Mechanical engineering researcher Junhong Chen believes his wafer-thin sensor will help detect even trace amounts of lead in water.

PhD candidate Guihau Zhou is one of six students who have dedicated three years helping Chen develop the technology in his lab at the Global Water Center┬áin the Walker’s Point neighborhood.

Zhou demonstrates by extracting a drop of water from a vial and releasing it onto a wafer-thin sensor. I wager it would take 10 sensors to fill the surface of a DIME.

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