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学者姓名：林悦
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Abstract ：
Halide perovskites have emerged as a highly promising class of photoelectric materials. However, the application of lead-based perovskites has been hindered by their toxicity and relatively weak stability. In this work, a composite material comprising a lead-free perovskite cesium copper iodide (CsCu2I3) nanocrystal and a metal-organic framework (MOF-801) has been synthesized through an in situ growth approach. The resulting composite material, denoted as CsCu2I3/MOF-801, demonstrates outstanding stability and exceptional optoelectronic characteristics. MOF-801 may serve a dual role by acting as a protective barrier between CsCu2I3 nanocrystals and the external environment, as well as promoting the efficient transfer of photogenerated charge carriers, thereby mitigating their recombination. Consequently, CsCu2I3/MOF-801 demonstrates its utility by providing both stability and a notably high initial photocurrent. Leveraging the inherent reactivity between H2S and the composite material, which results in the formation of Cu2S and structural alteration, an exceptionally sensitive photoelectrochemical sensor for H2S detection has been designed. This sensor exhibits a linear detection range spanning from 0.005 to 100 mu M with a remarkable detection limit of 1.67 nM, rendering it highly suitable for precise quantification of H2S in rat brains. This eco-friendly sensor significantly broadens the application horizon of perovskite materials and lays a robust foundation for their future commercialization.
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| GB/T 7714 | Mao, Mengfan , Zu, Yexin , Zhang, Yating et al. Photoelectrochemical Sensor for H2S Based on a Lead-Free Perovskite/Metal-Organic Framework Composite [J]. | ANALYTICAL CHEMISTRY , 2024 , 96 (10) : 4290-4298 . |
| MLA | Mao, Mengfan et al. "Photoelectrochemical Sensor for H2S Based on a Lead-Free Perovskite/Metal-Organic Framework Composite" . | ANALYTICAL CHEMISTRY 96 . 10 (2024) : 4290-4298 . |
| APA | Mao, Mengfan , Zu, Yexin , Zhang, Yating , Qiu, Yongzhen , Lin, Yue , Luo, Fang et al. Photoelectrochemical Sensor for H2S Based on a Lead-Free Perovskite/Metal-Organic Framework Composite . | ANALYTICAL CHEMISTRY , 2024 , 96 (10) , 4290-4298 . |
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Abstract ：
The electrochemiluminescence (ECL) intensity can be regulated by ionic current passing through the microchannel, which broadened the regulation of the ECL sensors. But in the early reported sensors, the electrostatic repulsion and steric hindrance caused few targets to approach the interface of the microchannel driven by concentration difference, which reduced the detection efficiency and prolonged the detection period. In this study, different accumulation strategies, such as a positive electric field and different polarity electric fields, were designed to accumulate targets in the microchannel. The interaction of azide groups and hydrogen sulfide served as a research model. Hydrogen sulfide can react with the negatively charged azide groups in the microchannel surface to produce positively charged amino groups, decreasing the negative charge density of the microchannel and thus altering the ionic current and ECL intensity. The accumulation of hydrogen sulfide at the microchannel tip can increase the collision probability with azide groups to improve the detection efficiency, and the integration of accumulation and reaction can shorten the detection period to 28 min. The hydrogen sulfide concentration on the microchannel tip accumulated by applying different polarity electric fields was 22.3-fold higher than that accumulated by applying a positive electric field. The selected research model broadened the application range of a microchannel-based ECL sensor and confirmed the universality of the microchannel-based ECL sensor.
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| GB/T 7714 | Huang, Yanling , Cai, Huabin , Lin, Yue et al. Charge Density-Regulated Microchannel-Based Electrochemiluminescence Sensor for Hydrogen Sulfide Detection with a Highly Efficient Accumulation Strategy [J]. | ANALYTICAL CHEMISTRY , 2024 , 96 (13) : 5251-5257 . |
| MLA | Huang, Yanling et al. "Charge Density-Regulated Microchannel-Based Electrochemiluminescence Sensor for Hydrogen Sulfide Detection with a Highly Efficient Accumulation Strategy" . | ANALYTICAL CHEMISTRY 96 . 13 (2024) : 5251-5257 . |
| APA | Huang, Yanling , Cai, Huabin , Lin, Yue , Luo, Fang , Lin, Cuiying , Wang, Jian et al. Charge Density-Regulated Microchannel-Based Electrochemiluminescence Sensor for Hydrogen Sulfide Detection with a Highly Efficient Accumulation Strategy . | ANALYTICAL CHEMISTRY , 2024 , 96 (13) , 5251-5257 . |
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A simple and highly sensitive method for detection of miRNA was constructed by combining the high-efficiency thiolated-mediated strand displacement (TMSD) non-enzymatic amplification and the high -reproducibility electrochemiluminescence/electrochemistry (ECL/EC) ratio sensing technique. The EC signal generated by methylene blue (MB) modified on the electrode was used as the internal reference signal, and Ru(phen)(3)(2+) was embedded in DNA nanoparticles produced by the branched hybridization chain reaction as the ECL probe. The presence of target miRNA facilitated the detachment of MB from electrode surface and the modification of ECL beacon on the electrode, resulting in a decrease of the EC signal and an enhancement of the ECL signal. The method of using the ratio of ECL signal to EC signal reduced potential interference and improved reproducibility and sensitivity of the biosensor. The ratio of ECL/EC signals exhibited linear relationship with miRNA-21 concentration in the range from 10 fmol/L to 500 pmol/L, with a detection limit of 6.5 fmol/L, and the relative standard deviation of the assay was reduced from 8.2 % to 4.1 % when determining 1 pmol/L target miRNA-21 compared to that using single ECL signal. This method was preliminarily applied to the detection of miRNA-21 in complex cell samples.
Keyword ：
Electrochemiluminescence Electrochemiluminescence Electrochemistry Electrochemistry miRNA miRNA Ratiometric biosensor Ratiometric biosensor Toehold-mediated strand displacement Toehold-mediated strand displacement
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| GB/T 7714 | Jin, Xiao-Ya , Zhang, Ying , Lin, Yue et al. Ratiometric Electrochemiluminescence/Electrochemistry Sensor for miRNA Based on Toehold-Mediated Strand Displacement Amplification [J]. | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY , 2024 , 52 (5) : 743-750 . |
| MLA | Jin, Xiao-Ya et al. "Ratiometric Electrochemiluminescence/Electrochemistry Sensor for miRNA Based on Toehold-Mediated Strand Displacement Amplification" . | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 52 . 5 (2024) : 743-750 . |
| APA | Jin, Xiao-Ya , Zhang, Ying , Lin, Yue , Lin, Zhen-Yu . Ratiometric Electrochemiluminescence/Electrochemistry Sensor for miRNA Based on Toehold-Mediated Strand Displacement Amplification . | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY , 2024 , 52 (5) , 743-750 . |
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