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- W2017124911 abstract "Abstract As one of the most environmentally important cations, mercury(II) iron has the biological toxicity which impacts wild life ecology and human health heavily. A Hg2+ biosensor based on AlGaAs/InGaAs high electron mobility transistors with high sensitivity and short response time is demonstrated experimentally. To achieve highly specific detection of Hg2+, an one-end thiol-modified ssDNA with lots of T thymine is immobilized to the Au-coated gate area of the high electron mobility transistors by a covalent modification method. The introduction of Hg2+ to the gate of the high electron mobility transistors affects surface charges, which leads to a change in the concentration of the two-dimensional electron gas in the AlGaAs/InGaAs high electron mobility transistors. Thus, the saturation current curves can be shifted with the modification of the gate areas and varied concentrations of Hg2+. Under the bias of 100 mV, a detection limit for the Hg2+ as low as10 nM is achieved. Successful detection with minute quantity of the sample indicates that the sensor has great potential in practical screening for a wide population. In addition, the dimension of the active area of the sensor is 20×50 μm2 and that of the entire sensor chip is 1×2 mm2, which make the Hg2+ biosensor portable." @default.
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- W2017124911 date "2015-09-01" @default.
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- W2017124911 title "Specific detection of mercury(II) irons using AlGaAs/InGaAs high electron mobility transistors" @default.
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- W2017124911 doi "https://doi.org/10.1016/j.jcrysgro.2015.02.011" @default.
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