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Schematic cross sectional view of the ZnO nanorod-gated HEMT.
Scanning microscope images of arrays of HEMT sensors (top) with ZnO nanorods grown on the gate region (bottom). Scanning microscope images of the ZnO nanorod array in the gate region (bottom).
Plot of drain current vs time with successive exposure to higher lactic acid concentrations, ranging from .
Current change in HEMT sensor as a function of lactic acid concentration.
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