中文摘要：于此，开发了一种新型的基于全碳纳米复合材料作传感器支架，结合吸收了树枝状硅酞菁(SiPcs)的准八面体TiO2介晶(QOTM)作高效生物探针的检测黄曲霉毒素B1（AFB1）的光电化学传感器。该新开发的方法为小分子的高灵敏检测提供了通用的方法。
外文摘要：Herein, a new photoelectrochemical sensor for aflatoxin B1 (AFB1) detection was established based on the all-carbon nanohybrids as transducer scaffold accompanied with quasi-octahedral TiO2 mesocrystal (QOTM) absorbed dentritic Si phthalocyanines (SiPcs) as the efficient bioprobe. Specifically, the all-carbon nanocomposites exhibited fine photoelectric properties due to the photo-generated electrons of carbon quantum dots could be rapidly accepted by conductive carbon nanohorns, which evidently expedited the electron transport, and the nanohybrids were first employed as affinity support to anchor AFB1 antibody. The dentritic SiPcs sensitized QOTM presented better photocurrent response and stability in comparison with QOTM alone due to impressive light-harvesting capability of the dentritic SiPcs. Under light irradiation, the photo-induced electrons of SiPcs migrated to the QOTM, and successively transferred to carbon quantum dots as electron relay mediator then via carbon nanohorns to the electrode surface based on suitable band alignment. This hierarchical charge transport cascade paradigm efficiently impeded the charge recombination, resulting in noticeably increased photocurrent. In this competitive immunosensor, the AFB1 standards compete with the labeled AFB1, leading to photocurrent decreased with the increasing target concentration in a wide linear range of 10− 6–102 ng/mL. The newly developed methodology provided a versatile approach for ultrasensitive detection of small molecules.
外文关键词：Photoelectrochemical biosensor；Carbon quantum dots；TiO2 mesocrystal；Si phthalocyanines；Aflatoxin B-1
作者：Li, YL；Zhang, SP；Dai, H；Lin, YY；Zeng, BS；Hong, ZS
作者单位：Fujian Normal Univ
期刊名称：JOURNAL OF ELECTROANALYTICAL CHEMISTRY
期刊影响因子：2.822
出版年份：2016
出版刊次：12
点击下载：酞菁硅修饰的TiO2介晶结合多功能全碳结构用于光电化学免疫检测中的多级级联信号放大器