Ultrasensitive Photoelectrochemical Aptasensor for Detecting Telomerase Activity Based on Ag &lt;sub&gt;2&lt;/sub&gt;s/Ag Decorated ZnIn &lt;sub&gt;2&lt;/sub&gt;S &lt;sub&gt;4&lt;/sub&gt;/C &lt;sub&gt;3&lt;/sub&gt;N &lt;sub&gt;4&lt;/sub&gt; 3D/2D Z-Scheme Heterostructures and Amplified by Au/Cu &lt;sup&gt;2+&lt;/sup&gt;-Boron-Nitride Nanozyme

Zhu, Jian-Hong; Gou, Hongwei; Zhao, Tiejun; Mei, Li-Ping; Wang, Ai‐Jun; Feng, Jiu‐Ju

doi:10.2139/ssrn.4001447

Cited by 1 publication

(1 citation statement)

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“…42 In addition, two peaks for the S 2p of Ag@ZnS HNWs at 161.1 and 162.1 eV were attributed to S 2p 3/2 and S 2p 1/2 (Figure 3d), respectively, whereas the other peak at about 168.9 eV belonged to S−O. 43,44 Evaluation of Oxidase-like Catalytic Activity of Ag@ ZnS. To investigate the oxidase-like behavior of the collected Ag@ZnS, TMB, a common chromogenic substrate for oxidase catalysis, was employed in this study.…”

Section: ■ Materials and Methodsmentioning

confidence: 96%

Plasmon-Mediated Oxidase-like Activity on Ag@ZnS Heterostructured Hollow Nanowires for Rapid Visual Detection of Nitrite

Tian

Huang

et al. 2023

Inorg. Chem.

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Rational design of fast and sensitive determination of nitrite (NO2 –) from a complicated actual sample overtakes a crucial role in constructing a high-efficiency sensing platform. Herein, a visual NO2 – sensing platform with outstanding selectivity, sensitivity, and stability based on a surface plasmon resonance (SPR)-enhanced oxidase-like activity has been proposed. Benefiting from the intrinsic photocatalytic activity and limited light penetration of ZnS, the oxidase-like activity based on ZnS decorated on Ag nanowires (Ag@ZnS) is determined. It is demonstrated that the electrons are generated efficiently on the surface of ZnS and then transferred into the hot electrons of Ag with the help of localized SPR excitation, thus greatly oxidating the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to produce dark blue oxidized TMB (oxTMB). When nitrite is added into the reaction system, the oxTMB will selectively react with NO2 – to generate diazotized oxTMB, leading to a visual color change from dark blue to light green and subsequently to dark yellow. Owing to the specific recognition between nitrite and oxTMB, the recovery of catalytic activity induced an enhanced colorimetric test with a wider linear range for NO2 – determination, an ultralow detection limit of 0.1 μM, excellent selectivity, and practicability for application in real samples. This plasmon-enhanced oxidase-like activity not only provides a smart approach to realize a colorimetric assay with high sensitivity and simplicity but also modulates oxidase-like activities.

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Section: ■ Materials and Methodsmentioning

confidence: 96%