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36 results on '"Yang, Zhehan"'

19. Highly Stable Lithium Metal Anode Constructed by Three-Dimensional Lithiophilic Materials.

Author

Yang, Zhehan, Ruan, Qingling, Xiong, Yi, and Gu, Xingxing

Subjects
METALS, ANODES, ENERGY density, REDUCTION potential, LITHIUM
Abstract

Although lithium metal anode has irreplaceable advantages, such as ultra-high specific energy density and ultra-low redox potential, a variety of issues, i.e., short cycle life, low Coulomb efficiency, and tendency to cause fire explosions caused by lithium dendrite growth and high reactivity to the electrolyte, seriously hinder the practical progress of lithium metal anode. This perspective summarizes how 3D lithiophilic materials have stabilized lithium metal anodes in recent years by improving the uneven deposition of lithium metal, alleviating the volume expansion of lithium metal anodes, and limiting dendrite growth. Simultaneously, the issues of the 3D composite lithium anodes in practical application are concluded and the research direction of 3D composite lithium anode is prospected. [ABSTRACT FROM AUTHOR]

Published
2023
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30. A Sensitive Electrochemical Aptasensor for Thrombin Detection Based on Electroactive Co-Based Metal–Organic Frameworks with Target-Triggering NESA Strategy

Author

Yang, Xia, Lv, Jiajia, Yang, Zhehan, Yuan, Ruo, and Chai, Yaqin

Abstract

In this work, an improved target-triggering nicking enzyme signaling amplification (NESA) strategy as signal enhancer has been fabricated to obtain a sensitive electrochemical thrombin (TB) biosensor combined with PtPd NPs decorated electroactive Co-based metal–organic frameworks (Co-MOFs/PtPdNPs) as a redox mediator. Traditionally, in the NESA strategy, only one of the output double strands DNA is available in the next cycle. However, in this work, all of the output DNA involved in the improved NESA strategies could be further employed, resulting in high utilization of output DNA, which further enhanced signal amplification and sensitivity of the biosensor. In addition, the electroactive Co-MOFs were not only used as nanocarriers but also acted as signal labels, avoiding adding extra redox media. Simultaneously, in the presence of H2O2, PtPd NPs decorated on the Co-MOFs act the same as horseradish peroxidase to promote the oxidation of H2O2, further promoting the conversion of Co2+to Co3+, leading to electrochemical signal amplification. With such design, the TB biosensor exhibited good sensitivity from 1 pM to 30 nM with a detection limit of 0.32 pM. This new NESA strategy with high utilization of output DNA can supply one efficient approach to improve signal amplification, which also open an avenue for sensitivity enhancement in detection of analytes.

Published
2024
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36. Hollow platinum decorated Fe3O4 nanoparticles as peroxidase mimetic couple with glucose oxidase for pseudobienzyme electrochemical immunosensor.

Author

Yang, Zhehan, Chai, Yaqin, Yuan, Ruo, Zhuo, Ying, Li, Ya, Han, Jing, and Liao, Ni

Subjects
*PLATINUM, *IRON oxide nanoparticles, *PEROXIDASE, *GLUCOSE oxidase, *ELECTROCHEMICAL sensors, *BIOSENSORS, *ALPHA fetoproteins
Abstract

Abstract: In this paper, a novel dual signal amplification strategy was proposed based on hollow platinum nanoparticles decorated Fe3O4 nanoparticles (HPtNPs-Fe3O4) and glucose oxidase (GOD) for sensitive detection of α-1-fetoprotein (AFP). In such system, HPtNPs-Fe3O4 couples with glucose oxidase to form a pseudobienzymatic system because both HPtNPs and Fe3O4 nanoparticles (NPs) have peroxidase-like catalytic activity and this peroxidase mimetic is more stable and economical than natural peroxidases. With the employment of bovine serum albumin (BSA), the biocompatibility, stability and water solubility of Fe3O4 NPs was further enhanced. The BSA functionalized Fe3O4 NPs provided lysine groups to immobilized HPtNPs, antibodies and GOD, which further amplified the detection signal. The results show that the sensor exhibited attractive redox electrochemical activity and high catalysis activity when detected in the working buffer containing 3.6mM D-glucose. The electrochemical immunosensor exhibited a linear range of 0.01–60ng/mL with a low detection limit of 1.6pg/mL. [Copyright &y& Elsevier]

Published
2014
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