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Lead poisoning is a serious environmental concern,which is a health threat.Existing technologies always have some drawbacks,which restrict their application ranges,such as real time monitoring.To solve this problem,glutathione was functionalized on the Au-coated gate area of the pseudomorphic high electron mobility transistor(pHEMT) to detect trace amounts of Pb~(2+).The positive charge of lead ions will cause a positive potential on the Au gate of the pHEMT sensor,which will increase the current between the source and the drain.The response range for Pb~(2+) detection has been determined in the concentrations from 0.1 pmol/L to 10 pmol/L.To our knowledge,this is currently the best result for detecting lead ions.
Lead poisoning is a serious environmental concern, which is a health threat. Existing technologies always have some harms, which restrict their application ranges, such as real time monitoring. Solve this problem, glutathione was functionalized on the Au-coated gate area of the Pseudomorphic high electron mobility transistor (pHEMT) to detect trace amounts of Pb ~ (2 +). The positive charge of lead ions will cause a positive potential on the Au gate of the pHEMT sensor, which will increase the current between the source and the drain. The response range for Pb 2+ detection has been determined in the concentrations from 0.1 pmol / L to 10 pmol / L.To our knowledge, this is currently the best result for detecting lead ions.