Abstract
A novel CdTe quantum dots-single walled carbon nanohorns (CdTe-SWCNHs) nanocomposite was synthesized via a one-pot method for photoelectrochemical (PEC) aptasensing detection of streptomycin (STR). The CdTe-SWCNHs nanocomposite shows 3.2-times amplified PEC activity in comparison with CdTe quantum dots (QDs). By using aptamers as recognition element and CdTe-SWCNHs as photoactive species, a PEC aptasensor was fabricated for the high sensitive and selective detection of STR. Under the optimized conditions, the as-fabricated PEC aptamer sensor exhibits a linear response ranging from 0.1nM (0.15μgkg−1) to 50nM (72.85μgkg−1) with a detection limit (S/N=3) of 0.033nM (0.05μgkg−1). The aptasensor has successfully applied for the determination of streptomycin in honey sample, which provides a new method for detection of streptomycin.
Published Version
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