An array of biosensors diagnosing biomarkers device and a drug delivery vehicle system including a plurality of biosensor arrays for diagnosing biomarkers concentrations, and a delivery vehicle dispensing drug, a electronic interface, a plurality of algorithms to relate biomarker concentrations and drug dispensed, wherein biosensors in said plurality of biosensor arrays are constructed from quantum dot field-effect transistors, and wherein one or more layers of cladded quantum dots are assembled in the channel, gate, and channel and gate regions of FETs, and wherein quantum dots are functionalized by DNA aptamers, antisense oligoneuclotides (ASOs), and DNAs, to sense biomarkers concentrations comprising at least one of proteins, miRNAs, and genes, and wherein the concentrations of biomarkers changes and their values change the magnitude of drain current as a function of time, and wherein the drain current signal is processed by an electronic interface.
