量子点
光电流
对映体
材料科学
光电子学
电极
电化学
再现性
逐层
超分子化学
纳米技术
图层(电子)
化学
色谱法
立体化学
物理化学
分子
有机化学
作者
Yuechao Zhao,Huan Luo,Qingmei Ge,Mao Liu,Zhu Tao,Hang Cong
标识
DOI:10.1016/j.snb.2021.129750
摘要
With a facile preparation for graphitic carbon nitride quantum dots (g-C3N4 QDs), an ultrasensitive photoelectrochemical (PEC) sensor was developed with the supramolecular affinity of chiral multifarene[3,2,1] (CMF) to a hormone drug, thyroxine (T4), for efficient identification of thyroxine enantiomers. In the principle that g-C3N4 QDs was employed to achieve the photocurrent response and the macrocyclic compound served as the supramolecular enantiorecognition for thyroxine, the photoelectrochemical electrode was constructed by layer-by-layer assembly of g-C3N4 QDs and CMF on the surface of ITO (ITO-g-C3N4-CMF QDs). The proposed PEC sensor produced the limits of detection low to 67 pM towards L-T4 and 85 pM towards D-T4 in a concentration range from 0.1 nM to 10 nM, which was superior to the values in pioneering reports with colorimetric or electrochemical methods. With good stability, reproducibility, repeatability anti-interference ability, and acceptable recoveries, the proposed PEC sensor was employed for quantitative determination of L/D-T4 in water, human serum and commercial tablet.
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