Photoelectrochemical aptasensor based on CdTe quantum dots-single walled carbon nanohorns for the sensitive detection of streptomycin
Photoelectrochemical aptasensor based on CdTe quantum dots-single walled carbon nanohorns for the sensitive detection of streptomycin
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DOI：
10.1016/j.snb.2017.04.168
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发表时间：
2017-11
影响因子：
8.4
通讯作者：
Xixi Xu;Dong Liu;Lijun Luo;Libo Li;Kun Wang;Tianyan You
中科院分区：
文献类型：
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作者：
Xixi Xu;Dong Liu;Lijun Luo;Libo Li;Kun Wang;Tianyan You
采用“一锅法”合成了一种新型的CdTe量子点-单壁碳纳米角（CdTe-SWCNHs）纳米复合材料，并将其用于链霉素（STR）的光电化学（PEC）适配传感检测。与CdTe量子点（QD）相比，CdTe-SWCNHs纳米复合物显示出3.2倍放大的PEC活性。以核酸适体为识别元件，以CdTe-SWCNHs为光敏物种，构建了一种可用于STR高灵敏、高选择性检测的PEC适体传感器。所制造的PEC适体传感器表现出从0.1nM（0.15 μg kg−1）至50 nM（72.85 μg kg−1），检测限（S/N= 3）为0.033 nM（0.05 μg kg−1）。该适配器已成功应用于蜂蜜样品中链霉素的测定，为链霉素的检测提供了一种新的方法。
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 0.1 nM (0.15 μg kg−1) to 50 nM (72.85 μg kg−1) with a detection limit (S/N= 3) of 0.033 nM (0.05 μg kg−1). The aptasensor has successfully applied for the determination of streptomycin in honey sample, which provides a new method for detection of streptomycin.