Single‐Atom Materials as Electrochemical Sensors: Sensitivity, Selectivity, and Stability

Zheng, Wei

doi:10.1002/anse.202200070

Cited by 1 publication

(2 citation statements)

References 81 publications

(126 reference statements)

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“…Electrochemical analysis is a technique that involves the measurement of electrical signals from chemical reactions occurring at the electrode interface [1]. Because of the obvious advantages of high sensitivity, fast response time, simple operation, and miniaturization, electrochemical sensors have become an important analytical tool in areas such as environmental and biological samples [2].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of a large number of unsaturated, low-coordinated metal atoms in SANs facilitates signal amplification and also improves the selectivity of detection by adjusting the metal centers and their coordination environment, which is conducive to achieving sensitive detection of trace substances. By adjusting the structure of SANs, researchers have continuously optimized their sensitivity, selectivity, and stability in sensing, making them great candidates for development in analytical chemistry [1,9,10]. According to the classification of support materials, they broadly include metal-carbon-based materials [11][12][13][14][15][16], metal-metal oxides [17][18][19], metalmetal sulfides [20][21][22], and metal-metal substrates [23,24] (i.e., single-atom alloys) synthesized mainly through three strategies, including defect engineering strategy, spatial confinement strategy, and sacrificial template-assisted strategy (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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Single-Atom Nanomaterials in Electrochemical Sensors Applications

Fu,

Liu

2023

Chemosensors

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In recent years, the development of highly sensitive sensors has become a popular research topic. Some functional nanomaterials occupy an important position in the sensing field by virtue of their unique structures and catalytic properties, but there are still problems such as low sensitivity and poor specificity. Single-atom nanomaterials (SANs) show significant advantages in amplifying sensing signals and improving sensor interference resistance due to their high atomic utilization, structural simplicity, and homogeneity. They are expected to achieve high sensitivity and high specificity monitoring by modulating the active sites. In this review, the recent progress on SANs for electrochemical sensing applications was summarized. We first briefly summarize the features and advantages of single-atom catalysts. Then recent advances in the regulation of reaction sites in noble and non-noble metal-based SANs, including the introduction of defects in the carrier, other metal atoms, and ligand atoms, were highlighted. After that, the SANs for the construction of electrochemical, electrochemiluminescent (ECL), and photoelectrochemical (PEC) sensors and their applications in biochemical and environmental analysis were demonstrated. Finally, the future research aspect of SANs-based electrochemical sensing and the challenges of the SANs design and structure-properties revelation were illustrated, giving guidance on sensitive and accurate biosensing toward clinic diagnostic and environmental analysis.

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Section: Introductionmentioning

confidence: 99%