Fast, specific, and ultrasensitive antibiotic residue detection by monolayer WS2-based field-effect transistor sensor

文献类型： 外文期刊

第一作者： Wei, Xiaojie

作者： Wei, Xiaojie;Qin, Hehe;Ye, Ziwei;Liu, Xinru;Zong, Boyang;Li, Zhuo;Mao, Shun;Wei, Xiaojie;Qin, Hehe;Ye, Ziwei;Liu, Xinru;Zong, Boyang;Li, Zhuo;Mao, Shun;Liu, Chengbin

作者机构：

关键词： Antibiotic detection; Ampicillin; Field-effect transistor; Monolayer WS 2; Aptamer DNA

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2023 年 443 卷

页码：

收录情况： SCI

摘要： Antibiotic residues cause increasing concern in environmental ecology and public health, which needs efficient analysis strategy for monitoring and control. In this study, a fast, specific, and ultrasensitive sensor based on field-effect transistor (FET) has been proposed for the detection of ampicillin (AMP). The sensor involves monolayer tungsten disulfide (WS2) nanosheet as the sensing channel, single-stranded DNA (ssDNA) as the sensing probe, and gold nanoparticle (Au NP) as the linker. The WS2/Au/ssDNA FET sensor responds rapidly to AMP in a wide linear detection range (10- 12-10- 6 M) and has low limit of detection (0.556 pM), which meets the permissible standards of AMP in water and food. The sensing mechanism study suggests that the excellent sensor response results from the increased number of negative charges in the Debye length and the consequent accu-mulation of holes in WS2 channel after the addition of AMP. Moreover, satisfactory sensing performance was confirmed in real water samples, indicating the potential application of the proposed method in practical AMP detection. The reported FET sensing strategy provides new insights in antibiotic analysis for risk assessment and control.

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