic metallic nanorods that change color as they react to the length of time microbes grow in food. For example, “the gold nanorods we used are inherently red, which dictates the initial tag color,” Zhang said.

The smart tag research was presented on Monday at a national meeting of the American Chemical Society. The smart tags aren’t yet available, but the Peking University researchers said they are currently in the process of reaching out to manufacturers.

Source: cnet.com, ubergizmo.com