场效应晶体管
钝化
材料科学
水溶液
晶体管
离子强度
四环素类抗生素
检出限
离子键合
纳米技术
化学
四环素
离子
物理化学
有机化学
色谱法
抗生素
生物化学
物理
量子力学
电压
图层(电子)
作者
Xiaoyan Chen,Qiuju Li,Taoyue Yuan,Mengtao Ma,Ziwei Ye,Xiaojie Wei,Xian Fang,Shun Mao
出处
期刊:ACS Sensors
[American Chemical Society]
日期:2023-01-26
卷期号:8 (2): 858-866
被引量:5
标识
DOI:10.1021/acssensors.2c02562
摘要
Two-dimensional (2D) black phosphorus (BP) has been reported to have appealing semiconducting properties as the sensing channel in field-effect transistor (FET) sensors. However, the intrinsic instability of BP in water greatly hinders its application, and little is known about its sensing performance and mechanism in aqueous medium. Herein, a water-stable BP FET sensor for antibiotic detection is reported. A novel surface engineering strategy with Ag+ coordination and melamine cyanurate (MC) supramolecular passivation is utilized to enhance the stability and transistor performance of BP. With molecularly imprinted polymers (MIPs) as the detection probe for tetracycline, the BPAg(+)/MC/MIPs sensor shows high sensitivity to tetracycline with a detection limit of 7.94 nM and a quick response within 6 s as well as high selectivity against other antibiotics with similar molecular structures. A new sensing mechanism relying on the conjugation effect of the probe structure is proposed, and new knowledge about alkalinity-enhanced and ionic strength-related response from the electrostatic gating effect is given based on the solution chemistry impact study. This work offers an efficient surface engineering strategy to enable the application of 2D BP for antibiotic detection in aqueous medium and presents a new sensing mechanism in chemical analysis by FET sensors.
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